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Acta Cryst. (2012). E68, m1440-m1441
[ doi:10.1107/S1600536812043760 ]

catena-Poly[[[diaqua(1,10-phenanthroline-[kappa]2N,N')cobalt(II)]-[mu]-1H-benzimidazole-5,6-dicarboxylato-[kappa]2N3:O6] sesquihydrate}

D.-B. Xu, Y. Fang, D.-L. Jiang, Y. Zhu and M. Chen

Abstract: In the title compound, {[Co(C9H4N2O4)(C12H8N2)(H2O)2]·1.5H2O}n, the CoII atom is hexacoordinated by one N atom and one O atom from two symmetry-related 1H-benzimidazole-5,6-dicarboxylate ligands, two N atoms from one 1,10-phenanthroline ligand (phen) and two water molecules. The dihedral angle between the 1H-benzimidazole-5,6-dicarboxylate and 1,10-phenanthroline ligands is 74.41 (4)°. The crystal packing is governed by intermolecular O-H...O and N-H...O hydrogen-bonding interactions. All water (coordinating and lattice) molecules take part in the hydrogen-bonding interactions. In addition, there are [pi]-[pi] stacking interactions between inversion-related phen ligands, the shortest centroid-centroid distance being 3.7536 (16) Å. One of the two lattice water molecules shows half-occupancy.

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