Synthesis, characterization, and X-ray crystal structures of copper(II) and nickel(II) complexes with two bis(thiosemicarbazone) ligands and investigation of their electrochemical behavior

Abstract

Two new bis(thiosemicarbazone) ligands having a halogen substituent on the non-coordinating phenyl rings, namely 2-[1-(2-{3-[2-({2-[(4-bromoanilino)carbothioyl]hydrazono} methyl)phenoxy]propoxy}phenyl)methylidene]-N1-(4-bromophenyl)-1-hydrazinecarbothiamide (H 2 L3) and 2-[1-(2-{3-[2-({2-[(4-bromoanilino)carbothioyl]hydrazono}methyl)phenoxy]-2-hydroxypropoxy}phenyl) methylidene]-N1-(4-bromophenyl)-1-hydrazinecarbothiamide (H 3 L4), were used in the synthesis of a series of CuII and NiII complexes [Cu(L3)]·MeOH, [Cu(HL4)], [Ni(L3)], and [Ni(HL4)]·MeOH. The complexes were characterized by physicochemical and spectroscopic methods. Single-crystal X-ray structures of [Cu(L3)]·MeOH, [Cu(HL4)], an..