Synthesis and characterization of thiolato- and selenolato-platinum(II) complexes with bis(diphenylphosphino)alkanes

Abstract

The complexes [Pt(ER)₂(L–L)[ER = SPrⁱ, SPh, C₆H₄Me-p or SePh; L–L = Ph₂P(Ch₂)_nPPh₂(n= 1–3)] have been prepared and their ability to act as bidentate ligands towards other metal species demonstrated. Proton, ³¹P and ¹⁹⁵Pt NMR spectroscopy have been employed to ascertain their structures. A single-crystal X-ray structure determination of [Pt(SePh)₂(Ph₂PCH₂PPh₂)] has established the mononuclear nature of the complex. The platinum atom is in a distorted square-planar environment with the selenium atoms and the chelating diphosphine ligand in a cis configuration. The four-membered PtPCP metallacyclic ring is non-planar.