Experimental Crystal data

R factor = 0.030; wR factor = 0.079; data-to-parameter ratio = 19.3. The asymmetric unit of the title compound, C16H19N2 +I3, contains a (E)-2-[4-(dimethylamino)styryl)-1-methylpyridin-ium 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 – interactions with a centroid–centroid distance of 3.5757 (13) Å. The triiodide anions are located between the cations. The crystal structure is further consoli-dated by short C C [3.322 (9)–3.3952 (19) Å] contacts. Related literature For background to and applications of pyridinium compounds