Poly[[tetraaqua­bis(μ3-1H-benzimidazole-5,6-dicarboxyl­ato)dicobalt(II)] trihydrate]

Abstract

The title complex, {[Co2(C9H4N2O4)2(H2O)4]·3H2O}n, was synthesized hydro­thermally. The unique CoII ion is coordin­ated in a distorted octa­hedral coordination environment by two water mol­ecules and three symmetry-related 1H-benzimid­azole-5,6-dicarboxyl­ate (Hbidc) ligands. The Hbidc ligands coordinate via a bis-chelating and mono-chelating carboxyl­ate group and by an imidazole group N atom, bridging the CoII ions and forming an extended two-dimensional structure in the ab plane. In the crystal structure, inter­molecular N—H⋯O and O—H⋯O hydrogen bonds connect complex and solvent water mol­ecules, forming a three-dimensional supermolecular network. One of the solvent water mol­ecules lies on a twofold rotation axis