Complexes of a Quadridentate Schiff Base Ligand Derived from o-Phenylenediamine and 2-Formylcyclohexanone with Ni(II), Cu(II), Co(II), Zn(II), Pb(II) and UO₂(VI)

Abstract

Metal(II) chelates of the Schiff base ligand derived from 2-formylcyclohexanone with o-phenylenediamine have been prepared and characterized. The isolated complexes are of the type ML.xH₂O where M = Ni(II), Cu(II), Co(II), Zn(II), Pb(II), and UO₂(VI) and where H₂L stands for the bis(2-formylcyclohexylidene)-o-phenylenediamine Schiff base ligand. A trinuclear Cu(II) complex of the formula Cu₂L₂.CuCl₂.3H₂O was also prepared. The chelates were characterized by elemental analyses, IR, ¹H NMR and UV-Visible spectra as well as conductivity and magnetic measurements. It has been found that the ligand behaves as an ONNO quadridentate, dibasic chelate and that the complexes are non-electrolytes in DMF. The mode of bonding and geometrical structure are suggested.

Referee I: E. Doomes

Referee II: R. B. Gayhart

Notes

Referee I: E. Doomes

Referee II: R. B. Gayhart