Acta Cryst. (2005). E61, m417-m419  [ doi:10.1107/S1600536805002801 ]

catena-Poly[[[tetraaqua(3-carboxy-4-hydroxybenzenesulfonato)strontium(II)]-₃-3-carboxy-4-hydroxybenzenesulfonato] dihydrate]

S. Gao, L.-H. Huo, Z.-B. Zhu and J.-R. Li

Abstract: The title complex, {[Sr(C₇H₅O₆S)₂(H₂O)₄]·2H₂O}_n, exists as a ladder chain of Sr^II ions connected by 3-carboxy-4-hydroxybenzenesulfonate anions through ₂-sulfonate and carboxyl groups, and solvent water molecules, forming a three-dimensional hydrogen-bonded framework. The Sr^II ion exhibits a distorted square antiprismatic coordination geometry defined by three O atoms of two sulfonate groups, one carboxyl O and four water molecules. The 3-carboxy-4-hydroxybenzenesulfonate anions show two types of coordination to strontium, viz. ₂-sulfonate + monodentate-carboxyl bridging and monodentate sulfonate-O coordination.

Online 5 February 2005

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