Acta Cryst. (2005). E61, m407-m409  [ doi:10.1107/S1600536805002588 ]

Twinned poly[[diaquacalcium(II)]-₄-benzene-1,3-dioxyacetato]

S. Gao, L.-H. Huo, J.-W. Liu and S. W. Ng

Abstract: The water-coordinated Ca atom in the layer structure of the title compound, [Ca(C₁₀H₈O₆)(H₂O)₂]_n, is connected to a carboxyl O atom of one -O-CH₂-CO₂ arm of the dicarboxylate dianion; it is also linked to an O atom of a carboxylate group of this arm of an adjacent dianion, as well as to the O atoms of the other arm of two different dianions. The six-coordinate octahedral geometry is distorted, owing to a weak interaction with the ether O atom of one of the arms; the dianion functions in a ₄-bridging mode.

Online 29 January 2005

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