Abstract
Two cyclometalated compounds [IrIIICl{(2-biphenylene-1,8-naphthyridine-κC,N}(η 5-pentamethylcyclopentadienyl)] (1) and [IrIIICl{(2-(2-N-Methyl-pyrrolyl-1,8-naphthyridine-κC,N}(η 5-pentamethylcyclopentadienyl)] (2) containing naphthyridine based ligands have been synthesized in high yield. Insertion of SnCl2 to a terminal Ir–Cl bond of 1 affords the mixed Ir–SnCl3 compound [IrIIISnCl3{(2-biphenylene-1,8-naphthyridine-κC,N}(η 5-pentamethylcyclopentadienyl)] (3). The heterobimetallic compound 3 is shown to be an excellent catalyst for a variety of cyanosilylation reactions. A cooperative mechanism has been proposed which involves the simultaneous activation of aldehyde and cyanide precursor by Sn and unbound naphthyridine nitrogen.
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