4-{(1E,3E)-4-[4-(Dimethylamino)phenyl]buta-1,3-dien-1-yl}-1-methylpyridin-1-ium iodide

Abstract

The title molecular salt, C18H21N2+·I−, consists of a pyridinium cation and an I−anion. The cation exists in anE,Econformation with respect to the two C=C double bonds, and is roughly planar with the pyridinium ring being inclined to the benzene ring by 10.8 (2) °. In the crystal, the ions are linked by a C—H...I hydrogen bond, and the cations are linked by C—H...π interactions, forming zigzag chains propagating along [010].