The synthesis and characterization of novel (E,E)-dioxime and its nickel (II) complexes containing compartmental and twofold macrocyclic moieties

Abstract

A new (E,E)-dioxime, S,S′-bis(2-acetophenone)dithioglyoxime, has been synthesized by the reaction of dichloroglyoxime with 2-thioacetophenone. Only mononuclear Ni (II) complex with a metal:ligand ratio (1:2) was prepared and then Ni(II) complex bridged BF2 + was obtained with hydrogen-bridged Ni(II) complex and boron trifluoride etherate. The reaction of BF2 +-capped Ni(II) complex with 4′,5′-diaminobenzo [15-crown-5] gave a twofold complex. The structure of ligand and Ni(II) complexes are proposed according to elemental analyses, 1H, 13C NMR, IR and mass spectral data and semi-empirical quantum chemical calculations. Synthesis and characterization of novel (E,E)-dioxime and its Ni(II) complex as well as the BF2-bridged complex were prepared. Then the nickel(II) complex containing compartmental and twofold macrocyclic moieties has been synthesized by the macrocyclization reaction of 4′,5′-diaminobenzo[15-crown-5] with BF2 +-capped nickel(II) complex.