Acta Cryst. (2011). E67, o488 [ doi:10.1107/S1600536811002248 ]
Abstract: In the zwitterionic molecule of the title compound, C10H7N3O4·H2O, one carboxyl group is deprotonated and the pyridine N atom is protonated. The pyridinium and imidazole rings form a dihedral angle of 5.23 (1)°. An intramolecular O-HO hydrogen bond occurs. In the crystal, intermolecular N-HO, O-HN and O-HO hydrogen bonds link the zwitterions and water molecules into sheets parallel to (102).
Online 26 January 2011
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