Reactions of Complex Ligands, LXXVII. Axial‐Chiral Metal Carbenes: Synthesis and Structure of 1,1‐Binaphthyl‐Derived Carbonyl‐Carbene Complexes of Chromium

Abstract

Abstract Axial‐chiral mono‐ and biscarbene complexes of chromium containing the 1,1‐binaphthyl skeleton have been obtained in both racemic and enantiopure forms in a one‐pot reaction starting from lithiated 2,2‐dimethoxy‐1,1‐binaphthyl ( 1 ) and hexacarbonyl chromium via the Fischer route. An X‐ray structure analysis of the biscarbene complex 2 reveals that the biscarbene functionalization significantly increases the dihedral angle defined by the biaryl planes. The enantiopure complexes have been characterized by CD spectroscopy.