title: 1-(4-Fluoro-phen-yl)-5-(4-methoxy-phen-yl)pyrazolidin-3-one.
abstract: In the mol-ecule of the title compound, C(16)H(15)FN(2)O(2), the benzene rings are oriented at a dihedral angle of 88.61 (3)°. The five-membered ring adopts an envelope conformation. Intra-molecular C-H⋯N hydrogen bonds result in the formation of two planar five-membered rings. In the crystal structure, inter-molecular N-H⋯O and C-H⋯F hydrogen bonds link the mol-ecules, forming R(2) (2)(8) and R(2) (2)(18) ring motifs. Weak C-H⋯π inter-actions may further stabilize the structure.
authors.forename: Bao-Jiang
authors.initials: BJ
authors.lastname: Dai
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Liu
authors.forename: Qing-Bing
authors.initials: QB
authors.lastname: Xu
authors.forename: Jing
authors.initials: J
authors.lastname: Hu
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Zhu