SYNTHESIS AND CHARACTERIZATION OF NEW CHIRAL SCHIFF-BASE COMPLEXES WITH DIIMINOBINAPHTHYL OR DIIMINOCYCLOHEXYL MOIETIES AS POTENTIAL ENANTIOSELECTIVE EPOXIDATION CATALYSTS

New chiral Schiff base complexes have been obtained by condensation of 2,2'-diamino-1,1'-binaphthalene or 1,2-diaminocyclohexane and various salicylaldehydes and by subsequent metalation with manganese, iron, c obalt, nickel, copper, or zinc. The complete H-1 and C-13 NMR characte rization of the ligands is reported, as are the X-ray crystal structur es of hylamino)salicyidene]-trans-1,2-cyclohexanediimine and -bis(sali cylidene)-trans-1,2-cyclohexanediiminato] copper(II). The new chiral m anganese complexes have been evaluated in the oxygenation of prochiral olefins and sulfides using sodium hypochlorite, hydrogen peroxide, or N-methylmorpholine N-oxidelm-chloroperbenzoic acid as oxidant.