title: 1-{3-(4-Chloro-phen-yl)-5-[4-(propan-2-yl)phen-yl]-4,5-di-hydro-1H-pyrazol-1-yl}ethanone.
abstract: In the title compound, C20H21ClN2O, the dihedral angles between the pyrazole ring (r.m.s. deviation = 0.049 Å) and the benzene and chloro-benzene rings are 84.65 (10) and 3.35 (10)°, respectively. In the crystal, inversion dimers linked by pairs of weak C-H⋯O inter-actions generate R 2 (2)(16) loops. Weak π-π stacking inter-actions [centroid-centroid distance = 3.8490 (11) Å] are also observed.
authors.affiliation: Department of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India.
authors.forename: B
authors.initials: B
authors.lastname: Narayana
authors.affiliation: Department of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India.
authors.forename: Vinutha V
authors.initials: VV
authors.lastname: Salian
authors.affiliation: Department of Studies in Chemistry, Industrial Chemistry Section, Mangalore University, Mangalagangotri 574 199, India.
authors.forename: Balladka K
authors.initials: BK
authors.lastname: Sarojini
authors.affiliation: Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
authors.forename: Jerry P
authors.initials: JP
authors.lastname: Jasinski