Synthesis, Structure, and Reactivity of Iridium NHC Pincer Complexes
datasetposted on 28.03.2011, 00:00 by Katherine M. Schultz, Karen I. Goldberg, Dmitry G. Gusev, D. Michael Heinekey
Iridium pincer complexes of the form (C∧C∧CMes)IrCl2 (1), (C∧C∧CMes)IrH4 (2), and (C∧C∧CMes)Ir(H)2L (L = PMe3 (3), pyridine (4)) have been prepared (C∧C∧C = [κ3-1,3-(CH2NHCMes)2C6H3]; NHCMes = N-mesitylimidazol-2-ylidene). Complexes 1−4 are the first examples of iridium complexes with CCC pincer ligands containing methylene bridges. Complex 2 activates C−H bonds of arenes at room temperature, as demonstrated by isotope exchange reactions. Under analogous conditions, no reaction was observed with alkanes.