Carbonyl halides of the Group 6 transition metals. VI. Complexes with Bis(diphenylphosphino)methane

Abstract

Complexes of the type MX₂(CO)₂ diphos₂ [M = Mo, W; X = Cl, Br; diphos = bis(diphenylphosphino)methane] have been prepared and characterized. The complexes are neutral, diamagnetic, seven-coordinate species with one of the diphosphine molecules acting as a monodentate ligand. Nuclear magnetic resonance, conductance, and molecular weight studies support this view. The monomeric complex MoBr₂(CO)₃ diphos has also been prepared.