Chemistry of vinylidene complexes X. Synthesis and characterization of the vinylidene bridged complexes Cp(CO) 2MnPt(μ-CCHPh)(PP) with chelating diphosphine ligands PPdppm, dppe or dppp at the platinum atom

Abstract

The binuclear μ-vinylidene complex Cp(CO) 2MnPt(μ-CCHPh)(PPh 3) 2 reacts with diphosphines PP Ph 2P(CH 2) n PPh 2, where n=1 (dppm), 2 (dppe) or 3 (dppp), at room temperature to give new complexes of the type Cp(CO) 2MnPt(μ-CCHPh)(PP) with chelating disphosphine ligands PP at the Pt atom in quantitative yields. All complexes are characterized by IR and 1H, 13C and 31P NMR spectra. The influence of the nature of the ligands at the Pt atom on the bonding between Pt and the semi-bridging carbonyl group is discussed.