Reactions of 1-p-Dimethylaminobenzyl-2-p-Dimethylaminophenylbenzimidazole with Cobalt(II), Zinc(II) and Cadmium(II) Salts

Abstract

Synthesis of 1-p-dimethylaminobenzyl-2-p-dimethylaminophenylbenzimidazole (dmabdmapb, L) and its complexes of cobalt(II), [CoX₂L₂]·nH₂O (X = Cl, n = 3; X = Br, n = 0), Col₂L₂(OH₂), zinc(II) and cadmium(II), MX₂L₂·nH₂O (M = Zn, X = Cl, n = 0; X = Br, n = 3; X = I, n = 1; M = Cd, X = Cl, Br, I), [ZnL(OH₂)₃](ClO₄)₂·3H₂O and [CdL_1.5(OH₂)₂)₂](ClO₄)₄ is described. They have been characterized by IR, UV-visible and ¹H NMR spectra and magnetic susceptibility measurements. The electronic and magnetic susceptibility studies suggest a tetrahedral geometry for CoX₂L₂ (X = Cl, Br), zinc(II) and cadmium(II) complexes and a trigonal bipyramidal geometry for CoI₂L₂(OH₂).