Molecules of 1,2-bis(4-bromophenyl)-1H-benzimidazole, C19H12Br2N2, (I), and 2-(4-bromophenyl)-1-(4-nitrophenyl)-1H-benzimidazole, C19H12BrN3O2, (II), are arranged in dimeric units through C—H...N and parallel-displaced π-stacking interactions favoured by the appropriate disposition of N- and C-bonded phenyl rings with respect to the mean benzimidazole plane. The molecular packing of the dimers of (I) and (II) arises by the concurrence of a diverse set of weak intermolecular C—X...D(X= H, NO2;D= O, π) interactions.
1,2-双(4-溴苯基)-1H-苯并咪唑 C19H12Br2N2 (I) 和 2-(4-溴苯基)-1-(4-硝基苯基)-1H-苯并咪唑 C19H12BrN3O2 (II) 分子通过 C-H.N 键和 C 键苯基环相对于苯并咪唑平均平面的适当位置有利于 N 键和 C 键的平行错位 π 堆积相互作用。(I)和(II)二聚体的分子堆积是由多种微弱的分子间 C-X...D(X= H,NO2;D= O,π)相互作用共同作用产生的。