title: 2,2'-Dimethyl-1,1'-[2,2-bis-(bromo-methyl)propane-1,3-di-yl]dibenzimidazole hemihydrate.
abstract: The title compound, C(21)H(22)Br(2)N(4)·0.5H(2)O, contains two benzimidazole groups which may provide two potential coordination nodes for the construction of metal-organic frameworks. The mean planes of the two imidazole groups are almost perpendicular, with a dihedral angle of 83.05 (2)°, and adjacent mol-ecules are linked into a one-dimensional chain by π-π stacking inter-actions between imidazole groups of different mol-ecules [centroid-to-centroid distances of 3.834 (2) and 3.522 (2) Å].
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013,  People's Republic of China.
authors.forename: Xing
authors.initials: X
authors.lastname: Wang
authors.forename: Chun-Bo
authors.initials: CB
authors.lastname: Liu
authors.forename: Shen-Tang
authors.initials: ST
authors.lastname: Wang
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Yan
authors.forename: Ling
authors.initials: L
authors.lastname: Liu