title: 6-Isopropyl-3-phenyl-5-(p-tol-yloxy)-3H-1,2,3-triazolo[4,5-d]pyrimidin-7(6H)-one: whole-mol-ecule disorder.
abstract: The title compound, C(20)H(19)N(5)O(2), exhibits whole-mol-ecule disorder the refined ratios of the two components being 0.57 (2):0.43 (2). In the major component, the essentially planar [maximum deviation 0.033 (17) Å] fused pyrimidine and triazole ring system forms a dihedral angle of 10.5 (3)° with the phenyl ring, while in the minor component of disorder this angle is 27.5 (5)°. The crystal structure is stabilized by π-π stacking inter-actions between symmetry-related triazole and pyrimidine rings, with centroid-centroid distances of 3.594 (10) Å.
authors.forename: Xiao-Hua
authors.initials: XH
authors.lastname: Zeng
authors.forename: Shou-Heng
authors.initials: SH
authors.lastname: Deng
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Wang
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Gao