Synthesis of an ortho‐Methyl‐N,N′‐bis(triptycenyl) N‐Heterocyclic Carbene Ligand and Its Metal Complexes

Abstract

A new N,N′‐bis(triptycenyl)‐NHC ligand with methyl groups in the ortho position has been synthesized starting from 2,3‐dimethyltriptycene‐1,4‐quinone. The respective metal complexes [ML(NHC)] [ML = CuBr, AuCl, PdCl(allyl), RhCl(cod), IrCl(cod), RhCl(CO)2, IrCl(CO)2, and RuCl2(=CHC6H4OiPr)] were obtained by standard procedures. All the complexes were initially mixtures of syn and anti isomers. The ruthenium complex was separated into the syn and anti isomers. The crystal structure of the anti complex [RhCl(cod)(8)] has been determined.