Potassium N-bromo-2-chloro­benzene­sulfonamidate sesquihydrate

In the structure of the title compound, K(+)·C(6)H(4)BrClNO(2)S(−)·1.5H(2)O, the K(+) ion is hepta­coordinated by three O atoms from water mol­ecules and by four sulfonyl O atoms of N-bromo-2-chloro­benzene­sulfonamidate anions. The S—N distance of 1.582 (4) Å is consistent with an S=N double bond. The crystal structure is stabilized by inter­molecular O—H⋯Br and O—H⋯N hydrogen bonds. The asymmetric unit consits of one potassium cation, one N-bromo-2-chloro­benzene­sulfonamidate anion and one water mol­ecule in general positions and one water mol­ecule located on a twofold rotation axis.