Synthesis, crystal structure and Hirshfeld surface analysis of 2-[(4-hydroxyphenyl)amino]-5,5-diphenyl-1H-imidazol-4(5H)-one

In the title molecule, 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 nitrogen 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 interactions.