Crystal structure and UV spectra of a 1,2-disubstituted benzimidazolium chloride

The crystal structure of 3,3′-[1,4-phenylenebis(methylene)]bis(1-ethenyl-1H-imidazol-3-ium) dichloride – dichloromethane – water (1/1/1), C19H24Cl4N4O1

C19H24Cl4N4O1, triclinic, P 1 ‾ $P‾{1}$ (no. 2), a = 8.5930(4) Å, b = 12.0814(5) Å, c = 12.2430(5) Å, α = 69.805(2)°, β = 75.2820(10)°, γ = 86.733(2)°, V = 1153.07(9) Å3, Z = 2, R gt (F) = 0.0411, wR ref (F 2) = 0.1053, T = 296 K.

Inter-molecular inter-actions in a phenol-substituted benzimidazole

Hydrogen bonding plays an important role in the design of solid-state structures and gels with desirable properties. 1-(4-Hydroxybenzyl)-2-(4-hydroxyphenyl)-5,6-dimethyl-1H-benzimidazole was isolated as the acetone disolvate, C22H20N2O2·2C3H6O. O-H⋯N hydrogen bonding between benz-imidazole mol-ecules results in chains parallel to [010]. One of the acetone solvate mol-ecules participates in O-H⋯O hydrogen bonding with the benzimidazole derivative. C-H⋯π inter-actions are observed in the extended structure. Hirshfeld surface analysis was used to explore the inter-molecular inter-actions and density functional theory was used to estimate the strength of the hydrogen bonds.