title: (4Z)-4-[(4-Chloro-anilino)(phen-yl)methyl-ene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.
abstract: The title compound, C(23)H(18)ClN(3)O, was synthesized by the reaction of 4-chloro-aniline and 4-benzoyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one. The terminal benzene rings are twisted at dihedral angles of 48.3 (2), 71.4 (2) and 36.1 (2)° with respect to the central eight-atom methyl-pyrazolone/amino-methyl-ene unit. An intra-molecular N-H⋯O hydrogen bond stabilizes the planar conformation [mean deviation = 0.0398 (5) Å] of the central unit, generating an S(6) ring motif. The crystal packing is stabilized by van der Waals forces.
authors.affiliation: Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Chi
authors.forename: Jing
authors.initials: J
authors.lastname: Xiao
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Yin
authors.forename: Min
authors.initials: M
authors.lastname: Xia