Reactions of metal carbonyls with diphenylphosphine

Abstract

Monosubstituted diphenylphosphine derivatives of metal carbonyls are conveniently obtained by heating the carbonyl with one equivalent of the phosphine. Di- and tri-substituted derivatives of molybdenum hexacarbonyl can be prepared by replacing unsaturated hydrocarbon ligands by the phosphine. Fe₂(CO)₉ reacts with PPh₂H to give Fe(CO)₃(PPh₂H)₂. Infrared and ¹H and ³¹P nuclear magnetic resonance spectra of the diphenylphosphine products permit structural assignments. A new type of sym–asym isomerism for disubstituted octahedral phosphine complexes is postulated.