title: 1,3-Bis(4-methyl-benz-yl)pyrimidine-2,4(1H,3H)-dione.
abstract: In the title mol-ecule, C(20)H(20)N(2)O(2), the central pyrimidine ring forms dihedral angles of 71.9 (1) and 69.8 (1)° with the two benzene rings. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds link mol-ecules into centrosymmetric dimers. The crystal packing exhibits also π-π inter-actions as indicated by short distances of 3.674 (2) Å between the centroids of the pyrimidine rings of neighbouring mol-ecules.
authors.affiliation: College of Chemistry and Chemical Engineering, Xuchang University, Xuchang, Henan Province 461000, People's Republic of China.
authors.forename: Gong-Chun
authors.initials: GC
authors.lastname: Li
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Song
authors.forename: Li-Ke
authors.initials: LK
authors.lastname: Zhang
authors.forename: Jiao-Jiao
authors.initials: JJ
authors.lastname: Cui
authors.forename: Feng-Ling
authors.initials: FL
authors.lastname: Yang