Acta Cryst. (2009). E65, m822-m823  [ doi:10.1107/S1600536809023794 ]

Hexakis(1H-imidazole-N³)cobalt(II) triaquatris(1H-imidazole-N³)cobalt(II) bis(naphthalene-1,4-dicarboxylate)

J.-J. Nie, J.-H. Li and D.-J. Xu

Abstract: The asymmetric unit of the title compound, [Co(C₃H₄N₂)₆][Co(C₃H₄N₂)₃(H₂O)₃](C₁₂H₆O₄)₂, contains two halves of crystallographically independent Co^II complex cations, each assuming a distorted octahedral geometry, and one uncoordinated naphthalene-1,4-dicarboxylate dianion. One Co^II cation is located on an inversion center and is coordinated by six imidazole molecules, while the other Co^II cation is located on a twofold rotation axis and is coordinated by three water and three imidazole molecules. The uncoordinated naphthalene-1,4-dicarboxylate dianion links both Co^II complex cations via O-HO and N-HO hydrogen bonding. One imidazole ligand is equally disordered over two sites about a twofold rotation axis, while the coordinated N atom of the imidazole is located on the twofold rotation axis. One water O atom has site symmetry 2.

Online 27 June 2009

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