Note. Reactions of sulphoxide–thioether bidentate ligands with platinum(II). Determination of the mode of binding by cyclic voltammetry

Abstract

Cyclic voltammetry has been employed to study the mode of binding of 1,4-dithiacyclohexane 1-oxide (L¹) to platinum(II). Use of model compounds of the type [PtCl₂(PPh₃)L](L = unidentate thioether or sulphoxide) shows that thioether complexes require more negative potentials for reduction than analogous sulphoxide complexes. Preferential binding of L¹ to platinum(II)via the thioether functionality was established in the reaction with [Pt₂(µ-Cl)₂Cl₂(PPh₃)₂] using the magnitude of the peak potential for the platinum(II)→ platinum(0) reduction as a structural diagnostic.