Received 21 November 2012
In the title compound, C12H8Cl2N2O4S, the C-S-N-C torsion angle is 49.34 (18)° and the dihedral angle between the benzene rings is 71.92 (10)°. The amide H atom exhibits bifurcated hydrogen bonding. The N-H bond is syn to the ortho-nitro group enabling the formation of an S(7) loop. In the crystal, pairs of N-HO(S) hydrogen bonds link the molecules into inversion dimers via R22(8) rings.
For studies on the effects of substituents on the structures and other aspects of N-(aryl)-amides, see: Gowda & Weiss (1994); Shahwar et al. (2012), of N-arylsulfonamides, see: Chaithanya et al. (2012) and of N-chloroarylsulfonamides, see: Shetty & Gowda (2004). For hydrogen-bonding patterns and motifs, see: Adsmond et al. (2001).
Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell refinement: CrysAlis CCD; data reduction: CrysAlis RED (Oxford Diffraction, 2009); 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: TK5173 ).
UC thanks Mangalore University for the award of a research fellowship. BTG thanks the University Grants Commission, Government of India, New Delhi, for a special grant under the UGC-BSR one-time grant to faculty.
Adsmond, D. A. & Grant, D. J. W. (2001). J. Pharm. Sci. 90, 2058-2077.
Chaithanya, U., Foro, S. & Gowda, B. T. (2012). Acta Cryst. E68, o2823.
Gowda, B. T. & Weiss, A. (1994). Z. Naturforsch. Teil A, 49, 695-702.
Oxford Diffraction (2009). CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Yarnton, England.
Shahwar, D., Tahir, M. N., Chohan, M. M., Ahmad, N. & Raza, M. A. (2012). Acta Cryst. E68, o1160.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Shetty, M. & Gowda, B. T. (2004). Z. Naturforsch. Teil B, 59, 63-72.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.