SYNTHESIS AND CHARACTERIZATION OF PLATINUM(II) AZOPHENOLATES INCORPORATING THIOETHER SULPHINYL DONOR SITES/

Oxygen insertion into the Pt-C bond has been examined. Both thioether and sulphinyl azobenzene platinum(II) complexes (5 and 6) undergo meta lloxylation by m-chloroperbenzoic acid (m-CPBA) when stirred in aceton itrile solution for a long time. Usually the reactions in chlorocarbon solvents form platinum(IV) organometallics, unlike isomorphous pallad ium(II) complexes. The reaction was confirmed by non-oxidative synthes is using hydroxyazobenzenes (9 or 10) liberated via reductive eliminat ion of the metal from the corresponding palladium(II) complexes. Plati num(II) azophenolates (7 or 8) were characterized by spectroscopic tec hniques.