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Acta Cryst. (2012). E68, o2749
[ doi:10.1107/S1600536812035854 ]

2-Amino-5-(4-carboxylatophenyl)pyridinium monohydrate

X.-H. Wei, H. Yan and W.-G. Lin

Abstract: The title compound, C12H10N2O2·H2O, crystallizes as a zwitterion in which the pyridine N atom is protonated and the carboxy -OH group is deprotonated. The benzene and pyridinium rings are inclined with a dihedral angle of 6.63 (5)° between them. In the crystal, intermolecular O-H...O and N-H...O hydrogen-bonding interactions link adjacent molecules into a two-dimensional double layered supramolecular network.

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