Acta Cryst. (2011). E67, o867-o868  [ doi:10.1107/S1600536811008610 ]

1-Methyl-2-[(E)-2,4,5-trimethoxystyryl]pyridinium 4-methoxybenzenesulfonate monohydrate

H.-K. Fun, C. Mueangkeaw, P. Ruanwas and S. Chantrapromma

Abstract: In the title compound, C₁₇H₂₀NO₃⁺·C₇H₇O₄S^-·H₂O, the cation exists in an E configuration with respect to the C=C bond and is twisted with a dihedral angle of 17.81 (8)° between the pyridinium and benzene rings. The benzene ring of the anion is almost parallel to the pyridinium ring [dihedral angle = 3.45 (9)°], whereas it is inclined to the benzene ring of the cation [dihedral angle = 17.62 (8)°]. The crystal structure is stabilized by O-HO hydrogen bonds and weak C-HO interactions which link the cations, anions and water molecules into chains along the a axis. - interactions with centroid-centroid distances of 3.7751 (9) and 3.7920 (11) Å are also observed.

Online 12 March 2011

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