Pentamethylcyclopentadienylrhodium bis-carboxylates: Monohapto carboxylate coordination, dihapto carboxylate coordination, and water coordination to Cp*Rh

Journal Article (Journal Article)

Reaction between [Cp*RhCl ] and silver carboxylates in anhydrous, non-coordinating solvents produces Cp*Rh(η -O CR) (η -O CR) complexes with the unusual feature of having both the η and η carboxylate ligands bound to the same metal. The benzoate complex Cp*Rh(η -O CPh) (η -O CPh) was characterized crystallographically and its structure is discussed. Cp*Rh(η -O CPh) (η -O CPh) was found to crystallize in the monoclinic space group P2 /c with a=11.658(3), b=14.574(4), c=26.248(6) Å, β=101.87(2)° and V=4364(2) Å for Z=8. These bis-carboxylate compounds are very hygroscopic, reacting with water quite readily to form the aquo complexes, Cp*Rh(OH ) (η -O CR) . The acetate aquo complex Cp*Rh(OH ) (η -O CMe) was characterized crystallographically and was found to crystallize in the monoclinic space group P2 /c with a=8.910(2), b=12.854(4), c=14.710(3) Å, β=106.82(2)° and V=1612.6(7) Å for Z=4. The water molecule in Cp*Rh(OH ) (η -O CMe) was found to internally hydrogen bond to the coordinated acetate groups. The coordination of water in Cp*Rh(OH ) (η -O CMe) is unusual in that the Rh-O bond is perpendicular to the plane of the water molecule. The geometry of water coordination in these Cp*Rh complexes is compared with geometries found for water coordinated to other non-classical, organometallic compounds. 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 1 2 2 2 2 2 2 2 1 2 1 2 1 2 1 3 1 1 3 1 1

Full Text

Duke Authors

Cited Authors

  • Boyer, PM; Roy, CR; Bielski, JM; Merola, JS

Published Date

  • April 1, 1996

Published In

Volume / Issue

  • 245 / 1

Start / End Page

  • 7 - 15

International Standard Serial Number (ISSN)

  • 0020-1693

Digital Object Identifier (DOI)

  • 10.1016/0020-1693(95)04793-X

Citation Source

  • Scopus