Scholars@Duke

• Background
• 

  Education, Training, & Certifications

  • Ph.D., University of Wisconsin - Madison 1994
  • B.A., Gustavus Adolphus College 1989
• 

  Duke Appointment History

  • Director of Undergraduate Studies of Chemistry, Chemistry, Trinity College of Arts & Sciences 2018 - 2019
  • Associate Professor of Chemistry, Chemistry, Trinity College of Arts & Sciences 2003 - 2007
  • Assistant Professor of Chemistry, Chemistry, Trinity College of Arts & Sciences 1997 - 2003
• Recognition
• 

  Awards & Honors

  • Sloan Research Fellowship-Chemistry. Alfred P. Sloan Foundation. 2000
• Research
• 

  Selected Grants

  • Reactive Intermediates in Gold(I) Catalysis awarded by  National Science Foundation 2015 - 2021
  • Multi-State Catalysts Modulated by Mechanical Force awarded by Department of Energy 2017 - 2020
  • Hydrogenolysis of C(sp3)-O Bonds Catalyzed by Acidic Group 9 Hydride Complexes awarded by American Chemical Society 2016 - 2019
  • MRI: Acquisition of a Triple Quadrupole LC/MS System awarded by  National Science Foundation 2015 - 2018
  • Synthesis and study of potential intermediates in gold(I) pi-activation catalysis" awarded by  National Science Foundation 2012 - 2015
  • Fluxional Mechanocatalysis awarded by U.S. Army Research, Development & Engineering Command 2011 - 2014
  • MRI: Acquisition of An Accu-TOF DART Mass Spectrometer awarded by  National Science Foundation 2009 - 2012
  • Synthesis and Study of Cationic Gold (I) Alkene and Allene Complexes awarded by  National Science Foundation 2009 - 2012
  • Catalytic Hydrofunctionalization as a Route to Heterocyclic Compounds awarded by National Institutes of Health 2007 - 2011
  • Purchase of a Q-TOF LC/MS System awarded by National Institutes of Health 2010 - 2011
  • Catalytic Addition of Nucleophiles to Unactivated Olefins awarded by  National Science Foundation 2006 - 2010
  • Harnessing Macroscopic Forces in Catalysis awarded by Army Research Office 2008 - 2009
  • Palladium-Catalyzed Alkylation of Unactivated Olefins awarded by  National Science Foundation 2003 - 2006
  • Palladium Catalyzed Cyclization of Functionalized Dienes awarded by National Institutes of Health 1999 - 2004
• Publications & Artistic Works
• 

