Acta Cryst. (2009). E65, m1555  [ doi:10.1107/S1600536809045255 ]

Poly[triaqua(-butane-1,2,3,4-tetracarboxylato)dicadmium(II)]

C.-H. Ma and Y.-S. Yan

Abstract: The asymmetric unit of the title Cd^II coordination polymer, [Cd₂(C₈H₆O₈)(H₂O)₃]_n, contains two crystallographically independent Cd^II cations, one-half each of two independent anionic butane-1,2,3,4-tetracarboxylate units (L) and three water molecules. Both anionic units lie on inversion centers. One of the Cd^II ions is six-coordinated by four carboxylate O atoms from four L anions and two water O atoms in a distorted octahedral coordination environment. The other Cd^II ion is eight-coordinated by seven carboxylate O atoms from four L anions and one water O atom. The anionic units bridge neighboring Cd^II centers, forming a three-dimensional framework. O-HO hydrogen-bonding interactions between the water molecules and carboxylate O atoms further stabilize the structure.

Online 11 November 2009

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