title: 1-Methyl-2-({[(1-methyl-1H-benzimid-azol-2-yl)meth-yl](phen-yl)amino}-meth-yl)1H-benzimidazol-3-ium picrate.
abstract: In the title molecular salt, C(24)H(24)N(5) (+)·C(6)H(2)N(3)O(7) (-), 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 intra-molecular N-H⋯N hydrogen bond is observed.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Fan
authors.initials: F
authors.lastname: Kou
authors.forename: Fei
authors.initials: F
authors.lastname: Jia
authors.forename: Jingkui
authors.initials: J
authors.lastname: Yuan
authors.forename: Huilu
authors.initials: H
authors.lastname: Wu