The iridium complex Cp*(PMe3)Ir(Me)(SiMe2OTf) (2) reacts with LiB(C6F5)4(Et2O)2 to form a mixture of the silene complex [Cp*(PMe3)Ir(η2-CH2SiMe2)(H)][B(C6F5)4] (3) and the base-stabilized silylene complex [Cp*(PMe3)Ir(Me)(SiMe2(Et2O))][B(C6F5)4] (4). The silene complex 3 has been crystallographically characterized. Addition of pyridine to this mixture affords Cp*(PMe3)Ir(Me)(SiMe2(L)][B(C6F5)4] (5a, L = pyridine) in good yield, whereas addition of CO or ethylene results in clean formation of Cp*(PMe3)Ir(L)(SiMe3)][B(C6F5)4] (8a, L = CO; 8b, L = C2H4).
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