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Iridium Abnormal N-Heterocyclic Carbene Hydrides via Highly Selective C−H Activation

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journal contribution
posted on 24.03.2008, 00:00 by Guoyong Song, Xinjiao Wang, Yongxin Li, Xingwei Li
Imidazoliums with proximal phosphines undergo C−H oxidative addition on [Ir(COD)Cl]2 to give iridium(III) abnormal carbene hydrides. The effects of the length of the linker between the imidazolium and the phosphine are systematically studied. These C−H activation products can undergo base-promoted H−Cl reductive elimination to afford the corresponding Ir(I) abnormal NHC complexes.