Acta Cryst. (2009). E65, m1108-m1109  [ doi:10.1107/S1600536809032486 ]

Poly[[diaqua(3-carboxy-5-nitrobenzoato)(-5-nitrobenzene-1,3-dicarboxylato)neodymium(III)] 2.5-hydrate]

N.-N. Raime, R. Adnan, M. M. Rosli and H.-K. Fun

Abstract: In the title compound, {[Nd(C₈H₃NO₆)(C₈H₄NO₆)(H₂O)₂]·2.5H₂O}_n, the Nd^II ion is nine-coordinated by seven O atoms from five carboxylate groups and two water molecules. The [Nd(C₈H₃NO₆)(H₂O)₂]²⁺ units are bridged by 5-nitroisophthalate dianions, forming polymeric sheets parallel to the ab plane. The polymeric sheets are linked into a three-dimensional network by O-HO and C-HO hydrogen bonds, and - interactions [centroid-centroid distance = 3.5533 (11) Å]. The 5-nitroisophthalate(1-) anion is disordered over three positions with an occupancy ratio of 0.68:0.23:0.09. Two of the uncoordinated water molecules are disordered over two positions, with occupancy ratios of 0.722 (15):0.278 (15) and 0.279 (6):0.221 (6), respectively.

Online 22 August 2009

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