Acta Cryst. (2007). E63, m1828-m1829  [ doi:10.1107/S1600536807025901 ]

Poly[[tetraaqua(₆-benzene-1,2,4,5-tetracarboxylato)dicobalt(II)] dihydrate]

Y.-H. Liu and M.-T. Ding

Abstract: The asymmetric unit of the title coordination polymer, {[Co₂(C₁₀H₂O₈)(H₂O)₄]·2H₂O}_n, contains two crystallographically distinct Co^II cations, located on inversion centers. Each Co^II cation exists in an octahedral coordination environment formed by two water molecules and four carboxylate groups. The deprotonated benzene-1,2,4,5-tetracarboxylic acid ligand, with the center of the benzene ring located on an inversion center, bridges Co^II cations to form a (3,4)-connected three-dimensional network that is topologically related to Pt₃O₄ (waserite). O-HO hydrogen bonding between coordinated water molecules and carboxylate groups helps to stabilize the crystal structure. One water molecules is disordered over two positions, with almost equal occupancies.

Online 8 June 2007

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