Received 14 November 2012
aDepartment of Laboratory Center for Medical Sciences, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, People's Republic of China,bJiuquan Institute for Food and Drug Control, Jiuquan 735000, Gansu Province, People's Republic of China, and cInstitute of Medicinal Chemistry, School of Pharmacy, Lanzhou University, Lanzhou 730000, Gansu Province, People's Republic of China
Correspondence e-mail: email@example.com
In the title hydroxamic acid derivative, C22H16Cl2N2O5, the nitro-substituted benzene ring forms dihedral angles of 26.95 (15) and 87.06 (15)°, with the 4-chloro- and 2-chloro-substituted benzene rings, respectively. The dihedral angle between the chloro-substituted benzene rings is 68.19 (13)°. The O atoms of the nitro group were refined as disordered over two sets of sites with equal occupancies. In the crystal, weak C-HO(=C) hydrogen bonds link molecules along .
For applications of hydroxamic acid derivatives, see: Noh et al. (2009); Zeng et al. (2003). For the synthesis, see: Ayyangark et al. (1986). For related structures, see: Zhang et al. (2012); Ma et al. (2012).
Data collection: CrysAlis PRO (Agilent, 2011); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH5558 ).
This work was supported by the Natural Science Fund Projects of Gansu Province (0710RJZA124).
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Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
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Zhang, H., Qu, D. & Ma, J. (2012). Acta Cryst. E68, o2904.