Received 22 September 2013
aDepartment of Physics, M. N. M. Jain Engineering College, Chennai 600 097, India,bDepartment of Physics, Presidency College, Chennai 600 005, India, and cDepartment of Physics, CPCL Polytechnic College, Chennai 600 068, India
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In the title hydrated salt, C6H7N2O2+·C7H5O6S-·H2O, the benzene ring of the cation makes a dihedral angle of 1.32 (19)° with the attached nitro group. In the anion, an intramolecular O-HO hydrogen bond with an S(6) ring motif is formed between the carboxyl and hydroxy groups; the dihedral angle between the carboxyl group and the benzene ring is 8.76 (8)°. The crystal structure exhibits intermolecular N-HO, O-HO, C-HO, and - [centroid-centroid distances = 3.6634 (9) and 3.7426 (9) Å] interactions to form a three-dimensional network.
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; 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: IS5308 ).
The authors thank SAIF, IIT, Madras, for the data collection. MKK thanks the Council of Scientific and Industrial Research, New Delhi, India, for providing financial support [project No.03 (1200)/11/EMR-II].
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