title: (4Z)-4-[(2E)-1-Hydr-oxy-3-(4-methoxy-phen-yl)prop-2-en-ylidene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.
abstract: The title compound, C(20)H(18)N(2)O(4), is a chalcone derivative of pyrazole. The pyrazole ring is inclined at a dihedral angle of 19.29 (12)° to the methoxy-phenyl ring mean plane, and by 1.19 (13)° to the phenyl ring. The mol-ecular structure is stabilized by an intra-molecular O-H⋯O hydrogen bond, making an almost planar (r.m.s. deviation = 0.0243 Å) six membered ring.
authors.affiliation: Institute of Chemistry, University of the Punjab, New Campus, Lahore, Pakistan.
authors.forename: Khizar Iqbal
authors.initials: KI
authors.lastname: Malik
authors.forename: Munawar Ali
authors.initials: MA
authors.lastname: Munawar
authors.forename: Misbahul Ain
authors.initials: MA
authors.lastname: Khan
authors.forename: Sohail
authors.initials: S
authors.lastname: Nadeem
authors.lastname: Mukhtar-Ul-Hassan