Synthesis: X-ray crystal structure, and reactivity of the monomeric dithio-o-carboranyl iridium complex [Ir(#eta#~5-C_5Me_5)(#eta#~2-S_2C_2B_(10)H_(10))]

摘要

The reaction between the pentamethylcyclopentadienyl complex [Cp~*IrCl_2]_2 and the dilithium dithio-o-carborane salt, Li_2[S_2C_2B_(10)H_(10)] (1), in THF affords the o-carborane-substituted compound Cp~*Ir(S_2C_2B_(10)H_(10)) (2) in good yield. The complex [Cp~*Ir(S_2C_2B_(10)H_(10))] (2) has been isolated and characterized by X-ray diffraction analysis which confirmed a coordinatively unsaturated mononuclear complex. Subsequent addition reactions of complex 2 with the nucleophiles PMe_3, CNBu~t, and CO yield the corresponding complexes [Cp~*Ir(S_2C_2B_(10)H_(10))(PMe_3)] (3), [Cp~*Ir(S_2C_2B_(10)H_(10))(CNBu~t)] (4), and [Cp~*Ir(S_2C_2B_(10)H_(10))(CO)] (5). All of these new compounds have been isolated in high yield and characterized by IR and NMR spectroscopy. The solid state structures of 3 and 5 were determined by single-crystal X-ray diffraction analysis, exhibiting a characteristic three-legged 'piano-stool' arrangement around the iridium metal center.