Cyclometallated platinum complexes with heterocyclic ligands

The reactions of [Pt2Me4(μ-SMe2)2] with imine ligands derived from 3-furaldehyde, 3- or 4-pyridinealdehyde and N,N-dimethylethylenediamine, and 3-furaldehyde and chlorobenzylamine are reported. The furane ligands coordinated to platinum through the nitrogen donor and could be forced to orthometallate under severe conditions. The ligands with pyridine rings gave only substitution of the ligand for the dimethylsulphide. The oxidative addition reactions of the orthometallated complexes with methyl iodide as well as the complexesʹ reactions with triphenylphosphine are also reported. Correlation between aromaticity of the orthometallated ring and reactivity of the complexes is observed.