Acta Cryst. (2004). E60, m535-m537  [ doi:10.1107/S1600536804007779 ]

Poly[diaqua(₆-benzene-1,2,4,5-tetracarboxylato)(₆-2,5-dicarboxybenzene-1,4-dicarboxylato)dilanthanum(III)]

Y.-H. Wen, J. Zhang, Z.-J. Li, Y.-Y. Qin, Y. Kang, R.-F. Hu, J.-K. Cheng and Y.-G. Yao

Abstract: The title compound, [La₂(betc)(H₂betc)(H₂O)₂]_n (betc = benzene-1,2,4,5-tetracarboxylate, C₁₀H₂O₄, and H₂betc is 2,5-dicarboxybenzene-1,4-dicarboxylate, C₁₀H₄O₄) was obtained by hydrothermal reaction. The compound possesses an infinite three-dimensional network structure. The central La^III atom is nine-coordinate by eight carboxylate O atoms from six different organic ligands derived from H₄betc (1,2,4,5-benzenetetracarboxylic acid), with La-O distances ranging from 2.439  (4) to 2.658  (4)  Å, and one water molecule, with La-OW1 = 2.503  (5)  Å.

Online 9 April 2004

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