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

Abstract

The crystal structure of di(1,2-bis(diphenylphosphino)hexafluorocyclopentene) rhodium(I) cis-dicarbonyldichlororhodate(I), [Rh(f6fos)2][cis-Rh(CO)2Cl2] has been determined from three-dimensional X-ray scintillation counter data. The structure has been refined by full-matrix least-squares techniques to a conventional R factor of 8.8%. The salt crystallizes in the tetragonal space group I41/a with eight formula units in a cell of dimensions a = 17.722(1) Å and c = 36.773(4) Å. Each ion is nearly square planar and has a crystallographic two-fold axis passing through the rhodium atom. The two independent Rh—P distances are 2.282(6) and 2.300(6) Å, and the bite of the chelating ditertiary phosphine, f6fos, is 3.111(8) Å as measured by the intra-ligand P—P distance.

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

“…According to our research, the hexafluorocyclopentene skeleton is expected to be a key motif of the π-accepting 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”) and 1-(diphenylphosphino)-2-chlorohexafluorocyclopentene (“F 6 P”) (Scheme ) were used to synthesize transition-metal complexes (Fe, , Rh, Cr, Mo, W, Co). Related hexafluorocyclopentene-bridged chiral bisphosphines were applied to Rh-catalyzed hydrogenation reactions of alkenes .…”