Reactivity of the heteronuclear cluster Cp*IrOs 3(μ-H) 2(CO) 10 with some group 16 substrates

Abstract

The mixed metal cluster Cp*IrOs 3(μ-H) 2(CO) 10 ( 1) reacted readily with a number of group 16 substrates under chemical activation with TMNO. It reacted with C 6H 5SH to afford the novel cluster Cp*IrOs 3(μ-H) 3(CO) 9(μ-SPh) ( 2). It also reacted readily with Ph 3PSe to afford five new clusters, viz., Cp*IrOs 3(μ-H) 2(CO) 9(μ 3-Se) ( 3) Os 3(μ-H) 2(CO) 7(μ 3-Se)(PPh 3) 2 ( 4), Cp*IrOs 3(μ-H) 2(CO) 9(PPh 3) ( 5), Cp*IrOs 3(μ-H) 2(μ 3-Se)(CO) 8(PPh 3) ( 6) and Cp*IrOs 3(μ-H) 2(μ 3-Se) 2(CO) 7(PPh 3) ( 7). The reaction pathway for this reaction has been studied carefully and suggests that Ph 3PSe functioned primarily as a selenium atom transfer agent to give initially the even more reactive 3. The reaction of 1 with di- p-tolyl ditelluride yielded three new clusters, 8– 10, which were non-interconverting stereoisomers with the formulation Cp*IrOs 3(μ-H) 2(μ-Te- p-C 6H 4CH 3) 2(CO) 8.