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Acta Cryst. (2012). E68, o67-o68  [ doi:10.1107/S1600536811052433 ]

2,2'-[2,4-Bis(naphthalen-1-yl)cyclobutane-1,3-diyl]bis(1-methylpyridinium) diiodide: thermal-induced [2 + 2] cycloaddition reaction of a heterostilbene

S. Chantrapromma, K. Chanawanno, N. Boonnak and H.-K. Fun

Abstract: 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-H...I interactions into a layer parallel to the bc plane. Intra- and intermolecular [pi]-[pi] interactions with centroid-centroid distances of 3.533 (2)-3.807 (2) Å are also observed.

Online 10 December 2011

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