Reactions of zero- and di-valent platinum metal complexes with phosphirene ring systems. Crystal structures of cis-[PtCl2(PEt3)(PPhCPhCPh)], cis-[Ptl(PPh3)(CPhCPhPPhMe)] and [(Et3P)2Pt(CPhCPhPPh)W(CO)5]

Abstract

The phosphirene ring system Ph[graphic omitted]Ph 1 undergoes unidentate ligation and/or insertion reactions with a variety of platinum metal complexes. Insertion reactions also occur with the [W(CO)₅] adduct of 1. Detailed NMR and single-crystal X-ray studies on [PtCl₂(PEt₃)([graphic omitted]Ph)] and [(Et₃P)₂Pt(CPhCPhPPh)W(CO)₅] confirm the nature of both types of complexes. The compounds [{PtCl₂(PEt₃)}₂] and Mel react with [Pt(PPh₃)₂(CPhCPhPPh)] to give [(Ph₃P)₂Pt(CPhCPhPPh)PtCl₂(PEt₃)] and [Ptl(PPh₃)(CPhCPhPPhMe)], respectively, the latter being characterised by a single-crystal X-ray diffraction study.