Synthesis and Characterization of 2-Amino-5-benzoylbenzimidazole Complexes of Manganese(II) and Cobalt(II)

Abstract

Several complexes of 2-amino-5-benzoylbenzimidazole (ABBI) with Mn(II) and Co(II) using different anions, Cl^–, Br^–, I^–, NO₃⁻, CH₃COO^–, HCOO^–, ClO₄⁻ and SO₄²⁻ have been isolated as stable, non-hygroscopic solids and characterized systematic analytical procedures such as cation-anion estimation, elemental analyses, conductivity, magnetic susceptibility and spectral studies have been employed to elucidate the structure with the composition, [M(ABBI)₂X₂] where M = Co(II) or Mn(II) and X = Cl^–, Br^–, I^–, NO₃⁻, CH₃COO^–, HCOO^–, ClO₄⁻ and SO₄²⁻. The overall investigations confirm the bidenticity of the ligand, the coordinated nature of the anions and the distorted octahedral geometry of all these complexes studies.