Acta Cryst. (2006). E62, m87-m89  [ doi:10.1107/S1600536805040341 ]

catena-Poly[[aquadiimidazolecadmium(II)]--thiophene-2,5-dicarboxylato]

Z.-P. Deng, S. Gao, L.-H. Huo and H. Zhao

Abstract: The Cd^II atom has distorted pentagonal bipyramidal coordination geometry in the coordination polymer [Cd(TDA)(Him)₂(H₂O)]_n [where TDA^2- is the thiophene-2,5-dicarboxylate dianion (C₆H₂O₄S^2-) and Him is imidazole (C₃H₄N₂)]. The cadmium ion is bound by four carboxylate O atoms from two independent TDA^2- groups, two N atoms from two different imidazole ligands, and one water molecule. The carboxylate groups bind in bidentate mode to the Cd center, forming a linear chain structure such that the closest CdCd distance is 10.577 (6) Å. The polymeric chains are connected via hydrogen bonds and - stacking interactions into a three-dimensional network.

Online 10 December 2005

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