Aryl chalcogenolates of palladium(II) and platinum(II): Synthesis and structure

Abstract

Complexes of the type [PtCI(SeAr)(PPh₃)₂] (I), [Pt(SeAr)₂(PPh₃)₂] (II) and [M(DPPE)(EAr)₂] (III) [Ar= Ph, C₆H₄OMe-4; M =Pd, Pt; DPPE= 1, 2-bis(diphenylphosphino)ethane; E= Se, Te] have been synthesized from the reactions between <em>cis</em>-[PtCl₂(PPh₃)₂] and NaSeAr, and between [M(DPPE)Cl₂] and NaEAr (generated <em>in situ</em>) in ethnaol-benzene at room temperature. Their structures have been established on the basis of elemental analyses, conductance and molecular weight measurements, and IR, ¹H and ³¹P NMR spectra. A <em>trans-</em>form for I and II and a <em>cis-</em>form for III have been assigned. The reaction of III (M = Pt: Ar = Ph) with [Pd(PhCN)₂Cl₂] has led to the formation of an interesting class of hetero binuclear complexes [DPPE)Pt(μ-Eph)₂PdCl₂] (IV) with phenyl cha1cogen bridging.