title: 1-(4-Isopropyl-phen-yl)-5-(4-methoxy-phen-yl)pyrazolidin-3-one.
abstract: In the mol-ecule of the title compound, C(19)H(22)N(2)O(2), the pyrazolidinone ring has an envelope conformation, with the C atom attached to the 4-methoxy-phenyl ring displaced by 0.354 (3) Å from the plane of the other ring atoms. The 4-iso-propyl-phenyl ring is oriented with respect to the 4-meth-oxy-phenyl ring at a dihedral angle of 88.94 (3)°. Intra-molecular C-H⋯N hydrogen bonds result in the formation of two planar five-membered rings, which are oriented with respect to the adjacent 4-isopropyl-phenyl and 4-meth-oxy-phenyl rings at dihedral angles of 4.05 (3) and 0.50 (3)°, respectively. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.
authors.affiliation: Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors.forename: Hong-Sheng
authors.initials: HS
authors.lastname: Jia
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Li
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Liu
authors.forename: Shan
authors.initials: S
authors.lastname: Liu
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Zhu