An Enantiomerically Pure Schiff Base Ligand

(1R, 2R)-(-)-N,N'-Bis(quinoline-2-methylidene)-1,2-cyclohexandiamine, C₂₆H₂₄N₄, was prepared by the reaction of quinoline-2-carbaldehyde and the corresponding diamine. The crystal structure of the resulting enantiomerically pure quadridentate ligand has been determined.