Preparation and reactivity of cationic platinum(II) hydrido-complexes

Abstract

The preparation is reported of the cationic hydrides [Pt(PEt₃) diphos (H)]Cl (I) and [Pt(PEt₃)₂(PR₃)H]X (II)(R = Et or Ph; X = ClO₄ or BF₄) from the reaction of 1,2-bis(diphenylphosphino)ethane (diphos) or monodentate phosphine PR₃ with trans-[Pt(PEt₃)₂(H)Cl] in benzene or dichloroethane. Conductivity and i.r. spectral data are given. The reaction of (I) with hydrogen chloride in dichloroethane leads to the complex [Pt(PEt₃) diphos Cl]Cl with evolution of hydrogen. (I) reacts with SnCl₂ in methanol to give the four-co-ordinate [Pt(PEt₃) diphos H]-SnCl₃.