New method for the synthesis of [PtCl{η1-CH2C(O)R}(N-N)] ketonyl derivatives starting from the Zeise's salt

We studied the reactivity of the Zeise's salt with ketones, in the presence of strong bases, demonstrating the formation of intermediate complexes of the type trans-[PtCl2{η1-CH2C(O)R}(η2-C2H4)]−. Further reaction with dinitrogen ligands (N-N) gives [PtCl{η1-CH2C(O)R}(N-N)] complexes. This reactivity of the Zeise's anion can be exploited for the general synthesis, in a one pot reaction, of σ-carbon Pt(II) ketonyl derivatives with aliphatic or aromatic dinitrogen ligands.