Date Published: July 01, 2011
Publisher: International Union of Crystallography
Author(s): Bin Liu, Fan Kou, Fei Jia, Jingkui Yuan, Huilu Wu.
In the title molecular salt, C24H24N5+·C6H2N3O7−, the dihedral angle between the benzimidazole rings of the cation is 5.041 (2)°. In the anion, the three nitro groups make dihedral angles of 2.468 (3), 12.795 (3) and 24.958 (4)° with respect to the central ring. In the crystal, weak aromatic π–π stacking [centroid–centroid distance = 3.599 (15) Å] consolidates the packing. In addition, an intramolecular N—H⋯N hydrogen bond is observed.
For background to proton-transfer compounds, see: Aghabozorg et al. (2008 ▶) and to benzimidazoles, see: Ram et al. (1992 ▶). For the biological activivity of benzimidazoles, see: Baraldi et al. (2004 ▶); Göker et al. (2002 ▶); Jayasekera et al. (2005 ▶); Starčević et al. (2007 ▶).