Received 9 September 2012
The title compound, C12H10N2O2·H2O, crystallizes as a zwitterion in which the pyridine N atom is protonated and the carboxyl OH group is deprotonated. The benzene and pyridinium rings are inclined at a dihedral angle of 54.93 (1)°. In the crystal, O-HO and N-HO hydrogen bonds link the molecules into a three-dimensional supramolecular network.
Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker,1999); data reduction: SAINT); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JJ2152 ).
Bruker (1999). SMART and SAINT. Bruker AXS Inc., Wisconsin, USA.
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Tang, L., Fu, F., Wu, Y. P., Hou, X. Y. & Gao, L. J. (2011). J. Coord. Chem. 64, 3146-3157.
Zhong, R. Q., Zou, R. Q., Du, M., Jiang, L., Yamada, T., Maruta, G., Takeda, S. & Xu, Q. (2008). CrystEngComm, 10, 605-613.