Binuclear hydrido platinum(II) complexes: syntheses of [{Pt(PP)} 2(μ-CHCH 2R)(μ-H)][BF 4] (R=C 6H 5, H) and easy cleavage of a PC bond in a chelating 1,4-bis (diphenyl)phosphinobutane (PP)

Abstract

Reactions of the binuclear platinum(II) trihydrido complex, [Pt 2{(Ph 2P) 2(CH 2) 4} 2(H) 3][BF 4], with styrene or ethylene, at room temperature and low pressure, give μ-alkylidene, μ-hydrido cationic species [Pt 2{(Ph 2P) 2(CH 2) 4} 2(μ-CHCH 2R)(μ-H)][BF 4] (R=C 6H 5, 1; H, 2) together with an unexpected phosphido-bridged binuclear platinum(II) compound ( 3), originating from cleavage of a PC bond in the coordinated diphosphine. Complexes 1– 3 are discussed on the basis of FAB MS, IR and multinuclear NMR spectra in solution.