1,3-Dibenzyl-2-methyl­benzimidazolium chloride

The cation of the title salt, C22H21N2 +·Cl−, contains a planar benzimidazolium unit (r.m.s. deviation = 0.02 Å); the phenyl rings of the benzyl substituents form dihedral angles of 68.2 (1) and 79.7 (1)° with the plane of the benzimidazolium fragment

1,3-Diallyl-2-methyl­benzimidazolium bromide dihydrate

The bonds in the five-membered ring of the title hydrated salt, C14H17N2 +·Br−·2H2O, are delocalized. The cation lies on a special position of m site symmetry such that the mirror plane passes through the imidazol­yl–methyl bond and is perpendicular to the plane of the cation. The anion lies on another special position of 2 site symmetry. The anion and uncoordinated water mol­ecule are linked into a chain by O—H⋯O hydrogen bonds. One of the water O atoms is disordered over two sites of equal occupancy

1,1′-Dibenzyl-5,5′′-dichloro-1,1′′,2,2′′-tetra­hydro­dispiro­[indole-3,7′-[6,9]diaza­tricyclo­[7.3.0.02,6]dodecane-8′,3′′-indole]-2,2′′-dione

In the title compound, C38H34Cl2N4O2, the piperazine ring adopts a chair conformation. The pyrrolidine rings that are fused to the piperazine ring adopt envelope conformations (in which the C atoms connecting the two rings represent the flap). The indoline ring systems are approximately planar (r.m.s. deviations = 0.026 and 0.034 Å) and are aligned at a dihedral angle of 54.98 (3)°

5,5′′-Dibromo-1,1′′-bis­(prop-2-en-1-yl)-1,1′′,2,2′′-tetra­hydro­dispiro­[indole-3,7′-[6,9]diaza­tricyclo­[7.3.0.02,6]dodecane-8′,3′′-indole]-2,2′′-dione

In the mol­ecule of the title compound, C30H30Br2N4O2, the piperazine ring adopts a chair conformation. The pyrrolidine rings that are fused to the piperazine ring adopt envelope conformations (in which the N atom represents the flap). The indoline fused-ring systems are nearly planar (r.m.s. deviations = 0.009 and 0.019 Å); the two fused rings are aligned at 60.63 (6)°

2-[3-(1H-Benzimidazol-2-yl)prop­yl]-1-decyl-1H-benzimidazole

The asymmetric unit of the title compound, C27H36N4, contains two independent mol­ecules. Except for the atoms of the decyl chain, the non-H atoms of each mol­ecule are approximately coplanar (r.m.s. deviations = 0.075 and 0.164 Å) and the –CH2CH2CH2– link connecting the two benzimidazolyl fused-ring systems is slightly opened up at the middle C atom. The decyl substituent adopts an extended zigzag conformation in both mol­ecules. In the crystal, adjacent mol­ecules inter­act by N—H⋯N hydrogen bonds, generating a chain parallel to the c axis