Fluorocarbon-bridged ditertiary phosphine derivatives of rhodium carbonyl halides

The Crystal Structure of [Rh(f6fos)2]+[cis-(CO)2RhCl2]−

“…Crystals were kindly provided by Dr. W. R. Cullen and their preparation is described elsewhere (1). The sample received was a mixture of crystals which had two different morphologies.…”

“…As a part of a program to investigate the reactions of fluorocarbon-bridged tertiary diphosphines and diarsines with transition metals (1)(2)(3)(4)(5)(6)(7)(8)(9), the reactions between these ligands and chlorodicarbonyl rhodium dimer were studied. The intention was to prepare simple monocar-bony1 complexes of the type LRh(C0)Cl (L is a chelating ditertiary diphosphine), and to study the ability of the ligands to stabilize these complexes with respect to oxidative addition (1). However, instead of simple monocarbonyl complexes, the type of product obtained from reacting 1,2-bis(dipheny1phosphino) ethane with [Rh(CO),Cl],, Cullen et al obtained salts containing cations of the type [RhL,]' by reacting cis-l,2-bis(dipheny1phosphino) ethylene with [Rh(CO),Cl],.…”

Syntheses and Structures of d10Coinage Metal Complexes of Electron-Accepting Phosphine Ligands Featuring a 3,3,4,4,5,5-Hexafluorocyclopentene Framework

“…12 According to our research, the hexafluorocyclopentene skeleton is expected to be a key motif of the πaccepting and sterically compact phosphine ligands that are useful in the development of Lewis acidic transition-metal complexes. Previously, 1,2-bis(diphenylphosphino)hexafluorocyclopentene ("F 6 PP") 13 and 1-(diphenylphosphino)-2-chlorohexafluorocyclopentene ("F 6 P") 14 (Scheme 1) were used to synthesize transition-metal complexes (Fe, 13,15 Rh, 16 Cr, 17 Mo, 17 W, 17 Co 18 ). Related hexafluorocyclopentene-bridged chiral bisphosphines were applied to Rh-catalyzed hydrogenation reactions of alkenes.…”