title: Crystal structure of 1,3-dimethyl-3-phenyl-pyrrolidine-2,5-dione: a clinically used anti-convulsant.
abstract: In the title compound, C12H13NO2, the five-membered ring has an envelope conformation; the disubstituted C atom lies out of the mean plane through the four other ring atoms (r.m.s. deviation = 0.0038 Å) by 0.1877 (18) Å. The plane of the phenyl substituent is practically perpendicular to that of the planar part of the five-membered ring, with a dihedral angle of 87.01 (5)°. In the crystal, mol-ecules are linked by weak C-H⋯O hydrogen bonds, forming inversion dimers. The dimers are linked by further C-H⋯O hydrogen bonds, as well as carbon-yl-carbonyl attractive inter-actions [O⋯C = 3.2879 (19) Å], forming a three-dimensional framework structure.
authors.affiliation: Department of Chemistry & Biology, New Mexico Highlands University, 803 University Avenue, Las Vegas, NM 87701, USA.
authors.forename: Carlos
authors.initials: C
authors.lastname: Ordonez
authors.affiliation: Department of Engineering Photonics, St Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), 49 Kronverkskiy Avenue, St Petersburg 197101, Russian Federation.
authors.forename: Ilia M
authors.initials: IM
authors.lastname: Pavlovetc
authors.affiliation: X-Ray Structural Centre, A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, B-334, Moscow 119991, Russian Federation.
authors.forename: Victor N
authors.initials: VN
authors.lastname: Khrustalev
keywords: anti­convulsant; crystal structure; methsuximide; succinimide; α-substituted cyclic imide