Complexes of Copper (II), Cobalt (II) and Nickel (II) with Substituted Benzimidazoles

Abstract

A series of complexes of the general formulae MLX₂(M = Cu; X = Cl, Br; L = 2–(2´–quinolyl) benzimidazole (2–QylBzIH), 2,2´–bis (benzimidazyl) sulphide (bBzIH₂s); 2,2´–bis (benzimidazyl) ethane (bBzIH₂e); M = Co; X = Cl, Br, I; L = bBzIH₂s, M = Co; X = Cl, Br; L = bBzIH₂e and M = Ni; X = Cl, Br; L = bBzIH₂e) have been prepared and characterised by conductivity, magnetic susceptibility, electronic, IR and far-IR-spectra. The infrared spectral data support the involvement of pyridine nitrogen (s) rather than the imino nitrogen(s) in the complex formation. The results favour square planar structure for copper (II) and tetrahedral structure for cobalt (II) and nickel (II) complexes.