Oxygen-transfer reactions in platinum metal complexes of nitric oxide and sulphur dioxide
Abstract
The reactions of SO2 with [Pt(N2O2)(PPh3)2] and NO with [Pt(PPh3)3(SO2)] have been shown to result in the formation of [Pt(NO2)2(PPh3)2] and [Pt(PPh3)2(SO3)], Which arise from ready oxygen-transfer reactions. A compound which analyses correctly for [Pt(N2O2)(PPh3)2(SO2)] has also been isolated from these reactions and is formulated as an insertion product on the basis of i.r. and chemical studies. The reaction of [Ru(NO)2(PPh3)2] with SO2 proceeds in a quite different fashion and gives an SO2 adduct [Ru(NO)2(PPh3)2(SO2)] which has both a linear and a bent NO ligand. This complex is readily oxidised to the corresponding sulphato-complex in air.