Rhodium(II) complexes as hydrosilylation and hydrogenation catalysts

Abstract

Made available courtesy of Elsevier: http://www.elsevier.com/ ***Reprinted with permission. No further reproduction is authorized without written permission from Elsevier. This version of the document is not the version of record. Figures and/or pictures may be missing from this format of the document.*** Summary: Two phosphine-rhodium(II) complexes, bis(tris-o-tolylphosphine)dichlororhodium(II) and bis(tricyclohexylphosphine)dichlororhodium(II), have been found to be active catalysts for the hydrosilylation of a variety of organic substrates, and, in conjunction with triethylaluminum, to be hydrogenation catalysts.

Probing the Factors That Stabilize Mononuclear Rhodium(II) Bis(phosphine), η6-Arene Complexes with Piano-Stool Geometries

“…Rh(I) and Rh(III) complexes are known to play an enormous role in the mechanistic cycles of many catalytic processes, and therefore, it is not surprising that Rh complexes in these oxidation states have been studied extensively. In comparison, little is known about the chemistry of Rh(II) complexes, especially monomeric, organometallic Rh(II) compounds . Of the isolable compounds known, all adopt either square-planar or sandwich coordination geometries.…”

Generation of the 15-Electron Rhodium(II) Complex [RhCl(PPh3)3]+by 1-Electron Oxidation of Wilkinson's Catalyst

“…The electron-transfer route is not followed when 1 reacts with Ag(I) triflate. Given the fact that mononuclear Rh(II) complexes may be active catalysts or catalyst precursors, it seems worthwhile to explore the possibility that oxidative treatment of RhCl(PPh 3 ) 3 and its analogues may give rise to useful low-temperature catalytic processes.…”