Received 7 August 2013
In the title compound, C15H14ClNO2S2, the 2H-chromene ring system is essentially planar, with a maximum deviation of 0.0133 (10) Å. Three C atoms and their attached H atoms of the pyrrolidine ring are disordered [occupany ratio 0.874 (7):0.126 (7)] with both disorder components adopting a twisted conformation. The dihedral angle between the 2H-chromene ring system and the major occupancy component of the pyrrolidine ring is 89.45 (7)°. In the crystal, inversion dimers linked by pairs of C-HS and C-HO interactions generate R22(24) and R22(10) loops, respectively. Further C-HO hydrogen bonds link the dimers into  chains. C-H interactions also occur and there is very weak - stacking [interplanar spacing = 3.650 (5) Å; centroid-centroid distance = 4.095 (7) Å] between inversion-related chlorobenzene rings.
For biological applications of coumarins and dithiocarbamates, see: Brillon (1992); Burns et al. (2010); Kawaii et al. (2001); Khan et al. (2004); Yu et al. (2003). For details of the synthesis and a related structure with comparison bond lengths, see: Mahabaleshwaraiah et al. (2012).
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: PK2494 ).
The authors acknowledge the Universities Sophisticated Instrumental Centre, Karnatak University, Dharwad, for CCD X-ray facilities, single-crystal X-ray diffractometer, GCMS, IR, CHNS and NMR data. NMM is grateful to Karnatak Science College, Dharwad, for providing laboratory facilities. He is also thankful to P. C. Jabin Science College, Hubli and UGC for permission to do research under FIP.
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