Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 12 (December 2013)

organic compounds

Acta Cryst. (2013). E69, o1753-o1754    [ doi:10.1107/S1600536813030080 ]

Bis{4-[(E)-2-(1H-indol-3-yl)ethen­yl]-1-methyl­pyridinium} 4-chloro­benzene­sulfonate nitrate

H.-K. Fun, C. K. Quah, N. Boonnak and S. Chantrapromma

Abstract: In the title mixed salt, 2C16H15N2+·C6H4ClO3S-·NO3-, one of the cations shows whole mol­ecule disorder over two sets of sites in a 0.711 (7):0.289 (7) ratio. The 4-chorobenzenesulfon­ate anion is also disordered over two orientations in a 0.503 (6):0.497 (6) ratio. The cations are close to planar, the dihedral angles between the pyridinium and indole rings being 1.48 (3)° in the ordered cation, and 5.62 (3) and 2.45 (3)°, respectively, for the major and minor components of the disordered cation. In the crystal, the cations are stacked in an anti­parallel manner approximately along the a-axis direction and linked with the anions via N-H...O hydrogen bonds and C-H...O inter­actions, generating a three-dimensional network. Weak C-H...[pi] and [pi]-[pi] inter­actions [with centroid-centroid distances of 3.561 (2)-3.969 (7) Å] are also observed.

CCDC reference: 969918

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