Abstract The preparation, separation, and characterization of mixed ligand cobalt (III) complexes containing either the new asymmetric linear tetradentate ligand, ethylenebis-(S)- phenylalanine ((SS)-EBPhe), or known asymmetric linear tetradentate ligand, ethylenebis- (S)-valine ((SS)-EBV), and an aromatic or aliphatic diamine (dam) respectively are reported. The absolute configuration of these complexes are assigned by considering the electronic ...