Acta Cryst. (2006). E62, m201-m203  [ doi:10.1107/S1600536805042819 ]

Poly[[tetra-₂-aqua-diaqua-₂-2,5-dibenzoylterephthalatodipotassium(I)] dihydrate]

D.-D. Wang, H.-J. Zhu, N. Shan, G.-L. Song and J.-T. Wang

Abstract: The title compound, {[K₂(C₂₂H₁₂O₆)(H₂O)₆]·2H₂O}_n, was prepared by slow evaporation of an aqueous solution of potassium dibenzoylterephthalate. The molecular complex contains two potassium cations, one 2,5-dibenzoylterephthalate anion, six coordinated water molecules and two uncoordinated water molecules. The 2,5-dibenzoylterephthalate anion lies on a center of symmetry. Each potassium cation is coordinated by seven O atoms, two from 2,5-dibenzoylterephthalate anions and the remainder from four bridging and one terminal water molecules. The uncoordinated water molecules are linked to the carboxylate O atoms and the coordinated water molecules by a network of intermolecular O-HO hydrogen bonds, forming a layer structure.

Online 7 January 2006

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