Received 14 July 2013
There are two independent molecules in the asymmetric unit of the title compound, C16H15NO3S2, in which the pyrrolidine rings adopt envelope conformations, with a methylene C atom as the flap. The dihedral angles betweeen the near-planar 2H-chromene ring systems [maximum deviations = 0.0167 (20) and 0.0136 (19) Å] and the pyrrolidine rings (all atoms) are 83.83 (11) and 82.43 (11)°. In the crystal, inversion dimers linked by pairs of C-HO hydrogen bonds occur for one of the molecules. Further C-HO links involving both molecules generate a three-dimensional network.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB7109 ).
The authors thank the Universities Sophisticated Instrumental Centre, Karnatak University, Dharwad, for the CCD X-ray facilities, the X-ray data collection and the GCMS, IR, CHNS and NMR data. KMM is grateful to Karnatak Science College, Dharwad, for providing laboratory facilities.
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Mahabaleshwaraiah, N. M., Kumar, K. M., Kotresh, O., Al-eryani, W. F. A. & Devarajegowda, H. C. (2012). Acta Cryst. E68, o1566.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.