2-(4-Hydroxystyryl)-1-methylpyridinium 4-bromobenzenesulfonate

Abstract

The title compound, C14H14NO+·C6H4BrSO3−, (I), crystallizes in a non-centrosymmetric space group and exhibits non-linear optical properties. The second-harmonic generation (SHG) effect of (I) is about 0.14 times that of urea. The cation is almost planar and exists in an E configuration. The pyridinium and benzene rings of the cation make a dihedral angle of 4.52 (8)°. The dihedral angles between the benzene ring of the anion and the mean planes through the pyridinium and benzene rings of the cation are 67.06 (8) and 71.56 (8)°, respectively. In the crystal structure, the cations and anions are linked by O—H⋯O hydrogen bonds and weak C—H⋯O inter­actions into a three-dimensional network. C—H⋯π inter­actions are also observed in the crystal structure.