organic compounds
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The asymmetric unit of the title compound, C36H32N22+·2I−, consists of one half-molecule of the cation and one I− anion. The cation is located on an inversion centre. The dihedral angle between the pyridinium ring and the naphthalene ring system in the asymmetric unit is 19.01 (14)°. In the crystal, the cations and the anions are linked by C—HI interactions into a layer parallel to the bc plane. Intra- and intermolecular π–π interactions with centroid–centroid distances of 3.533 (2)–3.807 (2) Å are also observed.