3-Methyl-5,5-diphenylimidazolidine-2,4-dione

In the title molecule, C16H14N2O2, the imidazolidine-2,4-dione ring carries two phenyl substituents at the 5-position inclined to the five-membered ring plane by 59.17 (6) and 53.21 (6)°. In the crystal, the molecules form chains parallel to the a-axis direction through N—H...O hydrogen bonds. These chains are linked into a three-dimensional network of molecules stacked along a through C—H...π(ring) interactions

3-n-Pentyl-5,5-diphenylimidazolidine-2,4-dione

In the title compound, C20H22N2O2, the central five-membered imidazolidine ring makes dihedral angles of 63.85 (6) and 70.38 (6)° with the two substituent phenyl rings. In the crystal, molecules form an inversion dimer through a pair of N—H...O hydrogen bonds. These are linked into a three-dimensional network via C—H...O hydrogen bonds. The n-pentyl chain is disordered over two sites, with an occupancy ratio of 0.876 (2):0.124 (2)

5,5-Diphenyl-3-propylimidazolidine-2,4-dione

The asymmetric unit of the title compound, C18H18N2O2, consists of two independent molecules differing primarily in the orientation of the propyl substituent. One of the propyl groups is disordered over two positions with an occupancy ratio of 0.859 (2):0.141 (2). The two independent molecules are associated through a C—H...π(ring) interaction and sheets parallel to (011) are formed from further sets of C—H...π(ring) interactions. The sheets are connected via inversion-related N—H...O hydrogen bonds

3-Ethyl-5,5-diphenylimidazolidine-2,4-dione

In the title molecule, C17H16N2O2, the phenyl rings attached at the 5-position of the imidazolidine-2,4-dione ring are inclined to the five-membered ring by 60.03 (5) and 63.04 (5)°. In the crystal, N—H...O and C—H...O hydrogen bonds form chains along the a-axis direction, which are connected in pairs by additional C—H...O hydrogen bonds. The chains are tied together by C—H...π(ring) interactions

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

4,4-Diphenyl-1-propyl-2-propylsulfanyl-4,5-dihydro-1H-imidazol-5-one

In the title molecule, C21H24N2OS, the five-membered ring is planar with an r.m.s. deviation of 0.0142 Å. The phenyl rings are inclined to the plane of the dihydroimidazolone ring by 60.81 (6) and 79.23 (6)°. In the crystal, inversion dimers are formed by a C—H...O hydrogen bond and a C—H...π(ring) interaction. Additional C—H...O hydrogen bonds and C—H...π(ring) interactions connect these dimers into chains along the c-axis direction