The reactivity of an iridaphosphirene complex, [Ir{
C(But)P(Cy)}(CO)(PPh3)2], Cy = cyclohexyl, toward electrophiles
Abstract
The reactivity of an iridaphosphirene complex, [Ir{C(But)P(Cy)}(CO)(PPh3)2], Cy =
C(But)P(H)(Cy)}(CO)(PPh3)2]X, X = BF4−, CF3SO3− or CF3CO2−, two of which have been crystallographically characterised. Though thermally stable in the solid state, in dichloromethane solutions these rearrange via 1,2-hydrogen migrations over seven days to give the Ir(I)–η1-phosphaalkene complexes, [Ir(CO)(PPh3)2{η1-P(Cy)
C(H)(But)}]X, one of which (X = BF4−) has been crystallographically characterised. The reactions of [Ir{
C(But)P(Cy)}(CO)(PPh3)2] with MeI, S and Se have also been investigated and found to give the complexes, [Ir{
C(But)P(Me)(Cy)}(CO)(PPh3)2]I and [Ir{
C(But)P(
E)(Cy)}(CO)(PPh3)2] E = S or Se, the former two of which have been structurally authenticated.