Ethyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl)acetate

The five-membered ring of the title compound, C19H18N2O4, adopts an envelope conformation. In the crystal, pairwise N—H...O hydrogen bonds form centrosymmetric dimers which are connected into chains parallel to the c-axis direction by pairwise C—H...O hydrogen bonds. A second set of C—H...O hydrogen bonds links these chains into sheets oriented parallel to (100). A combination of additional C—H...O hydrogen bonds and C—H...π(ring) interactions combine the sheets into a three-dimensional network

1-Benzyl-2-benzylsulfanyl-4,4-diphenyl-4,5-dihydro-1H-imidazol-5-one

The asymmetric unit of the title compound, C29H24N2OS, consists of two independent molecules having markedly different orientations of the substituents on the central imidazole ring. Apart from a weak C—H...S hydrogen bond, the intermolecular interactions in the crystal are all of the C—H...π(ring) type and form a three-dimensional network. One of the phenyl rings is disordered over two sets of sites in 0.713 (9): 0.287 (9) ratio