Preparation and study of some Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II) complexes containing heterocyclic nitrogen donor ligands, E-Journal of Chemistry

Abstract

Abstract: This paper presents a new mixed-ligand complexes with the general formula [M(BT)(BI) 2 X 2 ] where BT=benzotriazole, BI=benzimidazole, X=SCN and M=Mn(II), Co(II), Ni(II), Cu(II), Cd(II) and Pb(II). The reaction was carried out by using the appropriate molar ratios of metal:ligand (1:1:2:2) (M:BT:BI:X) as required. The resulting products were found to be solids, not soluble in water and in ordinary organic solvents but highly soluble in DMSO. These complexes have been studied by UV-Visible, IR and ( 1 H, 13 C) NMR spectra, molar conductivity, elemental analysis of C, H, N, determination of metal and magnetic susceptibility. The result suggests that the benzimidazoleas as a monodentate was coordinated with the metal ions through the N atom. Nevertheless, the benzotriazole as bidentate was coordinated with the metal ions through the N2 and N3 atoms. SCN was coordinated with the metal ions through the nitogen atom