Received 29 September 2010
In the title compound, C13H9NO4, the two carboxylic groups and the benzene ring are approximately co-planar with a maximum atomic deviation 0.175 (4) Å, while the pyridine ring is oriented at a dihedral angle of 31.07 (18)° with respect to the benzene ring. In the crystal, molecules are linked by O-HO, O-HN and weak C-HO hydrogen bonds, forming a three-dimensional supramolecular framework.
For background to carboxylic acids as supramolecular synthons, see: Desiraju (1995); Thalladi et al. (1996).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: XU5043 ).
We acknowledge the National Natural Science Foundation of China (grant No. 21001061), Liaocheng University Funds for Young Scientists (31805) and the Students Science and Technology Innovation Fund of Liaocheng University, China (SRT10058HX2).
Desiraju, G. R. (1995). Angew. Chem. Int. Ed. Engl. 34, 2311-2327.
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Siemens. (1996). SMART and SAINT. Siemens Analytical X-ray Systems, Inc., Madison, Wisconsin, USA.
Thalladi, V. R., Goud, B. S., Hoy, V. J., Allen, F. H., Howard, J. A. K. & Desiraju, G. R. (1996). Chem. Commun. pp. 401-402.