(E)-4-[4-(Dimethylamino)styryl]-1-methylpyridinium 4-bromobenzenesulfonateThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

(E)-4-[4-(Dimethylamino)styryl]-1-methylpyridinium 4-bromobenzenesulfonateThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

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In the title compound, C16H19N2+·C6H4BrO3S−, the cation is nearly planar, with a dihedral angle Trouser of 3.19 (15)° between the pyridinium and the dimethylaminophenyl rings, and exists in the trans configuration.In the crystal packing, the cations and anions are linked into chains parallel to the c axis.

These chains are stacked along the b axis.The crystal is stabilized by weak C—H.O and C—H.

π interactions, and a π–π interaction is Lighting also observed with a Cg.Cg distance of 3.5675 (19) Å.