Solid state self-assembly synthesis of cobalt(II), nickel(II), copper(II) and zinc(II) complexes with a bis-Schiff base

Four-coordination compounds of the bis-Schiff base, bis(o-vanillin)-o-phenylenediamine with Co-II, Ni-II, Cu-II and Zn-II were obtained in high yield by a self-assembly solid state reaction of the metal acetates with o-vanillin and o-phenylenediamine at 60 degrees C. The complexes were characterized by elemental analyses, i.r., u.v., molar conductivities and by powder XRD. The spectroscopic data show that the complexes are pure and are nonelectrolytes.