Synthesis, crystal structure and Hirshfeld surface analysis of 2-[(4-hy-droxy-phen-yl)amino]-5,5-diphenyl-1 H -imidazol-4(5 H )-one.

In the title mol-ecule, C 21 H 17 N 3 O 2 , the five-membered ring is slightly ruffled and dihedral angles between the pendant six-membered rings and the central, five-membered ring vary between 50.78 (4) and 86.78 (10)°. The exocyclic nitro-gen lone pair is involved in conjugated π bonding to the five-membered ring. In the crystal, a layered structure is generated by O-H⋯N and N-H⋯O hydrogen bonds plus C-H⋯π(ring) and weak π-stacking inter-actions.