(E)-2-[4-(Dimethylamino)styryl]-1-methylpyridinium triiodide

The asymmetric unit of the title compound, C16H19N2+·I3−, contains a (E)-2-[4-(dimethylamino)styryl)-1-methylpyridinium cation and half each of two triiodide anions. The complete triiodide anions are each generated by inversion symmetry. The planar cation has all of its eighteen non-H atoms situated on a mirror plane. In the crystal, the cations are stacked along the b axis by π–π interactions with a centroid–centroid distance of 3.5757 (13) Å. The triiodide anions are located between the cations. The crystal structure is further consolidated by short C...C [3.322 (9)–3.3952 (19) Å] contacts