  Selected Publications

  • Academic Articles

    • Wang, Liqi, Yichen Yu, Anton O. Razgoniaev, Patricia N. Johnson, Chenxu Wang, Yancong Tian, Roman Boulatov, Stephen L. Craig, and Ross A. Widenhoefer. “Mechanochemical Regulation of Oxidative Addition to a Palladium(0) Bisphosphine Complex.” Journal of the American Chemical Society 142, no. 41 (October 2020): 17714–20. https://doi.org/10.1021/jacs.0c08506.
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    • Kim, N., and R. A. Widenhoefer. “Formation of Cyclopropanes via Activation of (γ-Methoxy)alkyl Gold(I) Complexes with Lewis Acids.” Organometallics 39, no. 17 (September 14, 2020): 3160–67. https://doi.org/10.1021/acs.organomet.0c00324.
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    • Zhang, Z., S. Liu, and R. A. Widenhoefer. “Kinetics and Mechanism of the Platinum(II)-Catalyzed Hydroarylation of Vinyl Arenes with 1,2-Dimethylindole.” Israel Journal of Chemistry 60, no. 3–4 (March 1, 2020): 437–45. https://doi.org/10.1002/ijch.201900065.
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    • Stow, C. P., and R. A. Widenhoefer. “Synthesis, Structure, and Reactivity of Gold(I) α-Oxo Carbenoid Complexes.” Organometallics, January 1, 2020. https://doi.org/10.1021/acs.organomet.0c00033.
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    • Kim, Nana, and Ross A. Widenhoefer. “Synthesis of gold allyloxysulfonium complexes and elimination to form an α,β-unsaturated aldehyde.” Chemical Communications (Cambridge, England) 55, no. 91 (November 2019): 13745–48. https://doi.org/10.1039/c9cc06589j.
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    • Carden, Robert G., and Ross A. Widenhoefer. “Gold Sulfonium Benzylide Complexes Undergo Efficient Benzylidene Transfer to Alkenes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 25, no. 47 (August 2019): 11026–30. https://doi.org/10.1002/chem.201902845.
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    • Kim, Nana, and Ross A. Widenhoefer. “Ionization of gold (γ-methoxy)vinyl complexes generates reactive gold vinyl carbene complexes.” Chemical Science 10, no. 24 (June 2019): 6149–56. https://doi.org/10.1039/c9sc01574d.
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    • Harris, R. J., R. G. Carden, A. N. Duncan, and R. A. Widenhoefer. “Kinetics and Mechanism of the Gold-Catalyzed Intermolecular Hydroalkoxylation of Allenes with Alcohols.” Acs Catalysis 8, no. 9 (September 7, 2018): 8941–52. https://doi.org/10.1021/acscatal.8b02211.
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    • Kim, Nana, and Ross A. Widenhoefer. “Synthesis, Characterization, and Reactivity of Cationic Gold Diarylallenylidene Complexes.” Angewandte Chemie (International Ed. in English) 57, no. 17 (April 2018): 4722–26. https://doi.org/10.1002/anie.201713209.
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    • Carden, Robert G., Nathan Lam, and Ross A. Widenhoefer. “Experimental Evaluation of (L)Au Electron-Donor Ability in Cationic Gold Carbene Complexes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 23, no. 71 (December 2017): 17992–1. https://doi.org/10.1002/chem.201703820.
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    • Lanier, Megan L., Hyeri Park, Paramita Mukherjee, Jacob C. Timmerman, Anthony A. Ribeiro, Ross A. Widenhoefer, and Jiyong Hong. “Formal Synthesis of (+)-Laurencin by Gold(I)-Catalyzed Intramolecular Dehydrative Alkoxylation.” Chemistry (Weinheim an Der Bergstrasse, Germany) 23, no. 30 (May 3, 2017): 7180–84. https://doi.org/10.1002/chem.201700499.
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    • Timmerman, Jacob C., Sébastien Laulhé, and Ross A. Widenhoefer. “Gold(I)-Catalyzed Intramolecular Hydroamination of Unactivated Terminal and Internal Alkenes with 2-Pyridones.” Organic Letters 19, no. 6 (March 7, 2017): 1466–69. https://doi.org/10.1021/acs.orglett.7b00450.
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    • Kim, N., R. E. M. Brooner, and R. A. Widenhoefer. “Unexpected Skeletal Rearrangement in the Gold(I)/Silver(I)-Catalyzed Conversion of 7-Aryl-1,6-enynes to Bicyclo[3.2.0]hept-6-enes via Hidden Brønsted Acid Catalysis.” Organometallics 36, no. 3 (February 13, 2017): 673–78. https://doi.org/10.1021/acs.organomet.6b00868.
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    • Timmerman, Jacob C., William W. Schmitt, and Ross A. Widenhoefer. “Gold-Catalyzed Intermolecular, anti-Markovnikov Hydroarylation of Methylenecyclopropanes with Indoles.” Organic Letters 18, no. 19 (October 2016): 4966–69. https://doi.org/10.1021/acs.orglett.6b02431.
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    • Harris, R. J., and R. A. Widenhoefer. “Gold carbenes, gold-stabilized carbocations, and cationic intermediates relevant to gold-catalysed enyne cycloaddition.” Chemical Society Reviews 45, no. 16 (August 2016): 4533–51. https://doi.org/10.1039/c6cs00171h.
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    • Li, H., R. J. Harris, K. Nakafuku, and R. A. Widenhoefer. “Kinetics and Mechanism of Allene Racemization Catalyzed by a Gold N-Heterocyclic Carbene Complex.” Organometallics 35, no. 13 (July 11, 2016): 2242–48. https://doi.org/10.1021/acs.organomet.6b00307.
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    • Brooner, R. E. M., T. J. Brown, M. A. Chee, and R. A. Widenhoefer. “Effect of Substitution, Ring Size, and Counterion on the Intermediates Generated in the Gold-Catalyzed Intramolecular Hydroalkoxylation of Allenes.” Organometallics 35, no. 11 (June 13, 2016): 2014–21. https://doi.org/10.1021/acs.organomet.6b00306.
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    • Bender, C. F., T. J. Brown, and R. A. Widenhoefer. “Mechanism of the Platinum(II)-Catalyzed Hydroamination of 4-Pentenylamines.” Organometallics 35, no. 2 (January 25, 2016): 113–25. https://doi.org/10.1021/acs.organomet.5b00821.
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    • Timmerman, J. C., and R. A. Widenhoefer. “Gold-Catalyzed Intermolecular anti-Markovnikov Hydroamination of Methylenecyclopropanes with 2-Pyridones.” Advanced Synthesis and Catalysis 357, no. 16–17 (November 16, 2015): 3703–6. https://doi.org/10.1002/adsc.201500866.
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    • Harris, Robert J., and Ross A. Widenhoefer. “Synthesis and Characterization of a Gold Vinylidene Complex Lacking π-Conjugated Heteroatoms.” Angewandte Chemie (International Ed. in English) 54, no. 23 (June 2015): 6867–69. https://doi.org/10.1002/anie.201501474.
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    • Robertson, Bradley D., Rachel E. M. Brooner, and Ross A. Widenhoefer. “Tandem gold/silver-catalyzed cycloaddition/hydroarylation of 7-aryl-1,6-enynes to form 6,6-diarylbicyclo[3.2.0]heptanes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 21, no. 15 (April 2015): 5714–17. https://doi.org/10.1002/chem.201500371.
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    • Timmerman, Jacob C., Bradley D. Robertson, and Ross A. Widenhoefer. “Gold-catalyzed intermolecular anti-markovnikov hydroamination of alkylidenecyclopropanes.” Angewandte Chemie (International Ed. in English) 54, no. 7 (February 2015): 2251–54. https://doi.org/10.1002/anie.201410871.
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    • Kean, Zachary S., Sergey Akbulatov, Yancong Tian, Ross A. Widenhoefer, Roman Boulatov, and Stephen L. Craig. “Photomechanical actuation of ligand geometry in enantioselective catalysis.” Angewandte Chemie (International Ed. in English) 53, no. 52 (December 2014): 14508–11. https://doi.org/10.1002/anie.201407494.
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    • Brooner, R. E. M., B. D. Robertson, and R. A. Widenhoefer. “Mechanism of 1,3-hydrogen migration in a gold bicyclo[3.2.0]heptene complex: The role of brønsted acid in the gold-catalyzed cycloisomerization of 7-aryl-1,6-enynes.” Organometallics 33, no. 22 (November 24, 2014): 6466–73. https://doi.org/10.1021/om500815k.
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    • Lee, S. D., J. C. Timmerman, and R. A. Widenhoefer. “Enantioselective intramolecular hydroamination of unactivated alkenes catalyzed by mono- and bis(gold) phosphine complexes.” Advanced Synthesis and Catalysis 356, no. 14–15 (October 1, 2014): 3187–92. https://doi.org/10.1002/adsc.201400268.
