Acta Cryst. (2007). E63, m2115-m2116  [ doi:10.1107/S1600536807033144 ]

Sodium N-bromo-2,4-dichlorobenzenesulfonamidate sesquihydrate

B. T. Gowda, M. Tokarcík, J. Kozísek and H. Fuess

Abstract: The title compound [systematic name: ₂-aqua-diaquabis(₃-N-bromo-2,4-dichlorobenzenesulfonamidato)disodium(I)], Na⁺·C₆H₃BrCl₂NO₂S^-·1.5H₂O, crystallizes with two sodium cations, two N-bromo-2,4-dichlorobenzenesulfonamidate anions and three water molecules in the asymmetric unit, similar to sodium N-bromobenzenesulfonamidate, sodium N-bromo-4-chlorobenzenesulfonamidate and sodium N-bromo-2-methyl-4-chlorobenzenesulfonamidate. A crystallographic twofold rotation axis passes through one of the water molecules. There is no interaction between the nitrogen atoms and sodium ions. The sodium ion shows octahedral coordination by three O atoms of water molecules and by three sulfonyl O atoms of three different N-bromo-2,4-dichlorobenzenesulfonamidate anions. The S-N distance of 1.590 (6) Å is consistent with an S=N double bond. The Na⁺ ion coordination in the structure gives rise to several hydrogen bonds between water molecules and N or Br atoms.

Online 13 July 2007

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