Received 20 November 2011
In the title compound, C13H10N2O4, the nitro N atom deviates by 0.031 (2) Å from the plane of the benzene ring to which it is attached. The aromatic rings are oriented at a dihedral angle of 50.6 (1)°. An intramolecular N-HO hydrogen bond occurs. In the crystal, inversion dimers are formed by pairs of O-HO interactions.
For the use of the title compound as an intermediate in the synthesis pharmacologically important compounds, see: Kelleher et al. (2007). For the synthesis, see: Rewcastle et al. (1987). For bond-length data, see: Allen et al. (1987).
Data collection: CAD-4 EXPRESS (Enraf-Nonius, 1994); cell refinement: SET4 (Enraf-Nonius, 1994); data reduction: MolEN (Harms & Wocadlo,1995); 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: IM2343 ).
The authors thank the Center of Testing and Analysis, Nanjing University, for support.
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1-19.
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Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.
Kelleher, J. M., Mc Auliffe, M. T., Moynihan, H. A. & Mullins, M. D. (2007). Arkivoc, xvi, 209-226.
Rewcastle, G. W., Denny, W. A. & Baguley, B. C. (1987). J. Med. Chem. 30, 843-851.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.