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    • Harris, Robert J., Kohki Nakafuku, and Ross A. Widenhoefer. “Kinetics and mechanism of the racemization of aryl allenes catalyzed by cationic gold(I) phosphine complexes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 20, no. 38 (September 2014): 12245–54. https://doi.org/10.1002/chem.201402729.
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    • Harris, Robert J., and Ross A. Widenhoefer. “Synthesis, structure, and reactivity of a gold carbenoid complex that lacks heteroatom stabilization.” Angewandte Chemie (International Ed. in English) 53, no. 35 (August 2014): 9369–71. https://doi.org/10.1002/anie.201404882.
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    • Brown, T. J., B. D. Robertson, and R. A. Widenhoefer. “Synthesis and X-ray crystal structure of a cationic gold (I) π-(1,3-diene) complex generated via isomerization of a gold π-allene complex.” Journal of Organometallic Chemistry 758 (May 15, 2014): 25–28. https://doi.org/10.1016/j.jorganchem.2014.01.030.
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    • Brooner, Rachel E. M., and Ross A. Widenhoefer. “Experimental evaluation of the electron donor ability of a gold phosphine fragment in a gold carbene complex.” Chemical Communications (Cambridge, England) 50, no. 19 (March 2014): 2420–23. https://doi.org/10.1039/c3cc48869a.
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    • Brown, T. J., B. D. Robertson, and R. A. Widenhoefer. “Synthesis and X-ray crystal structure of a cationic gold (I) π-(1,3-diene) complex generated via isomerization of a gold π-allene complex.” Journal of Organometallic Chemistry 758 (2014): 25–28.
    • Brooner, Rachel E. M., and Ross A. Widenhoefer. “Cationic, two-coordinate gold π complexes.” Angewandte Chemie (International Ed. in English) 52, no. 45 (November 2013): 11714–24. https://doi.org/10.1002/anie.201303468.
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    • Brooner, Rachel E. M., Timothy J. Brown, and Ross A. Widenhoefer. “Synthesis and study of cationic, two-coordinate triphenylphosphine-gold-π complexes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 19, no. 25 (June 2013): 8276–84. https://doi.org/10.1002/chem.201204564.
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    • Brooner, Rachel E. M., Timothy J. Brown, and Ross A. Widenhoefer. “Direct observation of a cationic gold(I)-bicyclo[3.2.0]hept-1(7)-ene complex generated in the cycloisomerization of a 7-phenyl-1,6-enyne.” Angewandte Chemie (International Ed. in English) 52, no. 24 (June 2013): 6259–61. https://doi.org/10.1002/anie.201301640.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “The regio- and stereospecific intermolecular dehydrative alkoxylation of allylic alcohols catalyzed by a gold(I) N-heterocyclic carbene complex.” Chemistry (Weinheim an Der Bergstrasse, Germany) 19, no. 10 (March 2013): 3437–44. https://doi.org/10.1002/chem.201203987.
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    • Brown, Timothy J., Dieter Weber, Michel R. Gagné, and Ross A. Widenhoefer. “Mechanistic analysis of gold(I)-catalyzed intramolecular allene hydroalkoxylation reveals an off-cycle bis(gold) vinyl species and reversible C-O bond formation.” Journal of the American Chemical Society 134, no. 22 (June 2012): 9134–37. https://doi.org/10.1021/ja303844h.
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    • Brown, Timothy J., Atsushi Sugie, Marina G. D. Leed, and Ross A. Widenhoefer. “Structures and dynamic solution behavior of cationic, two-coordinate gold(I)-π-allene complexes.” Chemistry (Weinheim an Der Bergstrasse, Germany) 18, no. 22 (May 2012): 6959–71. https://doi.org/10.1002/chem.201103289.
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    • Butler, Kristina L., Michele Tragni, and Ross A. Widenhoefer. “Gold(I)-catalyzed stereoconvergent, intermolecular enantioselective hydroamination of allenes.” Angewandte Chemie (International Ed. in English) 51, no. 21 (May 2012): 5175–78. https://doi.org/10.1002/anie.201201584.
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    • Brooner, R. E. M., and R. A. Widenhoefer. “Erratum: Syntheses, X-ray crystal structures, and solution behavior of cationic, two-coordinate gold(I) η ²-diene complexes (Organometallics (2011)).” Organometallics 31, no. 8 (April 23, 2012): 3456. https://doi.org/10.1021/om300224f.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “Gold(I)-catalyzed enantioselective intramolecular dehydrative amination of allylic alcohols with carbamates.” Angewandte Chemie (International Ed. in English) 51, no. 6 (February 2012): 1405–7. https://doi.org/10.1002/anie.201107877.
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    • Brooner, R. E. M., and R. A. Widenhoefer. “Synthesis and structure of dicationic, bis(gold) φ-alkene complexes containing a 2,2-bis(phosphino)biphenyl ligand.” Organometallics 31, no. 2 (January 23, 2012): 768–71. https://doi.org/10.1021/om200948z.
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    • Brown, T. J., and R. A. Widenhoefer. “Cationic gold(I) π-complexes of terminal alkynes and their conversion to dinuclear σ,π-acetylide complexes.” Organometallics 30, no. 21 (November 14, 2011): 6003–9. https://doi.org/10.1021/om200840g.
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    • Brooner, Rachel E McKinney, and Ross A. Widenhoefer. “Stereochemistry and mechanism of the Brønsted acid catalyzed intramolecular hydrofunctionalization of an unactivated cyclic alkene.” Chemistry (Weinheim an Der Bergstrasse, Germany) 17, no. 22 (May 2011): 6170–78. https://doi.org/10.1002/chem.201003128.
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    • Li, Hao, Feijie Song, and Ross A. Widenhoefer. “Gold(I)-Catalyzed Intramolecular Hydroamination of N-Allylic,N'-Aryl Ureas to form Imidazolidin-2-ones.” Advanced Synthesis & Catalysis 353, no. 6 (April 2011): 955–62. https://doi.org/10.1002/adsc.201000844.
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    • Brown, Timothy J., and Ross A. Widenhoefer. “Synthesis and equilibrium binding studies of cationic, two-coordinate gold(I) π-alkyne complexes.” Journal of Organometallic Chemistry 696, no. 6 (March 2011). https://doi.org/10.1016/j.jorganchem.2010.09.055.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular amination of allylic alcohols with alkylamines.” Organic Letters 13, no. 6 (March 2011): 1334–37. https://doi.org/10.1021/ol103175w.
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    • Brooner, R. E. M., and R. A. Widenhoefer. “Syntheses, x-ray crystal structures, and solution behavior of cationic, two-coordinate gold(I) η²-diene complexes.” Organometallics 30, no. 11 (2011): 3182–93. https://doi.org/10.1021/om200291s.
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    • Li, Hao, Seong Du Lee, and Ross A. Widenhoefer. “Gold(I)-Catalyzed Enantioselective Intramolecular Hydroamination of Allenes with Ureas.” Journal of Organometallic Chemistry 696, no. 1 (January 2011): 316–20. https://doi.org/10.1016/j.jorganchem.2010.09.045.
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    • Brown, T. J., A. Sugie, M. G. Dickens, and R. A. Widenhoefer. “Solid-state and dynamic solution behavior of a cationic, two-coordinate gold(I) π-allene complex.” Organometallics 29, no. 19 (October 11, 2010): 4207–9. https://doi.org/10.1021/om100688t.
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    • Widenhoefer, R. A., and F. Song. “Gold-Catalyzed Addition of Oxygen Nucleophiles to C-C Multiple Bonds,” October 11, 2010, 462–92. https://doi.org/10.1002/9783527633388.ch12.
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    • Widenhoefer, R. A., and F. Song. “Gold-Catalyzed Addition of Nitrogen and Sulfur Nucleophiles to C-C Multiple Bonds,” October 11, 2010, 437–61. https://doi.org/10.1002/9783527633388.ch11.
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    • Li, Hao, and Ross A. Widenhoefer. “Intramolecular Diamination and Alkoxyamination of Alkenes with N-Sulfonyl Ureas With N-Iodosuccinimide.” Tetrahedron 66, no. 26 (June 2010): 4827–31. https://doi.org/10.1016/j.tet.2010.03.082.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “Gold(I)-catalyzed amination of allylic alcohols with cyclic ureas and related nucleophiles.” Organic Letters 12, no. 6 (March 2010): 1184–87. https://doi.org/10.1021/ol902923e.
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    • Toups, Kristina L., and Ross A. Widenhoefer. “Platinum(II)-catalyzed intermolecular hydroamination of monosubstituted allenes with secondary alkylamines.” Chemical Communications (Cambridge, England) 46, no. 10 (March 2010): 1712–14. https://doi.org/10.1039/b925859k.
