Chiral bidentate ligands 1 have dominated the field of asymmetric transition metal catalysis for more than 30 years. However, since the recent breakthrough by Feringa and de Vries, 2 Reetz 3 and Pringle, 4 showing that metal complexes based on monodentate ligands can provide highly enantioselective catalysts, many examples using monodentate ligands have appeared in the literature. 5 The main reason for the preference for monodentate over bidentate ligands is ...