Received 11 April 2012
The title molecule, C5H4ClN3O2, possesses mirror symmetry, with all of the atoms lying in the mirror plane. There is an intramolecular N-HO hydrogen bond involving the adjacent -NO2 and -NH2 groups. A short C-HO interaction is also observed. In the crystal, adjacent molecules are linked via N-HCl and N-HN hydrogen bonds, forming chains propagating along .
For details concerning the importance of the title compound as an intermediate in organic synthesis, and for the synthetic procedure, see: Hu et al. (2011). For bond-length data, see: Allen et al. (1987).
Data collection: CAD-4 Software (Enraf-Nonius, 1985); cell refinement: CAD-4 Software; data reduction: XCAD4 (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: SU2408 ).
The authors thank the Center of Testing and Analysis, Nanjing University, for the data collection.
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