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    • Duncan, Alethea N., and Ross A. Widenhoefer. “Gold(I)-Catalyzed Intermolecular Hydroamination of Allenes with Arylamines.” Synlett : Accounts and Rapid Communications in Synthetic Organic Chemistry 2010, no. 3 (February 2010): 419–22. https://doi.org/10.1055/s-0029-1218555.
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    • Brown, Timothy J., Marina G. Dickens, and Ross A. Widenhoefer. “Syntheses and X-ray crystal structures of cationic, two-coordinate gold(I) pi-alkene complexes that contain a sterically hindered o-biphenylphosphine ligand.” Chemical Communications (Cambridge, England), no. 42 (November 2009): 6451–53. https://doi.org/10.1039/b914632f.
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    • Widenhoefer, R. A. “Unactivated Alkenes,” September 16, 2009, 203–22. https://doi.org/10.1002/9783527626977.ch6.
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    • Li, Hao, and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular dihydroamination of allenes with N,N'-disubstituted ureas to form bicyclic imidazolidin-2-ones.” Organic Letters 11, no. 12 (June 2009): 2671–74. https://doi.org/10.1021/ol900730w.
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    • Brown, Timothy J., Marina G. Dickens, and Ross A. Widenhoefer. “Syntheses, X-ray crystal structures, and solution behavior of monomeric, cationic, two-coordinate gold(I) pi-alkene complexes.” Journal of the American Chemical Society 131, no. 18 (May 2009): 6350–51. https://doi.org/10.1021/ja9015827.
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    • Zhang, Zhibin, Seong Du Lee, and Ross A. Widenhoefer. “Intermolecular hydroamination of ethylene and 1-alkenes with cyclic ureas catalyzed by achiral and chiral gold(I) complexes.” Journal of the American Chemical Society 131, no. 15 (April 2009): 5372–73. https://doi.org/10.1021/ja9001162.
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    • Toups, Kristina L., Gordon T. Liu, and Ross A. Widenhoefer. “Gold(I)-Catalyzed Hydroarylation of Allenes with Indoles.” Journal of Organometallic Chemistry 694, no. 4 (February 2009): 571–75. https://doi.org/10.1016/j.jorganchem.2008.11.058.
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    • Zhang, Zhibin, Seong Du Lee, Aaron S. Fisher, and Ross A. Widenhoefer. “Gold(I)-Catalyzed Hydration of Allenes.” Tetrahedron 65, no. 9 (February 2009): 1794–98. https://doi.org/10.1016/j.tet.2008.10.113.
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    • Toups, K. L., G. T. Liu, and R. A. Widenhoefer. “(I)-Catalyzed Hydroarylation of Allenes with 1,2-Dimethylindole.” Organomet. Chem., no. 694 (2009): 571–75.
    • Widenhoefer, Ross A. “A palladium-catalyzed formal (4+1) annulation: a new approach to cyclopentene construction.” Angewandte Chemie (International Ed. in English) 48, no. 38 (January 2009): 6950–52. https://doi.org/10.1002/anie.200902404.
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    • Kinder, Robert E., Zhibin Zhang, and Ross A. Widenhoefer. “Intermolecular hydroamination of allenes with N-unsubstituted carbamates catalyzed by a gold(I) N-heterocyclic carbene complex.” Organic Letters 10, no. 14 (July 2008): 3157–59. https://doi.org/10.1021/ol8010858.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular hydroamination of unactivated C==C bonds with alkyl ammonium salts.” Chemical Communications (Cambridge, England), no. 24 (June 2008): 2741–43. https://doi.org/10.1039/b804081h.
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    • Bender, C. F., W. B. Hudson, and R. A. Widenhoefer. “Sterically hindered mono(phosphines) as supporting ligands for the platinum-catalyzed hydroamination of amino alkenes.” Organometallics 27, no. 10 (May 26, 2008): 2356–58. https://doi.org/10.1021/om8000982.
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    • Zhang, Zhibin, and Ross A. Widenhoefer. “Regio- and stereoselective synthesis of alkyl allylic ethers via gold(I)-catalyzed intermolecular hydroalkoxylation of allenes with alcohols.” Organic Letters 10, no. 10 (May 2008): 2079–81. https://doi.org/10.1021/ol800646h.
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    • Widenhoefer, Ross A. “Recent developments in enantioselective gold(I) catalysis.” Chemistry (Weinheim an Der Bergstrasse, Germany) 14, no. 18 (January 2008): 5382–91. https://doi.org/10.1002/chem.200800219.
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    • Zhang, Zhibin, Christopher F. Bender, and Ross A. Widenhoefer. “Gold(I)-catalyzed dynamic kinetic enantioselective intramolecular hydroamination of allenes.” Journal of the American Chemical Society 129, no. 46 (November 2007): 14148–49. https://doi.org/10.1021/ja0760731.
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    • Liu, Cong, Christopher F. Bender, Xiaoqing Han, and Ross A. Widenhoefer. “Platinum-catalyzed hydrofunctionalization of unactivated alkenes with carbon, nitrogen and oxygen nucleophiles.” Chemical Communications (Cambridge, England), no. 35 (September 2007): 3607–18. https://doi.org/10.1039/b615698c.
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    • Han, X., and R. A. Widenhoefer. “Palladium-mediated cyclization of 6-methyl-1-phenyl-6-hepten-2-one to form 3-methyldiphenylmethane: Carbonyl activation by a neutral palladium(II) complex.” Organometallics 26, no. 16 (July 30, 2007): 4061–65. https://doi.org/10.1021/om700379g.
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    • Zhang, Zhibin, Christopher F. Bender, and Ross A. Widenhoefer. “Gold(I)-catalyzed enantioselective hydroamination of N-allenyl carbamates.” Organic Letters 9, no. 15 (July 2007): 2887–89. https://doi.org/10.1021/ol071108n.
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    • Liu, Cong, and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular enantioselective hydroarylation of allenes with indoles.” Organic Letters 9, no. 10 (May 2007): 1935–38. https://doi.org/10.1021/ol070483c.
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    • Zhang, Z., and R. A. Widenhoefer. “Gold(I)-Catalyzed Intramolecular Asymmetric Hydroalkoxylation of Allenes.” Angew. Chem., no. 119 (2007): 287–89.
    • Zhang, Zhibin, and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular enantioselective hydroalkoxylation of allenes.” Angewandte Chemie (International Ed. in English) 46, no. 1–2 (January 2007): 283–85. https://doi.org/10.1002/anie.200603260.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “Room temperature hydroamination of N-alkenyl ureas catalyzed by a gold(i) N-heterocyclic carbene complex.” Organic Letters 8, no. 23 (November 2006): 5303–5. https://doi.org/10.1021/ol062107i.
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    • Widenhoefer, R. A., and X. Han. “Gold-catalyzed hydroamination of C-C multiple bonds.” European Journal of Organic Chemistry, no. 20 (October 13, 2006): 4555–63. https://doi.org/10.1002/ejoc.200600399.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular hydroamination of unactivated alkenes with carboxamides.” Chemical Communications (Cambridge, England), no. 39 (October 2006): 4143–44. https://doi.org/10.1039/b608638a.
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    • Zhang, Zhibin, Xiang Wang, and Ross A. Widenhoefer. “Platinum(II)-catalyzed intermolecular hydroarylation of unactivated alkenes with indoles.” Chemical Communications (Cambridge, England), no. 35 (September 2006): 3717–19. https://doi.org/10.1039/b607286k.
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    • Han, Xiaoqing, and Ross A. Widenhoefer. “Platinum-catalyzed intramolecular asymmetric hydroarylation of unactivated alkenes with indoles.” Organic Letters 8, no. 17 (August 2006): 3801–4. https://doi.org/10.1021/ol061441b.
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    • Zhang, Zhibin, Cong Liu, Robert E. Kinder, Xiaoqing Han, Hua Qian, and Ross A. Widenhoefer. “Highly active Au(I) catalyst for the intramolecular exo-hydrofunctionalization of allenes with carbon, nitrogen, and oxygen nucleophiles.” Journal of the American Chemical Society 128, no. 28 (July 2006): 9066–73. https://doi.org/10.1021/ja062045r.
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    • Kinder, Robert E., and Ross A. Widenhoefer. “Rhodium-catalyzed asymmetric cyclization/hydroboration of 1,6-enynes.” Organic Letters 8, no. 10 (May 2006): 1967–69. https://doi.org/10.1021/ol052986t.
