Acta Cryst. (2007). E63, o233-o235  [ doi:10.1107/S1600536806049178 ]

1,3,8-Trihydroxy-6-methylanthraquinone monohydrate

J.-C. Zhu, Y. Liang, H.-S. Wang, Y.-M. Pan and Y. Zhang

Abstract: The title compound, C₁₅H₁₀O₅·H₂O, also known as emodin monohydrate, was isolated from the roots of Polygonum cuspidatum Sieb. et Zucc. It is an anthraquinone derivative, and all of its non-H atoms are essentially coplanar. Intramolecular O-HO hydrogen bonds and intermolecular O-HO and C-HO hydrogen bonds are observed in this crystal form. The crystal structure is further stabilized by weak - interactions and hydrogen bonds to the water molecule.

Online 13 December 2006

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