Inter­molecular inter­actions 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, C(22)H(20)N(2)O(2)·2C(3)H(6)O. O—H⋯N hydrogen bonding between benz­imidazole mol­ecules results in chains parallel to [010]. One of the acetone solvate mol­ecules participates in O—H⋯O hydrogen bonding with the benzimidazole derivative. C—H⋯π inter­actions are observed in the extended structure. Hirshfeld surface analysis was used to explore the inter­molecular inter­actions and density functional theory was used to estimate the strength of the hydrogen bonds.