The coordination chemistry of iminooxosulphuranes IX. The insertion reactions of tosyliminooxosulphurane with coordinatively unsaturated ruthenium and osmium aryl complexes

Abstract

The 16-electron compounds [MRCl(CO)(PPh3)2] (M = Ru, Os; R = C6H4Me-4) react with toluene sulphonyliminooxo-λ4-sulphurane (RSO2NSO, tosyl-NSO) to give the N-(tosyl)toluenesulphinimidato-S complexes [MCl{SR(NSO2R)O}(CO)(PPh3)2] (which are presumably stabilised by weak coordination of a sulphimide group). No reaction is observed between the complexes [MRCl(CO)(PPh3)2] and the less electrophilic iminooxo-λ4-sulphuranes R′NSO (R′ = R, C6H4Me-2, ferrocenyl). In keeping with its coordinative unsaturation, the complex [OsCl{SR(NSO2R)O}(CO)(PPh3)2] reacts with xylyl isonitrile to give [OsCl{SR(NSO2R)O}(CNC6H3Me2-2,6)(CO)(PPh3)2]. No insertion reactions were observed between tosyl-NSO and the 18-electron complexes [Ir(CH3)I(NO)(PPh3)2], [OsRCl(CO)2(PPh3)2], [RuBr(CF3)(CO)2(PPh3)2] and [Ru(C6H5)Cl(CO)(CNC6H3Me2-2,6)(PPh3)2].