Preparation and Characterization of Some Schiff Base Dioxime Metal Complexes

Abstract

A dioxime (LH2), [1,4-diaminobenzene-N,N′ -bis(2-butylidine-3-one oxime], reacts
with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) to yield dinuclear complexes of general formula
[M2(LH)2]Cl2 with a metal to ligand ratio of 2:2 with M = Co(II) or Cu(II), while Ni(II)
forms complex [Ni2(LH)2(H2O)2Cl2] with a metal to ligand ratio of 2:2, whereas Zn(II) and
Cd(II) form complexes of general formula [M2(LH)(H2O)2Cl2] with a metal to ligand ratio of
2 :1 . All complexes were characterized by metal content analyses, IR, electronic spectra,
magnetic susceptibility and conductivity measurements. The Co(II) and Cu(II) complexes are
proposed to be square planar while the Ni(II) complex is proposed to be octahedral and the
complexes of Zn(II) and Cd(II) are tetrahedral.