Potassium N-bromo-4-chlorobenzenesulfonamidate monohydrate

In the structure of the title compound, K+·C6H4BrClNO2S−·H2O, the K+ cation is heptacoordinated. It is connected to two water O atoms, four sulfonyl O atoms and one Br atom. Further, the sulfonyl and water O atoms in the structure are bridged in a bidentate fashion. The S—N distance of 1.584 (6) Å is consistent with an S—N double bond, The crystal structure is stabilized by intermolecular O—H⋯N hydrogen bonds.

In the structure of the title compound, K + ÁC 6 H 4 BrClNO 2 S À Á-H 2 O, the K + cation is heptacoordinated. It is connected to two water O atoms, four sulfonyl O atoms and one Br atom. Further, the sulfonyl and water O atoms in the structure are bridged in a bidentate fashion. The S-N distance of 1.584 (6) Å is consistent with an S-N double bond, The crystal structure is stabilized by intermolecular O-HÁ Á ÁN hydrogen bonds.
The S-N distance of N1-S1, 1.584 (6) Å is consistent with an S-N double bond and is in agreement with the observed values of 1.582 (4) Å in (II), 1.588 (2)Å in (III), and N1-S1, 1.574 (5)Å and N2-S2 1.579 (4)Å in (IV). K + ion coordination in the structure gives rise to several hydrogen bonding between coordinated water molecules and nitrogen atoms. The packing diagram consists of a two-dimensional polymeric layer running parallel to the b-axis (Fig. 2).

Experimental
The title compound was prepared similar to the literature method (Gowda & Usha, 2003). The purity of the compound was checked by determining its melting point (184 ° C). It was characterized by recording its infrared and NMR spectra.
Yellow prisms of the title compound used in X-ray diffraction studies were obtained from its aqueous solution at room temperature.

Refinement
The O bound H atoms were located in difference map and later restrained to O-H = 0.82 (2) Å The other H atoms were positioned with idealized geometry using a riding model with C-H = 0.93 Å. All H atoms were refined with isotropic displacement parameters (set to 1.2 times of the U eq of the parent atom).