Acta Cryst. (2011). E67, o1144 [ doi:10.1107/S1600536811013389 ]
Abstract: The asymmetric unit of the title compound, C19H12O5, contains two independent molecules, both slightly buckled along an axis passing through the C=O bonds of the anthraquinone ring system (r.m.s. deviation of non-H atoms = 0.082 and 0.148 Å): the benzene rings are twisted to each other by 4.3 (3)°in one molecule and 10.6(3)° in the other. In both molecules, the hydroxy group forms an intramolecular O-HO hydrogen bond. The two independent molecules interact by - stacking with a centroid-centroid distance of 3.539 (2) Å between hydroxybenzene rings of adjacent molecules.
Online 16 April 2011
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