Preparation, properties, and X-ray photoelectron spectra of palladium(II) and platinum(II) complexes of amine lmides (aminimides) and sulphur ylides

Abstract

The reactions of amine imides RR′₂NNCOR″(R = PhCH₂ or p–O₂NC₆H₄CH₂, R′= Me, R″= Me, Et, or Ph) and the sulphur ylide Me₂S(O)CHCOPh with halides of palladium(II) and platinum(II) give novel ylide–metal complexes [MCl₂L₂], [PtCl₂{Me₂S(O)CHCOPh}(SEt₂)], and [PtCl₂{Me₂S(O)CHCOPh}]. Infrared, ¹H and ¹³C n.m.r., and X-p.e. data indicate that the co-ordination of the ylide to the metal is through the nucleophilic N or C atom as simple terminal ligands. The complex cis-[PtCl₂{Me₂S(O)CHCOPh}(SEt₂)] releases diethyl sulphide in dimethyl sulphoxide and is transformed into the complex [PtCl₂{Me₂S(O)CHCOPh}] which is chelated through the carbanion carbon and the sulphonium oxygen of the ylide. The thermal properties of the complexes have been examined by thermal gravimetric analysis. and the nature of the bonding is discussed.