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 BF 2 + was obtained with hydrogen-bridged Ni(II) complex and boron trifluoride etherate. The reaction of BF 2 + -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, 1 H, 13 C NMR, IR and mass spectral data and semi-empirical quantum chemical calculations. Graphical Abstract: Synthesis and characterization of novel (E,E)-dioxime and its Ni(II) complex as well as the BF 2 -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 BF 2 + -capped nickel(II) complex. [Figure not available: see fulltext.] © 2012 Springer Science+Business Media B.V.