Reactivity of the Acyclic Diazadioxa Redox Active Ligand [(C(5)H(5))Fe(C(5)H(4)CH(2)N(CH(3))(CH(2))(2)OCH(2)-)](2): NMR, Electrochemical, and Mössbauer Studies. Crystal Structure of Its Copper Complex.

Several novel diazadioxa ferrocenyl derivatives have been prepared along with their previously unknown electroactive precursor [(C(5)H(5))Fe(C(5)H(4)CH(2)N(CH(3))(CH(2))(2)OCH(2)-)](2) (2). Di-N,N'-protonated and -methylated species [2(H)(2)][X](2) (3a-c) (X = CF(3)SO(3), BF(4), PF(6)) and [2(Me)(2)][CF(3)SO(3)](2) (5), and N-H-N monoprotonated species [2H][X] (4a-c) have been isolated in high yield. The efficient syntheses of compounds [2Na][PF(6)] (6), [2Cu][CF(3)SO(3)] (7), [2Ag][CF(3)SO(3)] (8), and [2MCl(2)] (M = Zn, Hg) (9, 10) are reported.

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, cobalt, nickel, copper, or zinc. The complete (1)H and (13)C NMR characterization of the ligands is reported, as are the X-ray crystal structures of (1R,2R)-(-)-N,N'-bis[3-(N,N-dimethylamino)salicylidene]-trans-1,2-cyclohexanediimine and [(1R,2R)-(-)-N,N'-bis(salicylidene)-trans-1,2-cyclohexanediiminato]copper(II). The new chiral manganese complexes have been evaluated in the oxygenation of prochiral olefins and sulfides using sodium hypochlorite, hydrogen peroxide, or N-methylmorpholine N-oxide/m-chloroperbenzoic acid as oxidant.