title: Poly[[tetraaqua-bis(μ(3)-1H-benzimidazole-5,6-dicarboxyl-ato)dicobalt(II)] trihydrate].
abstract: The title complex, {[Co(2)(C(9)H(4)N(2)O(4))(2)(H(2)O)(4)]·3H(2)O}(n), was synthesized hydro-thermally. The unique Co(II) ion is coordin-ated in a distorted octa-hedral coordination environment by two water mol-ecules and three symmetry-related 1H-benzimid-azole-5,6-dicarboxyl-ate (Hbidc) ligands. The Hbidc ligands coordinate via a bis-chelating and mono-chelating carboxyl-ate group and by an imidazole group N atom, bridging the Co(II) ions and forming an extended two-dimensional structure in the ab plane. In the crystal structure, inter-molecular N-H⋯O and O-H⋯O hydrogen bonds connect complex and solvent water mol-ecules, forming a three-dimensional supermolecular network. One of the solvent water mol-ecules lies on a twofold rotation axis.
authors.affiliation: Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, People's Republic of China.
authors.forename: Jun-Dan
authors.initials: JD
authors.lastname: Fu
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Tang
authors.forename: Ming-Yue
authors.initials: MY
authors.lastname: Yuan
authors.forename: Yi-Hang
authors.initials: YH
authors.lastname: Wen