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