Ross A. Widenhoefer | Scholars@Duke

Ross A. Widenhoefer
Professor of Chemistry

Research in the Widenhoefer group is directed toward the development and mechanistic analysis of new organotransition metal-catalyzed transformations for application in the synthesis of functionalized organic molecules. In particular, our group has a long-standing interest in the functionalization of C–C multiple bonds with carbon and heteroatom nucleophiles catalyzed by electrophilic late transition metal complexes, with a recent focus on the synthetic and mechanistic aspect of gold(I) pi-activation catalysis. Current areas of inquiry include the following: 1) Gold(I) and Pt(II)-catalyzed hydroamination of alkenes an allenes. 2) Gold(I)-catalyzed dehydrative amination of underivatized allylic alcohols. 3) Synthesis and study of cationic, two-coordinate gold pi-complexes. 4) Evaluating the role of bis(gold) complexes in gold pi-activation catalysis. More detailed descriptions of these research projects can be found at our group web page.

Current Appointments & Affiliations

Professor of Chemistry, Chemistry, Trinity College of Arts & Sciences 2007
Director of Undergraduate Studies of Chemistry, Chemistry, Trinity College of Arts & Sciences 2018

Contact Information

124 Science Drive, 2101 French Science Center, Durham, NC 27708
Box 90346, Durham, NC 27708-0346
ross.widenhoefer@duke.edu (919) 660-1533
Widenhoefer Research Group

Background
Education, Training, & Certifications
- Ph.D., University of Wisconsin at Madison 1994
- B.A., Gustavus Adolphus College 1989
Duke Appointment History
- 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
- Multi-State Catalysts Modulated by Mechanical Force awarded by Department of Energy 2017 - 2019
- 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 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
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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). https://doi.org/10.1021/om300224f.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text Open Access Copy
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text Open Access Copy
  - 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.
    Full Text Open Access Copy
  - 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.
    Full Text
  - 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.
    Full Text
  - Widenhoefer, R. A. “Unactivated Alkenes,” September 16, 2009, 203–22. https://doi.org/10.1002/9783527626977.ch6.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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). https://doi.org/10.1016/j.jorganchem.2004.06.001.
    Full Text
  - 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).
  - Liu, Cong, Xiaoqing Han, Xiang Wang, and Ross A. Widenhoefer. “Platinum-Catalyzed Intramolecular Alkylation of Indoles with Unactivated Olefins [J. Am. Chem. Soc.2004,126, 3700−3701]..” Journal of the American Chemical Society 126, no. 33 (August 2004): 10493–10493. https://doi.org/10.1021/ja0470362.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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+.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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+.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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 (December 1, 1997): 2610–16.
  - 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.
    Full Text
  - 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.
  - 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.
  - 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.
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
  - 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.
    Full Text
- 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
  - 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.
    Link to Item
Teaching & Mentoring
Recent Courses
- 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 531: Organic Chemistry 2017
Scholarly, Clinical, & Service Activities
Presentations & Appearances
Service to the Profession

Some information on this profile has been compiled automatically from Duke databases and external sources. (Our About page explains how this works.) If you see a problem with the information, please write to Scholars@Duke and let us know. We will reply promptly.

Education, Training, & Certifications

Duke Appointment History

Awards & Honors

Selected Grants

Selected Publications

Academic Articles

Book Sections

Conference Papers

Recent Courses

Presentations & Appearances

Service to the Profession