Synthesis and Characterization of Metal Complexes of Copper(II), Nickel(II) ans Cobalt(II) with Bis-(1,2-Diphenyl-1-Hydroxyimino-2-Ethylidene) 1,3-Diamino Benzene

Abstract

The ligand bis-( 1,2-diphenyl-1-hydroxyimino-2-ethylidene)-1,3-
diamino benzene reacts with metal acetates to give inner complex of the
type M₂L₂, where M = Cu(II) and M₂L₂.4H₂O where
M = Ni(II) and Co(II). The neutral complexes of Cu(II) are devoid of water
molecules while Ni(II) and Co(II) complexes are found to contain four
molecules of water. Besides the neutral complexes, complexes of other
two different series such as M₂(LH₂)X₄ where M = Cu(II) and X = Cl^-,
Br^-, I^-, NO₃^- and M₂(LH₂)X₄, where M = Co(II) and Ni(ll); X = Cl^-,
Br-, I^-,  NO₃^-, have been prepared where the ligand co-ordinates with the
metal ion in its uncharged form. IR electromc spectra and magnetic moment
measurements have been used to characterize the compounds.