Acta Cryst. (2010). E66, m1036-m1037  [ doi:10.1107/S1600536810029570 ]

Sodium quercetin-8-sulfonate trihydrate

X. Zhang, Y. Li, P. Chen, T. Han and W. Zhao

Abstract: The organic anion of the title compound, {[Na(C₁₅H₉O₁₀S)(H₂O)₂]·H₂O}_n {systematic name: poly[[diaqua[-2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4-oxo-4H-chromene-8-sulfonato]sodium] monohydrate]}, has a nearly planar structure. The Na atom is six-coordinated by O atoms, two from water molecules and four from the anion. The dihedral angle between the ring systems in the anion is 10.1 (1)°. Intramolecular O-HS and O-HO interactions occur. In the crystal structure, an extensive network of classical intermolecular O-HS and O-HO hydrogen bonds forms layers along the c axis.

Online 31 July 2010

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