Synthesis, crystal structure and Hirshfeld surface analysis of 3-ethyl-2-(methylsulfanyl)-5,5-diphenyl-3H-imidazol-4(5H)-one (Thiophenytoin analogue)

In the title molecule, 3-ethyl-2-(methylsulfanyl)-5,5-diphenyl-3 H -imidazol-4(5 H )-one, C 18 H 18 N 2 OS, the two substituent phenyl rings are inclined of 59.50 (7) and 83.53 (8)° with respect to the plane of the five-membered ring. The S -methyl group lies in this plane while the ethyl group is nearly perpendicular to it. In the crystal, weak C—H...O hydrogen bonds form inversion dimers, which pack via conventional van der Waals contacts. A Hirshfeld surface analysis was performed, showing the predominance of H...H and C...H/H...C contacts.