121374-13-8Relevant articles and documents
Organorhodium(I) and -rhodium(III) complexes containing the ligand 1,1,1-tris((diphenylphosphino)methyl)ethane (triphos)
Johnston, Gregory G.,Baird, Michael C.
, p. 1894 - 1903 (2008/10/08)
Treatment of the complex [Rh(CO)2(triphos)]PF6 (triphos = MeC(CH2PPh2)3) with the ligands L (L = PMe3, PMe2Ph, PEt3, P(n-Bu)3, P(OMe)3, t-BuNC) resulted in the formation of complexes of the type [Rh(CO)L(triphos)]PF6. The analogous complexes of PPh3, ethylene, and propylene could not be prepared in this way but were synthesized by displacing molecular hydrogen from the complex [RhH2(CO)(trip-hos)]PF6, prepared by the photochemical oxidative addition of H2 to [Rh(CO)2(triphos)]PF6. The σ-bonded organorhodium(I) complexes RhR(CO)(triphos) (R = Me, Ph) were prepared by treating RhCl(CO)(triphos) with the appropriate alkyllithium reagent, and these compounds in turn were found to react readily with CO to form the acyl complexes Rh(RCO)(CO)(triphos). Addition of anhydrous HCl to the complex RhCl(CO)(triphos) resulted in the formation of a mixture of RhHCl2(CO)(triphos) and RhCl3(triphos), while addition of excess chlorine, bromine, or iodine to [Rh(CO)2(triphos)]PF6 resulted in the formation of the rhodium(III) complexes [RhX2(triphos)]PF6 (X = Cl, Br, I). These reacted in turn with methyllithium to form RhMe3(triphos), and with a variety of neutral ligands L to form the series [RhX2L(triphos)]PF6.
