Acta Cryst. (2012). E68, o853 [ doi:10.1107/S1600536812006897 ]
Abstract: The title compound, C9H10N2O4·H2O, was obtained as a zwitterion derived from the nucleophilic attack of 3-aminopyridine on the fumaric ,-system. Within the molecule, the aminopyridine moiety and the carboxylate and carboxylic acid fragments form dihedral angles of 68.6 (2) and 62.8 (2)°, respectively. The geometry adopted by the molecule does not allow the formation of centrosymmetric dimeric hydrogen-bonded units; instead chains along the a axis are linked by COO-HOOC motifs. These chains are interconnected by N-HO and O-HO hydrogen bonds involving the carboxylic acid and carboxylate units and the solvent water molecules.
Online 24 February 2012
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