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    • Han, Xiaoqing, and Ross A. Widenhoefer. “Gold(I)-catalyzed intramolecular hydroamination of alkenyl carbamates.” Angewandte Chemie (International Ed. in English) 45, no. 11 (March 2006): 1747–49. https://doi.org/10.1002/anie.200600052.
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    • Liu, Cong, and Ross A. Widenhoefer. “Scope and mechanism of the Pd(II)-catalyzed arylation/carboalkoxylation of unactivated olefins with indoles.” Chemistry (Weinheim an Der Bergstrasse, Germany) 12, no. 8 (March 2006): 2371–82. https://doi.org/10.1002/chem.200500787.
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    • Qian, Hua, and Ross A. Widenhoefer. “Platinum-catalyzed intermolecular hydroamination of vinyl arenes with carboxamides.” Organic Letters 7, no. 13 (June 2005): 2635–38. https://doi.org/10.1021/ol050745f.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “Platinum-catalyzed intramolecular hydroamination of unactivated olefins with secondary alkylamines.” Journal of the American Chemical Society 127, no. 4 (February 2005): 1070–71. https://doi.org/10.1021/ja043278q.
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    • Qian, H., T. Pei, and R. A. Widenhoefer. “Development, scope, and mechanism of the palladium-catalyzed intramolecular hydroalkylation of 3-butenyl β-diketones.” Organometallics 24, no. 2 (January 17, 2005): 287–301. https://doi.org/10.1021/om049373p.
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    • Liu, C., and R. A. Widenhoefer. “Platinum(II)/europium(III)-catalyzed intramolecular hydroalkylation of 4-pentenyl β-dicarbonyl compounds.” Tetrahedron Letters 46, no. 2 (January 10, 2005): 285–87. https://doi.org/10.1016/j.tetlet.2004.11.060.
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    • Han, Xiaoqing, Xiang Wang, Tao Pei, and Ross A. Widenhoefer. “Palladium-catalyzed intramolecular hydroalkylation of alkenyl-beta-keto esters, alpha-aryl ketones, and alkyl ketones in the presence of Me3SiCl or HCl.” Chemistry (Weinheim an Der Bergstrasse, Germany) 10, no. 24 (December 2004): 6333–42. https://doi.org/10.1002/chem.200400459.
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    • Liu, Cong, Xiang Wang, Tao Pei, and Ross A. Widenhoefer. “Palladium-catalyzed intramolecular oxidative alkylation of 4-pentenyl beta-dicarbonyl compounds.” Chemistry (Weinheim an Der Bergstrasse, Germany) 10, no. 24 (December 2004): 6343–52. https://doi.org/10.1002/chem.200400460.
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    • Goj, L. A., G. A. Cisneros, W. Yang, and R. A. Widenhoefer. “Erratum: "Dramatic effect of homoallylic substitution on the rate of palladium-catalyzed diene cycloisomerization" (Journal of Organometallic Chemistry (2003) vol. 687 (498-507) 10.1016/j.jorganchem.2003.09.046).” Journal of Organometallic Chemistry 689, no. 17 (September 1, 2004): 2845. https://doi.org/10.1016/j.jorganchem.2004.06.001.
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    • Liu, C., X. Han, X. Wang, and R. A. Widenhoefer. “Erratum: Platinum-catalyzed intramolecular alkylation of indoles with unactivated olefins (Journal of the American Chemical Society (2004) 126 (3700-3701)).” Journal of the American Chemical Society 126, no. 33 (August 25, 2004): 10493. https://doi.org/10.1021/ja0470362.
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    • Liu, Cong, and Ross A. Widenhoefer. “Palladium-catalyzed cyclization/carboalkoxylation of alkenyl indoles.” Journal of the American Chemical Society 126, no. 33 (August 2004): 10250–51. https://doi.org/10.1021/ja046810i.
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    • Qian, Hua, Xiaoqing Han, and Ross A. Widenhoefer. “Platinum-catalyzed intramolecular hydroalkoxylation of gamma- and delta-hydroxy olefins to form cyclic ethers.” Journal of the American Chemical Society 126, no. 31 (August 2004): 9536–37. https://doi.org/10.1021/ja0477773.
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    • Perch, Nicholas S., and Ross A. Widenhoefer. “Mechanism of palladium-catalyzed diene cyclization/hydrosilylation: direct observation of intramolecular carbometalation.” Journal of the American Chemical Society 126, no. 20 (May 2004): 6332–46. https://doi.org/10.1021/ja049806f.
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    • Wang, X., and R. A. Widenhoefer. “Platinum-Catalyzed Intermolecular Hydroamination of Unactivated Olefins with Carboxamides.” Organometallics 23, no. 8 (April 12, 2004): 1649–51. https://doi.org/10.1021/om0498549.
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    • Han, Xiaoqing, and Ross A. Widenhoefer. “Palladium-catalyzed oxidative alkoxylation of alpha-alkenyl beta-diketones to form functionalized furans.” The Journal of Organic Chemistry 69, no. 5 (March 2004): 1738–40. https://doi.org/10.1021/jo035576w.
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    • Liu, Cong, Xiaoqing Han, Xiang Wang, and Ross A. Widenhoefer. “Platinum-catalyzed intramolecular alkylation of indoles with unactivated olefins.” Journal of the American Chemical Society 126, no. 12 (March 2004): 3700–3701. https://doi.org/10.1021/ja031814t.
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    • Wang, Xiang, and Ross A. Widenhoefer. “Palladium(II)- and platinum(II)-catalyzed addition of stabilized carbon nucleophiles to ethylene and propylene.” Chemical Communications (Cambridge, England), no. 6 (March 2004): 660–61. https://doi.org/10.1039/b316734h.
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    • Han, X., X. Wang, T. Pei, and R. A. Widenhoefer. “"Palladium-Catalyzed Intramolecular Hydroalkylation of Alkenyl - β - Keto Esters, -Aryl Ketones, and Alkyl Ketones in the presence of Me3SiCl or HCI".” Chem. Eur J. 10 (2004): 6332–42.
    • Liu, C., and R. A. Widenhoefer. “Palladium-Catalyzed Cyclization/Carboalkoxylation of Alkenyl Indoles,.” J. Am. Chem. Soc. 126 (2004): 10246–47.
    • Widenhoefer, R. A. “Palladium-catalyzed alkylation of unactivated olefins.” Pure and Applied Chemistry 76, no. 3 (January 1, 2004): 671–78. https://doi.org/10.1351/pac200476030671.
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    • Goj, L. A., G. A. Cisneros, W. Yang, and R. A. Widenhoefer. “Dramatic effect of homoallylic substitution on the rate of palladium-catalyzed diene cycloisomerization.” Journal of Organometallic Chemistry 687, no. 2 (December 7, 2003): 498–507. https://doi.org/10.1016/j.jorganchem.2003.09.046.
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    • Wang, Xiang, Tao Pei, Xiaoqing Han, and Ross A. Widenhoefer. “Palladium-catalyzed intramolecular hydroalkylation of unactivated olefins with dialkyl ketones.” Organic Letters 5, no. 15 (July 2003): 2699–2701. https://doi.org/10.1021/ol034879+.
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    • Qian, Hua, and Ross A. Widenhoefer. “Mechanism of the palladium-catalyzed intramolecular hydroalkylation of 7-octene-2,4-dione.” Journal of the American Chemical Society 125, no. 8 (February 2003): 2056–57. https://doi.org/10.1021/ja0293002.
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    • Chakrapani, Harinath, Cong Liu, and Ross A. Widenhoefer. “Enantioselective cyclization/hydrosilylation of 1,6-enynes catalyzed by a cationic rhodium bis(phosphine) complex.” Organic Letters 5, no. 2 (January 2003): 157–59. https://doi.org/10.1021/ol027196n.
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    • Pei, Tao, Xiang Wang, and Ross A. Widenhoefer. “Palladium-catalyzed intramolecular oxidative alkylation of unactivated olefins.” Journal of the American Chemical Society 125, no. 3 (January 2003): 648–49. https://doi.org/10.1021/ja026317b.
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    • Liu, G., and R. A. Widenhoefer. “Cyclization/hydrosilylation of functionalized diynes catalyzed by a cationic rhodium bis(phosphine) complex.” Organometallics 21, no. 25 (December 9, 2002): 5666–73. https://doi.org/10.1021/om020643i.
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    • Widenhoefer, Ross A. “Synthetic and mechanistic studies of the cycloisomerization and cyclization/hydrosilylation of functionalized dienes catalyzed by cationic palladium(II) complexes.” Accounts of Chemical Research 35, no. 10 (October 2002): 905–13. https://doi.org/10.1021/ar010040n.
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    • Wang, Xiang, Harinath Chakrapani, James W. Madine, Michele A. Keyerleber, and Ross A. Widenhoefer. “Cyclization/hydrosilylation of functionalized 1,6-diynes catalyzed by cationic platinum complexes containing bidentate nitrogen ligands.” The Journal of Organic Chemistry 67, no. 9 (May 2002): 2778–88. https://doi.org/10.1021/jo015986p.
