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Acta Cryst. (2013). E69, o1623-o1624
[ doi:10.1107/S1600536813027244 ]

1-Methyl-4-[(E)-2-(3-hy­droxy-4-meth­oxy­phen­yl)ethen­yl]pyridinium 4-bromo­benzene­sulfonate monohydrate

S. Chantrapromma, P. Ruanwas, B. Jindawong and H.-K. Fun

Abstract: In the title hydrated salt, C15H16NO2+·C6H4BrO3S-·H2O, the cation exists in an E conformation with respect to the ethenyl bond and is almost planar, with a dihedral angle of 2.62 (12)° between the planes of the pyridinium and benzene rings. The meth­oxy substituent deviates slightly from the plane of its attached benzene ring [Cmeth­yl-O-C-C torsion angle = -11.6 (6)°]. In the crystal, the cations, anion and water mol­ecules are linked together into chains along [010] by O-H...O hydrogen bonds and weak C-H...O inter­actions. There is a short Br...O contact [3.029 (2) Å]. The crystal structure also features C-H...[pi] inter­actions involving the benzene ring of the anion.


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