Acta Cryst. (2010). E66, m1007  [ doi:10.1107/S1600536810028771 ]

Hexaaquacobalt(II) 3,3'-dicarboxybiphenyl-4,4'-dicarboxylate

Y.-H. Zhang, J.-M. Han and Z.-Z. Li

Abstract: In the crystal structure of the title compound, [Co(H₂O)₆](C₁₆H₈O₈), both the cation and anion are centrosymmetric. The Co cation displays a CoO₆ octahedral geometry formed by six water molecules. In the anion, the two carboxyl groups are oriented at dihedral angles of 4.8 (5) and 10.4 (7)° with respect to the benzene ring. Very strong O-HO hydrogen bonds between the protonated and deprotonated carboxylate groups occur. Neighbouring cations and anions are connected through O-HO hydrogen bonds into a three-dimensional supramolecular structure.

Online 24 July 2010

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