Acta Cryst. (2009). E65, m1643-m1644  [ doi:10.1107/S1600536809048284 ]

Poly[[diaqua(₄-1H-benzimidazole-5,6-dicarboxylato)strontium] monohydrate]

W.-D. Song, H. Wang, J.-H. Liu, X.-T. Ma and S. W. Ng

Abstract: Each of the carboxylate -CO₂ fragments of the dianion ligand in the title compound, {[Sr(C₉H₄N₂O₄)(H₂O)₂]·H₂O}_n, chelates to a Sr^II atom and at the same time, one of the two O atoms coordinates to a third Sr^II atom. The ₄-bridging mode of the dianion generates a square-grid layer motif; adjacent layers are connected by O-HO, O-HN and N-HO hydrogen bonds, forming a three-dimensional network. The eight-coordinate Sr atom exists in a distorted square-antiprismatic geometry. The crystal studied was a non-merohedral twin with a minor twin component of 24%.

Online 21 November 2009

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