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Acta Cryst. (2012). E68, o3  [ doi:10.1107/S1600536811050975 ]


A. Abou, A. Djandé, A. Saba, T. Chiavassa and R. Kakou-Yao

Abstract: In the title compound, C17H12O4, the six-membered heterocyclic ring adopts a distorted screw-boat conformation. The molecular structure exhibits an S(6) ring motif, owing to an intramolecular O-H...O hydrogen bond. In the crystal, weak C-H...O contacts generate an infinite chain along the c axis. There are also [pi]-[pi] stacking interactions between neighbouring isochromanedione benzene rings, with a centroid-centroid distance of 3.755 (1) Å, and C-O...[pi] interactions with an O...centroid distance of 3.964 (2) Å.

Online 3 December 2011

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