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    • Wang, X., S. Z. Stankovich, and R. A. Widenhoefer. “Palladium-catalyzed ring-opening cyclization/hydrosilylation of 1-cyclopropyl-1,6-heptadienes to form (E)-1-butenyl cyclopentanes.” Organometallics 21, no. 5 (March 4, 2002): 901–5. https://doi.org/10.1021/om010907l.
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    • Pei, Tao, and Ross A. Widenhoefer. “Palladium-catalyzed cyclization of alkenyl beta-keto esters in the presence of chlorotrimethylsilane.” Chemical Communications (Cambridge, England), no. 6 (March 2002): 650–51. https://doi.org/10.1039/b111644d.
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    • Perch, N. S., and R. A. Widenhoefer. “Direct observation of the conversion of a palladium 5-hexenyl chelate complex to a palladium cyclopentylmethyl complex.” Organometallics 20, no. 25 (December 10, 2001): 5251–53. https://doi.org/10.1021/om010876u.
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    • Goj, L. A., and R. A. Widenhoefer. “Mechanistic studies of the cycloisomerization of dimethyl diallylmalonate catalyzed by a cationic palladium phenanthroline complex.” Journal of the American Chemical Society 123, no. 45 (November 2001): 11133–47. https://doi.org/10.1021/ja0108685.
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    • Pei, T., and R. A. Widenhoefer. “Palladium-catalyzed asymmetric diene cyclization/hydrosilylation employing functionalized silanes and disiloxanes.” The Journal of Organic Chemistry 66, no. 23 (November 2001): 7639–45. https://doi.org/10.1021/jo015724n.
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    • Pei, T., and R. A. Widenhoefer. “Palladium-catalyzed intramolecular addition of 1,3-diones to unactivated olefins.” Journal of the American Chemical Society 123, no. 45 (November 2001): 11290–91. https://doi.org/10.1021/ja011764x.
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    • Wang, Xiang, Harinath Chakrapani, Carmine N. Stengone, and Ross A. Widenhoefer. “Synthesis of Carbobicyclic Compounds via Palladium-Catalyzed Cyclization/ Hydrosilylation:  Evidence for Reversible Silylpalladation.” The Journal of Organic Chemistry 66, no. 23 (November 2001): 7930–7930. https://doi.org/10.1021/jo015717z.
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    • Madine, James W., Xiang Wang, and Ross A. Widenhoefer. “Cyclization/Hydrosilylation of Functionalized Diynes Catalyzed by a Cationic Platinum Phenanthroline Complex.” Organic Letters 3, no. 10 (May 2001): 1591–92. https://doi.org/10.1021/ol0158819.
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    • Wang, X., H. Chakrapani, C. N. Stengone, and R. A. Widenhoefer. “Synthesis of carbobicyclic compounds via palladium-catalyzed cyclization/hydrosilylation: evidence for reversible silylpalladation.” The Journal of Organic Chemistry 66, no. 5 (March 2001): 1755–60. https://doi.org/10.1021/jo001438k.
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    • Madine, J. W., X. Wang, and R. A. Widenhoefer. “Cyclization/hydrosilylation of functionalized diynes catalyzed by a cationic platinum phenanthroline complex.” Organic Letters 3, no. 3 (February 2001): 385–88. https://doi.org/10.1021/ol006901u.
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    • Kisanga, P., L. A. Goj, and R. A. Widenhoefer. “Cycloisomerization of functionalized 1,5- and 1,6-dienes catalyzed by cationic palladium phenanthroline complexes.” The Journal of Organic Chemistry 66, no. 2 (January 2001): 635–37. https://doi.org/10.1021/jo001596b.
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    • Kisanga, P., and R. A. Widenhoefer. “Development, synthetic scope, and mechanistic studies of the palladium-catalyzed cycloisomerization of functionalized 1,6-dienes in the presence of silane.” Journal of the American Chemical Society 122, no. 41 (October 18, 2000): 10017–26. https://doi.org/10.1021/ja001730+.
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    • Pei, T., and R. A. Widenhoefer. “Asymmetric diene cyclization/hydrosilylation/oxidation employing 1-tert-butyl-3,3-dimethyl-1,1-diphenyldisiloxane.” Tetrahedron Letters 41, no. 40 (September 30, 2000): 7597–7600. https://doi.org/10.1016/S0040-4039(00)01321-6.
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    • Perch, N. S., T. Pei, and R. A. Widenhoefer. “Enantioselective diene Cyclization/Hydrosilylation catalyzed by optically active palladium bisoxazoline and pyridine-oxazoline complexes.” The Journal of Organic Chemistry 65, no. 12 (June 2000): 3836–45. https://doi.org/10.1021/jo0003192.
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    • Perch, Nicholas S., Philip Kisanga, and Ross A. Widenhoefer. “Reductive Cyclization of Dimethyl Diallylmalonate Catalyzed by Palladium−Bisoxazoline Complexes in the Presence of Silane and Water.” Organometallics 19, no. 13 (June 2000): 2541–45. https://doi.org/10.1021/om000251g.
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    • Pei, T., and R. A. Widenhoefer. “Use of pentamethyldisiloxane in the palladium-catalyzed cyclization/hydrosilylation of functionalized dienes.” Organic Letters 2, no. 10 (May 2000): 1469–71. https://doi.org/10.1021/ol005810u.
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    • Widenhoefer, R. A., and A. Vadehra. “An improved catalyst for the cyclization/hydrosilylation of functionalized 1,6-dienes employing dimethylphenylsilane.” Tetrahedron Letters 40, no. 49 (December 3, 1999): 8499–8502. https://doi.org/10.1016/S0040-4039(99)01706-2.
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    • Widenhoefer, R. A., and C. N. Stengone. “Cyclization/hydrosilylation of functionalized dienes catalyzed by a cationic palladium phenanthroline complex.” Journal of Organic Chemistry 64, no. 23 (November 12, 1999): 8681–92. https://doi.org/10.1021/jo9913006.
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    • Widenhoefer, R. A., A. Vadehra, and P. K. Cheruvu. “Cyclization/Hydrogermylation of Functionalized 1,6-Dienes Catalyzed by Cationic Palladium Complexes.” Organometallics 18, no. 22 (October 25, 1999): 4614–18. https://doi.org/10.1021/om990546y.
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    • Widenhoefer, R. A., and N. S. Perch. “Silane-promoted cycloisomerization of functionalized 1,6-dienes catalyzed by a cationic (π-allyl)palladium complex.” Organic Letters 1, no. 7 (October 7, 1999): 1103–5. https://doi.org/10.1021/ol9908981.
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    • Perch, N. S., and R. A. Widenhoefer. “Asymmetric cyclization/hydrosilylation of functionalized 1,6-dienes catalyzed by enantiomerically pure palladium pyridine-oxazoline complexes [13].” Journal of the American Chemical Society 121, no. 29 (July 28, 1999): 6960–61. https://doi.org/10.1021/ja990461o.
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    • Stengone, C. N., and R. A. Widenhoefer. “Cyclization/hydrosilylation of functionalized 1,7-dienes to form substituted six-membered carbocycles.” Tetrahedron Letters 40, no. 8 (February 19, 1999): 1451–54. https://doi.org/10.1016/S0040-4039(99)00022-2.
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    • Widenhoefer, R. A., and S. L. Buchwald. “Electronic dependence of C-O reductive elimination from palladium (aryl)neopentoxide complexes.” Journal of the American Chemical Society 120, no. 26 (July 8, 1998): 6504–11. https://doi.org/10.1021/ja9806581.
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    • Widenhoefer, Ross A., and Michael A. DeCarli. “Tandem Cyclization/Hydrosilylation of Functionalized 1,6-Dienes Catalyzed by a Cationic Palladium Complex.” Journal of the American Chemical Society 120, no. 15 (April 1998): 3805–6. https://doi.org/10.1021/ja980242n.
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    • Widenhoefer, R. A., B. Krzyzanowska, and G. Webb-Wood. “Palladium-catalyzed intramolecular hydrosilylation of alkenylsilanes: Selective formation of six-membered silicon heterocycles.” Organometallics 17, no. 23 (January 1, 1998): 5124–27. https://doi.org/10.1021/om980585u.
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    • Widenhoefer, R. A., H. A. Zhong, and S. L. Buchwald. “Direct observation of C-O reductive elimination from palladium aryl alkoxide complexes to form aryl ethers.” Journal of the American Chemical Society 119, no. 29 (July 23, 1997): 6787–95. https://doi.org/10.1021/ja963324p.
