title: Crystal structure of 4-[(2,4-di-chloro-phen-yl)(5-hy-droxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)meth-yl]-5-methyl-2-phenyl-2,3-di-hydro-1H-pyrazol-3-one.
abstract: In the title compound C27H22Cl2N4O2, the pyrazol-5-ol ring makes a dihedral angle of 34.80 (11)° with the phenyl ring to which it is bound, while the pyrazolone ring is inclined at 34.34 (12)° to its attached phenyl ring. In the crystal, N-H⋯O and C-H⋯Cl hydrogen bonds link the mol-ecules into chains along [010]. Inter-molecular π-π inter-actions are observed between the pyrazolone ring and the phenyl ring bound to the pyrazol-5-ol ring system [centroid-centroid separation = 3.916 (2) Å].
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006 , India.
authors.forename: Balbir
authors.initials: B
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, University of Jammu, Jammu Tawi 180 006 , India.
authors.forename: Hitesh
authors.initials: H
authors.lastname: Mahajan
authors.affiliation: Department of Chemistry, University of Jammu, Jammu Tawi 180 006 , India.
authors.forename: Satya
authors.initials: S
authors.lastname: Paul
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: crystal structure; hydrogen bonding; pyrazolone; π–π inter­actions