First Examples of β‐Diketonate Platinum(II) Complexes with Sulfoxide Ligands

Abstract

AbstractNew platinum(II) complexes have been prepared as models for explaining the coordination of multiple β‐diketonate li‐gands to give [Pt(O,O′‐acac)(γ‐acac)L] species. The new com‐pounds containing both an O,O′‐chelated acetylacetonate ligand and a sulfoxide in the platinum coordination sphere, [PtCl(O,O′‐acac)(DMSO)] (1) and [Pt(O,O′‐acac)(γ‐acac)(DMSO)] (2), have been synthesised and characterised by 1H, 13C, 195Pt 1‐D and 2‐D NMR heteronuclear correlation spectroscopy and, in the case of 2, by X‐ray crystal structure analysis also. Moreover, a new synthetic pathway to obtain the previously reported complex K[Pt(O,O′‐acac)(γ‐acac)2] (3) has been developed. The data presented herein are consistent with a reaction mechanism which explains the subsequent steps of the coordination of multiple β‐diketonate li‐gands to platinum(II) complexes, where the first species formed contains one O,O′‐chelated acac group. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)