Preparation and Characterization of Co(II), Ni(II) and Cu(II) ions Binuclear Complexes with Macrocyclic Schiff Base Derived from Acidhydrazide and α-Hydroxy Ketone

The homogenous binuclear complexes of marcocyclic schiff base ligand obtained from [2+2] condensation reaction between benzion and α ˗ aminobenzoylhydrazide in presence of the metal salt , in neutral and alkaline media . the complexes were characterized by quantitive determination of the metal and chloride content , molar conductance , spectral and magnetic susceptibility measurement . the different studies revealed that the prepared complexes possess the following formulae [lh4m2x2 ]and k2[ lm2x2]in neutral and alkaline medium respectively (where lh4 = macrocyclic schiff base ligand , m+2=co,ni ,cu; x-=no3,cl). the complexes of neutral medium are non-electrolytes , six coordinat , while alkaline medium complexes are electrolytes of 2:1 ratio and four coordinate