N‐Heterocyclic Carbene Functionalized Iridium Phosphinidene Complex [Cp*(NHC)IrPMes*]: Comparison of Phosphinidene, Imido, and Carbene Complexes
抄録
<jats:title>Abstract</jats:title><jats:p>The novel phosphinidene complex [Cp*(NHC)IrPMes*] (<jats:bold>3</jats:bold>; NHC=1,3‐diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene) was prepared in high yield from [Cp*(NHC)IrCl<jats:sub>2</jats:sub>] (<jats:bold>2</jats:bold>) and [LiPHMes*]<jats:bold>⋅</jats:bold>3 THF. It represents the first example of an NHC ligated transition metal phosphinidene complex. The X‐ray crystal structure for <jats:bold>3</jats:bold> is also reported. DFT calculations on the N‐heterocyclic carbene containing parent complexes [Cp(NHC)IrE] (E=PH, NH, CH<jats:sub>2</jats:sub>) show that the NHC ligand acts as good σ‐donor/weak π‐acceptor ligand and forms strong IrC(NHC) single bonds. The IrE double bonds result from strong triplet–triplet interactions between [Cp(NHC)Ir] and E.</jats:p>
収録刊行物
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- Chemistry – A European Journal
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Chemistry – A European Journal 9 (15), 3577-3582, 2003-07-28
Wiley