The crystal structure of a monoclinic modification of 4‐cyano‐N‐[2‐(p‐methoxyphenyl)‐ethyl]pyridinium iodide, C15H18IN2O

The modification of 4-cyano-N-[2-(p-methoxyphenyl)ethyl]pyridinium iodide investigated is monoclinic, space group Cc, Z = 4, cell dimensions a = 11.853, b = 12.485, c = 11.281 A, β = 114.21°. The conformation of the molecule is gauche about the central CC bond with a dihedral angle of 68°. The crystal structure does not explain the intramolecular charge transfer bands observed in the UV absorption spectrum.