Acta Cryst. (2005). E61, o1480-o1482  [ doi:10.1107/S1600536805012237 ]

Pyrimethaminium sulfosalicylate monohydrate

M. Hemamalini, P. T. Muthiah, B. Sridhar and R. K. Rajaram

Abstract: In the crystal structure of the title compound, 2,4-diamino-5-(4-chlorophenyl)-6-ethylpyrimidin-1-ium 3-carboxy-4-hydroxybenzenesulfonate monohydrate, C₁₂H₁₄ClN₄⁺·C₇H₅O₆S^-·H₂O, the asymmetric unit contains two crystallographically independent protonated pyrimethamine (PMN) molecules, a pair of sulfosalicylate anions and two water molecules. Both the PMN molecules are protonated at one of the pyrimidine N atoms. The component species interact through numerous intermolecular N-HO, N-HN and O-HO hydrogen bonds and C-HO interactions.

Online 27 April 2005

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