Acta Cryst. (2008). E64, o691  [ doi:10.1107/S1600536808006065 ]

2-Hydroxy-3-methoxybenzoic acid monohydrate

Z.-Q. Fang, R.-H. Zeng, M. Yang, H. Liu and X.-L. Chen

Abstract: The asymmetric unit of the title compound, C₈H₈O₄·H₂O, contains two organic molecules which are connected by the two water molecules through O-HO hydrogen bonds, forming an R₄⁴(12) ring. Further O-HO hydrogen bonds assemble these rings through R₆⁶(18) rings, giving rise to infinite helical chains arranged around the b axis. These helical chains are assembled by offset - stacking interactions [centroid-centroid distance = 3.6432 (8) Å] between the aromatic rings of neigboring chains, forming a supramolecular network.

Online 12 March 2008

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