Bis{4-[(E)-2-(1H-indol-3-yl)ethen-yl]-1-methyl-pyridinium} 4-chloro-benzene-sulfonate nitrate.
In the title mixed salt, 2C16H15N2 (+)·C6H4ClO3S(-)·NO3 (-), one of the cations shows whole mol-ecule disorder over two sets of sites in a 0.711 (7):0.289 (7) ratio. The 4-chorobenzenesulfon-ate 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 anti-parallel manner approximately along the a-axis direction and linked with the anions via N-H⋯O hydrogen bonds and C-H⋯O inter-actions, generating a three-dimensional network. Weak C-H⋯π and π-π inter-actions [with centroid-centroid distances of 3.561 (2)-3.969 (7) Å] are also observed.
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Hoong-Kun
HK
Fun
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Ching Kheng
CK
Quah
Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand.
Nawong
N
Boonnak
Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand.
Suchada
S
Chantrapromma