Acta Cryst. (2001). E57, o764-o766  [ doi:10.1107/S1600536801012041 ]

Gallic acid monohydrate

N. Okabe, H. Kyoyama and M. Suzuki

Abstract: In the crystal structure of the title compound, 3,4,5-trihydroxybenzoic acid monohydrate, C₇H₆O₅·H₂O, the gallic acid molecule is essentially planar and has two intramolecular hydrogen bonds between hydroxyl groups. The H atoms of the three hydroxyl groups are oriented in the same direction around the ring, and form intra- and intermolecular hydrogen bonds. The crystal structure is stabilized by all available intermolecular hydrogen bonds, including also those involving the water molecule.

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