η6‑Tetramethylfulvene and μ‑η3:η3‑Benzene Complexes of Iridium
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The reaction of Cp*Ir(NHC)Me2 (Ir-Me2) with [CPh3]+[B(C6F5)4] in dichloromethane resulted in conversion of the Cp* ligand to an η6-tetramethylfulvene ligand via apparent hydride abstraction (Cp* = η5-C5Me5; NHC = 1,3-N,N-dimethylimidazol-2-ylidene). The products of this reaction are triphenylmethane and the η6-tetramethylfulvene complex [(η6-C5Me4CH2)Ir(NHC)(Me2)]+[B(C6F5)4] (fulv-Ir+). When dichloromethane solutions of the related complex [Cp*Ir(NHC)(Ph)(solv)]+[MeB(C6F5)3]− were allowed to stand at room temperature, crystals of the unusual sandwich complex [{Cp*Ir(NHC)}2(μ-η3:η3-C6H6)]2+ (Ir-C6H6-Ir2+) were obtained. Complexes fulv-Ir+ and Ir-C6H6-Ir2+ represent unique architectures in the Cp*Ir(NHC) family. Both compounds were characterized by spectroscopic methods as well as by single-crystal X-ray diffraction.
创建时间：
2016-02-20