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    • Zhong, H. A., and R. A. Widenhoefer. “Kinetics and Mechanism of the Formation of Palladium Bis(benzylamine) Complexes from Reaction of Benzylamine with Palladium Tri-o-tolylphosphine Mono(amine) Complexes.” Inorganic Chemistry 36, no. 12 (January 1, 1997): 2610–16. https://doi.org/10.1021/ic961388v.
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    • Widenhoefer, R. A., and S. L. Buchwald. “Formation of palladium bis (amine) complexes from reaction of amine with palladium tris(o-tolyl)phosphine mono(amine) complexes.” Organometallics 15, no. 16 (August 6, 1996): 3534–42. https://doi.org/10.1021/om9603169.
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    • Widenhoefer, R. A., H. A. Zhong, and S. L. Buchwald. “Synthesis and solution structure of palladium tris(o-tolyl)phosphine mono(amine) complexes.” Organometallics 15, no. 12 (June 11, 1996): 2745–54. https://doi.org/10.1021/om9509599.
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    • Widenhoefer, R. A., and S. L. Buchwald. “Halide and amine influence in the equilibrium formation of palladium tris(o-tolyl)phosphine mono(amine) complexes from palladium aryl halide dimers.” Organometallics 15, no. 12 (June 11, 1996): 2755–63. https://doi.org/10.1021/om9509608.
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    • Casey, C. P., R. A. Widenhoefer, and R. K. Hayashi. “Reaction of Cp*3Co3(μ3-CCH3)(μ3-H) with (Trimethylsilyl)diazomethane and Ethyl Diazoacetate: Facile Hydrogen Transfer Forms the Diazenide Clusters Cp*3Co3(μ3-CCH3)(μ3-η¹-NNCH2SiMe3)and Cp*3Co3(μ3-CCH3)(μ3-η¹-NNCH2CO2CH2CH3).” Inorganic Chemistry 34, no. 8 (April 1, 1995): 2258–62. https://doi.org/10.1021/ic00112a045.
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    • Casey, C. P., R. A. Widenhoefer, and R. K. Hayashi. “Reactions of Cp*3Co3(μ2-H)3(μ3-H) with Carbon Dioxide, Carbon Disulfide, and Phenyl Isocyanate.” Inorganic Chemistry 34, no. 5 (March 1, 1995): 1138–44. https://doi.org/10.1021/ic00109a022.
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    • Casey, C. P., R. A. Widenhoefer, and R. K. Hayashi. “Reaction of Cp*₃Co₃(μ₃-CCH₃)(μ ₃-H) with (Trimethylsilyl)diazomethane and ethyl diazoacetate: Facile hydrogen transfer forms the diazenide clusters Cp*₃Co₃(μ₃-CCH₃)(μ ₃-η¹-NNCH₂SiMe₃) and Cp*₃ ...” Inorganic Chemistry 34, no. 8 (1995): 2258–62.
    • Casey, C. P., R. A. Widenhoefer, and R. K. Hayashi. “Reactions of Cp*₃Co₃(μ₂-H)₃(μ ₃-H) with carbon dioxide, carbon bisulfide, and phenyl isocyanate.” Inorganic Chemistry 34, no. 5 (1995): 1138–44.
    • Casey, C. P., S. L. Hallenbeck, and R. A. Widenhoefer. “Kinetics and Mechanism of the Formation of the Bis(ethylidyne) Tricobalt Cluster Cp*3Co3(μ3-CCH3)2 from Reaction of Acetylene with Cp*3Co3(μ2-H)3(μ3-H).” Journal of the American Chemical Society 117, no. 16 (January 1, 1995): 4607–22. https://doi.org/10.1021/ja00121a018.
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    • Casey, C. P., S. L. Hallenbeck, and R. A. Widenhoefer. “Kinetics and mechanism of the formation of the bis(ethylidyne) tricobalt cluster Cp*₃Co₃(μ₃-CCH₃) ₂ from reaction of acetylene with Cp*₃Co₃(μ₂-H)₃(μ ₃-H).” Journal of the American Chemical Society 117, no. 16 (1995): 4607–22.
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, and J. A. Gavney. “Syntheses, X-ray Crystal Structures, and Fluxional Behavior of the Clusters Cp*3Co3(μ2-CO)(μ3-CO)(μ-H)2, Cp*3Co3(μ2-H)(μ3-η²-HC=NCMe3), and Cp*3Co3(μ2-H)(μ3-η²-HC=NCMe2CH2Me).” Organometallics 13, no. 12 (December 1, 1994): 4720–31. https://doi.org/10.1021/om00024a018.
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    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, and R. K. Hayashi. “Syntheses and X-ray Crystal Structures of the Tricobalt Mono(ethylidyne) Clusters Cp*3Co3(µ3-CCH3)(µ3-CO)(µ2-H), Cp*3Co3(µ3-CCH3)(µ3-CNCMe3)(µ2-H), and Cp*3Co3(µ3-CCH3)(µ3-NO).” Inorganic Chemistry 33, no. 12 (June 1, 1994): 2639–44. https://doi.org/10.1021/ic00090a027.
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    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, D. R. Powell, and G. W. Smith. “X-ray Crystal Structures of Two (Ethylidyne)tricobalt Clusters: Thermolysis of Cp*Co(H2C=CH2)2 Produces Cp*3Co3(μ3-CCH3)(μ3-H), Not Cp*3Co3(μ3-CCH3)2.” Organometallics 13, no. 4 (April 1, 1994): 1521–24. https://doi.org/10.1021/om00016a065.
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    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, D. R. Powell, and G. W. Smith. “Xpray Crystal Structures of two Ethylidyne Tricobalt Clusters: Thermolysis of cp*Co(H2C=CH2)2 Froms Cp*3Co3(μ3-CCH3)(μ3-H), not Cp*3Co3(μ3-CCH3)2.” Organometallics 13 (1994).
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, D. R. Powell, and G. W. Smith. “X-ray crystal structures of two (ethylidyne)tricobalt clusters. Thermolysis of Cp*Co(H₂C=CH₂)₂ Produces Cp*₃Co₃(μ₃CCH₃ (μ₃-H), not Cp*₃Co₃(μ₃-CCH₃)₂.” Organometallics 13, no. 4 (1994): 1521–24.
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, and J. A. Gavney. “Synthesis, X-ray Crystal Structures and Fluxional Behavior of the Tricobalt Clusters Cp*3C03(μ3-CO)(μ2-CO)(μ-H)2, Cp*3Co3(μ2-H)(μ3-η2-HC=NCMe2CH2Me).” Organometallics 13 (1994).
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, R. K. Hayashi, and J. A. Gavney. “Syntheses, X-ray crystal structures, and fluxional behavior of the clusters Cp*₃Co₃(μ₂CO)(μ₃-CO)(μ-H)₂, Cp*₃Co₃(μ₂-H) (μ₃-η²-HC=NCMe₃), and Cp*₃Co₃(μ₂-H).” Organometallics 13, no. 12 (1994): 4720–31.
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, and R. K. Hayashi. “Synthesis and X-ray Crystal Structures of the Tricoblat Mono(ethylidyne) Clusters Cp*3Co3(μ3-CCH3)(μ3-CO)(μ2-H), Cp*3Co3(μ3-CCH3)(μ3-CO)(μ2-H), Cp*3Co3(μ3-CCH3)(μ3-CNCMe3)(μ2-H), and Cp*3Co3(μ3-CCH3)(μ3NO).” Inorg. Chem. 33 (1994).
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, and R. K. Hayashi. “Syntheses and X-ray crystal structures of the tricobalt mono(ethylidyne) clusters Cp*₃Co₃(μ₃-CCH₃)(μ ₃-CO)(μ₂-H), Cp*₃Co₃(μ₃-CCH₃)(μ ₃-CNCMe₃)(μ₂-H), and Cp*₃Co₃(μ₃-CCH₃)(μ ₃-NO).” Inorganic Chemistry 33, no. 12 (1994): 2639–44.
    • Casey, C. P., R. A. Widenhoefer, S. L. Hallenbeck, and J. A. Gavney. “Reaction of CO and tert-butyl isocyanide with the cluster [(C 5Me5)3Co3(μ2-H) 3(μ3-H)] facile hydrogen transfer to isocyanide forms [(C5Me5)3Co3 (μ-H) (μ3-η²-HC=NCMe3)].” Journal of the Chemical Society, Chemical Communications, no. 22 (December 1, 1993): 1692–94. https://doi.org/10.1039/C39930001692.
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    • Casey, C. P., R. A. Widenhoefer, and R. K. Hayashi. “Reaction of NO with Cp*3Co3(μ-H)4 preserves the tricobalt cluster and produces Cp*3Co3(μ3-NO)2.” Inorganica Chimica Acta 212, no. 1–2 (January 1, 1993): 81–85. https://doi.org/10.1016/S0020-1693(00)92312-0.
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    • Casey, C. P., R. A. Widenhoefer, and S. L. Hallenbeck. “Conversion of Acetylene to a Triple Bridged Ethylidyne Ligand on the Cluster Cp*3Co3(μ2-H)3(μ3-H).” Organometallics 12, no. 10 (January 1, 1993): 3788–89. https://doi.org/10.1021/om00034a002.
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    • Casey, C. P., R. A. Widenhoefer, and S. L. Hallenbeck. “Conversion of acetylene to a triple bridged ethylidyne ligand on the cluster Cp*₃Co₃(μ₂-H)₃(μ ₃-H).” Organometallics 12, no. 10 (1993): 3788–89.
    • Casey, C., R. Widenhoefer, S. Hallenbeck, and J. Gavney. “Reaction of CO and tert-Butyl Isocyanide with the Cluster Cp*3Co3(μ2-H)3(μ3-H): Facile Hydrogen Transfer to Isocyanide Forms Cp*3Co3(μ2-H)(μ3-η2-HC=NCMe3).” J. Chem. Soc., Chem. Commun., 1993.
    • Casey, C. P., R. A. Widenhoefer, and J. M. O’Connor. “Phosphine induced cyclopentadienyl ring slippage catalyzes CO insertion into a methyl rhenium compound to produce an acetyl rhenium compound.” Journal of Organometallic Chemistry 428, no. 1–2 (April 28, 1992): 99–105. https://doi.org/10.1016/0022-328X(92)83222-4.
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    • Kersten, J. L., A. L. Rheingold, K. H. Theopold, C. P. Casey, R. A. Widenhoefer, and C. E. C. A. Hop. “'[Cp*Co=CoCp*]' is a Hydride.” Angew. Chem. 104 (1992).
    • Kersten, J. L., A. L. Rheingold, K. H. Theopold, C. P. Casey, R. A. Widenhoefer, and C. E. C. A. Hop. ““[Cp^*CoCoCp^*]” is a Hydride.” Angewandte Chemie International Edition in English 31, no. 10 (January 1, 1992): 1341–43. https://doi.org/10.1002/anie.199213411.
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  • Book Sections

