Received 14 September 2013
In the title compound, C12H8N2O5, the aromatic rings are inclined to one another by 56.14 (7)°. The nitro groups are inclined by to the benzene rings to which they are attached by 3.86 (17) and 9.65 (15)°. In the crystal, molecules are linked by C-HO hydrogen bonds, forming a three-dimensional structure. The title compound is a new monoclinic polymorph, crystallizing in space group P21/c. The first polymorph crystallized in space group C2/c and the molecule possesses twofold rotation symmetry. Two low-temperature structures of this polymorph (150 K and 100 K, respectively) have been reported [Meciarova et al. (2004). Private Communication (refcode IXOGAD). CCDC, Cambridge, England, and Dey & Desiraju (2005). Chem. Commun. pp. 2486-2488].
Data collection: APEX2 (Bruker 1998); cell refinement: SAINT (Bruker 1998); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2012 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: DS2235 ).
The authors are grateful to the Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan, and the Chemistry Department, Loughborough University, Loughborough, UK, for providing laboratory and analytical facilities.
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Meciarova, M., Toma, S., Podlesna, J., Kiripolsky, M. & Cisarova, I. (2004). Private Communication (refcode IXOGAD). CCDC, Cambridge, England.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Sheldrick, G. M. (2012). SADABS. University of Göttingen, Germany.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.