title: 1-(4-Bromo-benz-yl)-2-(4-bromo-phen-yl)-1H-benzimidazole.
abstract: There are two mol-ecules in the asymmetric unit of the title compound, C20H14Br2N2. In the first, the dihedral angles between the mean plane of the benzimidazole group and those of the 4-bromo-benzyl and 4-chloro-phenyl groups are 50.72 (17) and 71.29 (16)°, respectively, while the corresponding angles in the second mol-ecule are 42.09 (16) and 89.05 (17)°. The 4-bromo-benzyl and 4-bromo-phenyl groups make an angle of 68.1 (2) and 85.1 (21)° with each other in the two mol-ecules. In the crystal, weak C-H⋯N and C-H⋯Br hydrogen bonds link the mol-ecules along the c-axis direction. Br⋯Br inter-actions [3.5733 (9)Å] are also observed.
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, No. 58, Haishu Road, Hangzhou, 311121, People's Republic of China.
authors.forename: Hua-Jun
authors.initials: HJ
authors.lastname: Ma
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, No. 58, Haishu Road, Hangzhou, 311121, People's Republic of China.
authors.forename: Zhi-Rong
authors.initials: ZR
authors.lastname: Qu