Received 4 October 2012
In the title compound, K+·C6H4BrN2O4S-·H2O, the K+ ion is hepta-coordinated by two O atoms from two different water molecules, three sulfonyl O atoms from three N-bromo-2-nitro-benzenesulfonamidate anions and two nitro O atoms from two N-bromo-2-nitro-benzenesulfonamidate anions. The S-N distance of 1.576 (4) Å is consistent with an S=N double bond. The crystal structure is stabilized by intermolecular O-HN and O-HBr hydrogen bonds which link the molecules into polymeric layers running parallel to the bc plane.
For the preparation of metal salts of N-haloarylsulfonamides, see: Gowda & Mahadevappa (1983); Usha & Gowda (2006). For studies on the effect of substituents and metal ions on the structures of N-haloarylsulfonamides, see: George et al. (2000); Gowda et al. (2011a,b); Olmstead & Power (1986). For positioning of water H atoms, see: Nardelli (1999).
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: ZL2509 ).
BTG thanks the University Grants Commission, Government of India, New Delhi, for a one-time grant to Faculty/Professors under UGC-BSR.
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