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Acta Cryst. (2014). E70, o510-o511
[ doi:10.1107/S160053681400645X ]

2,2'-[2,4-Bis(naphthalen-1-yl)cyclo­butane-1,3-di­yl]bis­(1-methyl­pyridinium) bis­(4-chloro­benzene­sulfonate): 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 salt, C36H32N22+·2C6H4ClO3S-, consists of one anion and one half-cation, the other half being generated by inversion symmetry. The dihedral angle between the pyridinium ring and the napthalene ring system in the asymmetric unit is 42.86 (6)°. In the crystal, cations and anions are linked by weak C-H...O inter­actions into chains along [010]. Adjacent chains are further arranged in an anti­parallel manner into sheets parallel to the bc plane. [pi]-[pi] inter­actions are observed involving the cations, with centroid-centroid distances of 3.7664 (8) and 3.8553 (8) Å.

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