title: Crystal structure of (4Z)-1-(3,4-di-chloro-phen-yl)-4-[hy-droxy(4-methyl-phen-yl)methyl-idene]-3-methyl-4,5-di-hydro-1H-pyrazol-5-one.
abstract: The title compound, C18H14Cl2N2O2, crystallizes with two mol-ecules, A and B, in the asymmetric unit. In mol-ecule A, the dihedral angles between the central pyrazole ring and pendant di-chloro-benzene and p-tolyl rings are 2.18 (16) and 46.78 (16)°, respectively. In mol-ecule B, the equivalent angles are 27.45 (16) and 40.45 (18)°, respectively. Each mol-ecule features an intra-molecular O-H⋯O hydrogen bond, which closes an S(6) ring and mol-ecule A also features a C-H⋯O inter-action. In the crystal, weak C-H⋯π interactions and aromatic π-π stacking [shortest centroid-centroid separation = 3.707 (2) Å] generate a three-dimensional network.
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Naresh
authors.initials: N
authors.lastname: Sharma
authors.affiliation: Department of Chemistry, Faculty of Science, The M.S. University of Baroda, Vadodara 390 002, India.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Parihar
authors.affiliation: Department of Chemistry, Faculty of Science, The M.S. University of Baroda, Vadodara 390 002, India.
authors.forename: R N
authors.initials: RN
authors.lastname: Jadeja
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Rajni
authors.initials: R
authors.lastname: Kant
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Vivek K
authors.initials: VK
authors.lastname: Gupta
keywords: C—H⋯π inter­actions; Schiff-base pyrazole derivative; aromatic π–π stacking; crystal structure; hydrogen bonding