    • Widenhoefer, R. A., and C. F. Bender. “Silane-initiated carbocyclization catalyzed by transition metal complexes.” In Comprehensive Organometallic Chemistry III, 11:367–410, 2007.

  • Conference Papers

    • Brooner, Rachel E. M., and Ross A. Widenhoefer. “Synthesis and solution behavior of cationic, two-coordinate gold(I) p-complexes bearing a triphenylphosphine ligand.” In Abstracts of Papers of the American Chemical Society, Vol. 244. AMER CHEMICAL SOC, 2012.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “Gold(I)-catalyzed enantioselective intramolecular dehydrative amination of allylic alcohols with carbamates.” In Abstracts of Papers of the American Chemical Society, Vol. 244, 2012.
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    • Widenhoefer, Ross A. “Cationic, two-coordinate gold p-complexes containing an N-heterocyclic carbene ligand.” In Abstracts of Papers of the American Chemical Society, Vol. 244. AMER CHEMICAL SOC, 2012.
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    • Brown, Timothy J., Atsushi Sugie, and Ross A. Widenhoefer. “Cationic, two-coordinate gold(I) P -allene complexes: Syntheses, X-ray crystal structures, and dynamic solution behavior.” In Abstracts of Papers of the American Chemical Society, Vol. 242. AMER CHEMICAL SOC, 2011.
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    • Brown, Timothy J., and Ross A. Widenhoefer. “Dinuclear gold(I) s,P -acetylide complex formation via gold(I) P -alkyne complexes: Kinetics and mechanism.” In Abstracts of Papers of the American Chemical Society, Vol. 242. AMER CHEMICAL SOC, 2011.
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    • Butler, Kristina L., and Ross A. Widenhoefer. “Platinum(II)-catalyzed intermolecular hydroamination of allenes.” In Abstracts of Papers of the American Chemical Society, Vol. 242. AMER CHEMICAL SOC, 2011.
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    • Lee, Seong Du, and Ross A. Widenhoefer. “Gold(I)-catalyzed enantioselective intermolecular hydroamination of unactivated 1-alkenes with cyclic ureas.” In Abstracts of Papers of the American Chemical Society, Vol. 242. AMER CHEMICAL SOC, 2011.
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    • Mukherjee, Paramita, and Ross A. Widenhoefer. “Gold(I)-catalyzed intermolecular amination of allylic alcohols with cyclic ureas and related nucleophiles.” In Abstracts of Papers of the American Chemical Society, Vol. 240, 2010.
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    • Duncan, Alethea N., and Ross A. Widenhoefer. “Mechanistic studies and scrope of gold(I)-catalyzed intermolecular hydroamination of allenes with arylamines.” In Abstracts of Papers of the American Chemical Society, Vol. 239. AMER CHEMICAL SOC, 2010.
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    • Zhang, Zhibin, and Ross A. Widenhoefer. “ORGN 42-Gold(I)-catalyzed dynamic kinetic enantioselective hydroamination.” In Abstracts of Papers of the American Chemical Society, Vol. 236. AMER CHEMICAL SOC, 2008.
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    • Zhang, Zhibin, and Ross A. Widenhoefer. “ORGN 589-Gold(I)-catalyzed intermolecular hydroalkoxylation of allenes.” In Abstracts of Papers of the American Chemical Society, Vol. 236. AMER CHEMICAL SOC, 2008.
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    • Bender, Christopher F., William B. Hudson, and Ross A. Widenhoefer. “PRES 11-Platinum catalyzed intramolecular hydroamination of unactivated olefines with secondary alkylamines.” In Abstracts of Papers of the American Chemical Society, Vol. 235. AMER CHEMICAL SOC, 2008.
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    • Zhang, Zhibin, and Ross A. Widenhoefer. “INOR 555-Gold-catalyzed enantioselective cyclization of allenyl alcohols.” In Abstracts of Papers of the American Chemical Society, Vol. 234. AMER CHEMICAL SOC, 2007.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “ORGN 188-Au(I)-catalyzed intramolecular hydroamination of unactivated olefins with carboxamides.” In Abstracts of Papers of the American Chemical Society, Vol. 232. AMER CHEMICAL SOC, 2006.
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    • Bender, Christopher F., and Ross A. Widenhoefer. “INOR 437-Mechanism for the intramolecular hydroamination of unactivated olefins with secondary alkylamines.” In Abstracts of Papers of the American Chemical Society, Vol. 232. AMER CHEMICAL SOC, 2006.
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    • Kinder, Robert E., Xiaoqing Han, Hua Qian, and Ross A. Widenhoefer. “ORGN 922-Au(I)-Catalyzed intramolecular hydroamination of allenyl carbamates.” In Abstracts of Papers of the American Chemical Society, Vol. 232. AMER CHEMICAL SOC, 2006.
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    • Zhang, Zhibin, and Ross A. Widenhoefer. “ORGN 187-Au(I)-catalyzed cyclizations of allenyl alcohols.” In Abstracts of Papers of the American Chemical Society, Vol. 232. AMER CHEMICAL SOC, 2006.
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    • Kinder, Robert E., and Ross A. Widenhoefer. “Rhodium-catalyzed asymmetric borylative cyclization of 1,6-enynes.” In Abstracts of Papers of the American Chemical Society, Vol. 231. AMER CHEMICAL SOC, 2006.
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    • Bender, C. F., and R. A. Widenhoefer. “Intramolecular hydroamination of unactivated olefins with secondary alkylamines.” In Abstracts of Papers of the American Chemical Society, 230:U3226–U3226. AMER CHEMICAL SOC, 2005.
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    • Liu, C., and R. A. Widenhoefer. “Scope and mechanism of Pd-catalyzed arylation/carboalkoxylation of unactivated olefins with indoles and pyrrols.” In Abstracts of Papers of the American Chemical Society, 230:U3204–5. AMER CHEMICAL SOC, 2005.
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    • Qian, H., and R. A. Widenhoefer. “Platinum-catalyzed intermolecular hydroamination of vinyl arenes with carboxamides.” In Abstracts of Papers of the American Chemical Society, 230:U3226–U3226. AMER CHEMICAL SOC, 2005.
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    • Han, X. Q., and R. A. Widenhoefer. “Asymmetric intramolecular alkylation of indoles with unactivated olefins.” In Abstracts of Papers of the American Chemical Society, 229:U367–U367. AMER CHEMICAL SOC, 2005.
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    • Liu, C., X. Q. Han, X. Wang, and R. A. Widenhoefer. “Platinum-catalyzed intramolecular alkylation of indoles with unactivated olefins.” In Abstracts of Papers of the American Chemical Society, 228:U29–U29. AMER CHEMICAL SOC, 2004.
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    • Goj, L. A., N. S. Perch, and R. A. Widenhoefer. “Effect of terminal substitution on the intramolecular carbometallation of 5-hexenyl palladium chelate complexes.” In Abstracts of Papers of the American Chemical Society, 226:U782–83. AMER CHEMICAL SOC, 2003.
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    • Chakrapani, H., and R. A. Widenhoefer. “Rh-catalyzed cyclization/hydrosilylation of functionalized enynes.” In Abstracts of Papers of the American Chemical Society, 224:U167–U167. AMER CHEMICAL SOC, 2002.
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    • Pei, T., X. Wang, X. Q. Han, H. Qian, and R. A. Widenhoefer. “Palladium-catalyzed addition of stabilized carbon nucleophiles to unactivated olefins.” In Abstracts of Papers of the American Chemical Society, 224:U694–U694. AMER CHEMICAL SOC, 2002.
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    • Pei, T., and R. A. Widenhoefer. “Palladium-catalyzed intramolecular addition of 1,3-diones to unactivated olefins.” In Abstracts of Papers of the American Chemical Society, 223:B234–B234. AMER CHEMICAL SOC, 2002.
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    • Wang, X., S. Stankovich, and R. A. Widenhoefer. “Palladium-catalyzed ring-opening cyclization/hydrosilylation of 1-cyclopropyl-1,6-heptadienes to form (E)-1-butenyl cyclopentanes.” In Abstracts of Papers of the American Chemical Society, 223:B178–B178. AMER CHEMICAL SOC, 2002.
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    • Goj, L. A., and R. A. Widenhoefer. “Role of palladium cyclopentyl chelate complexes in the palladium-catalyzed cycloisomerization of functionalized 1,6-dienes.” In Abstracts of Papers of the American Chemical Society, 222:U140–U140. AMER CHEMICAL SOC, 2001.
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    • Pei, T., and R. A. Widenhoefer. “Palladium-catalyzed asymmetric cyclization/hydrosilylation of functionalized 1,6-dienes employing benzhydryldimethylsilane.” In Abstracts of Papers of the American Chemical Society, 222:U81–U81. AMER CHEMICAL SOC, 2001.
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    • Perch, N. S., and R. A. Widenhoefer. “Direct observation of the intramolecular carbometallation of a palladium alkyl-olefin chelate complex.” In Abstracts of Papers of the American Chemical Society, 222:U140–U140. AMER CHEMICAL SOC, 2001.
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    • Widenhoefer, R. A., J. W. Madine, X. Wang, and H. Chakrapani. “Platinum-catalyzed cyclization/hydrosilylation of functionalized diynes.” In Abstracts of Papers of the American Chemical Society, 222:U142–U142. AMER CHEMICAL SOC, 2001.
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    • Widenhoefer, R. A., B. K. Krzyzanowska, and G. Webb-Wood. “Palladium-catalyzed cyclization of 4-pentenylsilanes to form six-membered silicon heterocycles.” In Abstracts of Papers of the American Chemical Society, 216:U555–U555. AMER CHEMICAL SOC, 1998.
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    • Widenhoefer, R. A., M. A. DeCarli, and P. M. Gross. “Tandem cyclization/hydrosilylation of functionalized 1,6-dienes catalyzed by a cationic palladium complex.” In Abstracts of Papers of the American Chemical Society, 216:U571–U571. AMER CHEMICAL SOC, 1998.
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    • WIDENHOEFER, R. A., H. A. ZHONG, and S. L. BUCHWALD. “THE SYNTHESIS AND REDUCTIVE ELIMINATION OF PALLADIUM AMINE COMPLEXES.” In Abstracts of Papers of the American Chemical Society, 210:70-INOR. AMER CHEMICAL SOC, 1995.
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    • CASEY, C. P., S. L. HALLENBECK, and R. A. WIDENHOEFER. “KINETICS AND MECHANISM OF THE FORMATION OF THE BIS(ETHYLIDYNE) TRICOBALT CLUSTER CP-ASTERISK-C-3(CO3)(MU-3-CCH3)2 FROM ACETYLENE AND CP-ASTERISK-C-3(CO3)(MU-2-H)3(MU-3-H).” In Abstracts of Papers of the American Chemical Society, 209:304-INOR. AMER CHEMICAL SOC, 1995.
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    • CASEY, C. P., R. A. WIDENHOEFER, and S. L. HALLENBECK. “CONVERSION OF ACETYLENE TO A TRIPLE BRIDGED ETHYLIDYNE LIGAND ON THE CLUSTER CP-ASTERISK-3CO3(MU-3-H)(MU-2-H)3.” In Abstracts of Papers of the American Chemical Society, 206:194-INOR. AMER CHEMICAL SOC, 1993.
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• Teaching & Mentoring
• 

  Recent Courses

  • CHEM 202D: Organic Chemistry II 2020
  • CHEM 295: Introduction to Research Independent Study 2020
  • CHEM 393: Research Independent Study 2020
  • CHEM 394: Research Independent Study 2020
  • CHEM 493: Research Independent Study 2020
  • CHEM 494: Research Independent Study 2020
  • CHEM 533: Nuclear Magnetic Resonance 2020
  • CHEM 202L9: Organic Chemistry Laboratory 2019
  • CHEM 202L: Organic Chemistry II 2019
  • CHEM 295: Introduction to Research Independent Study 2019
  • CHEM 393: Research Independent Study 2019
  • CHEM 394: Research Independent Study 2019
  • CHEM 401L: Analytical Chemistry Laboratory 2019
  • CHEM 493: Research Independent Study 2019
  • CHEM 494: Research Independent Study 2019
  • CHEM 533: Nuclear Magnetic Resonance 2019
  • CHEM 202L9: Organic Chemistry Laboratory 2018
  • CHEM 202L: Organic Chemistry II 2018
  • CHEM 393: Research Independent Study 2018
  • CHEM 394: Research Independent Study 2018
  • CHEM 401L: Analytical Chemistry Laboratory 2018
  • CHEM 493: Research Independent Study 2018
  • CHEM 494: Research Independent Study 2018
• Scholarly, Clinical, & Service Activities
• 

  Presentations & Appearances

  • Approaches to Organic Synthesis Across Disciplines Symposium. November 15, 2013  2013
  • Wake Forest University. February 27, 2013  2013
  • University of Cincinnati. October 14, 2011  2011
  • Distinguished Service in the Advancement of Inorganic Chemistry Symposium. March 27, 2011  2011
  • University of Toledo. January 31, 2011  2011
  • Texas A&M University. January 8, 2009  2009
  • Merck Lecture Series. October 3, 2008  2008
  • UNC Wilmington. September 24, 2008  2008
  • Columbia University. September 4, 2008  2008
  • 32nd Reaction Mechanisms Conference. June 28, 2008  2008
  • Brandeis University. January 25, 2008  2008
  • Boston College. January 15, 2008  2008
• 

  Service to the Profession

  • Ad Hoc member, NIH/GMS SBCB study section. January 8, 2009  2009
  • NSF Chemistry Research Instrumentation and Facilities: Departmental Multi-User Instrumentation (CRIF-MU) Review Panel. January 8, 2009  2009
  • NSF Organic Synthesis (OMC) Review Panel. March 31, 2008 - April 1, 2008  2008

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