title: Crystal structure of (4E)-4-(8-meth-oxy-2H-chromen-2-yl-idene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one.
abstract: In the title compound, C20H16N2O3, the phenyl substituent attached to the pyrazole ring makes a dihedral angle of 4.87 (7)° with the rest of the mol-ecule. In the crystal, mol-ecules are connected into inversion dimers of the R 2 (2)(14) type by pairs of C-H⋯O inter-actions. π-π inter-actions exist between the benzene and pyrazole rings at a distance of 3.701 (1) Å. Similarly, π-π inter-actions are present at a centroid-centroid distance of 3.601 (1) Å between the oxygen-containing heterocyclic ring and meth-oxy substituted aromatic ring of a neighbouring mol-ecule. Additional C-H⋯π and C=O⋯π inter-actions are also observed.
authors.affiliation: Department of Chemistry, University of the Punjab, Lahore, Punjab, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Salim
authors.affiliation: Department of Chemistry, University of the Punjab, Lahore, Punjab, Pakistan.
authors.forename: Munawar Ali
authors.initials: MA
authors.lastname: Munawar
authors.affiliation: Department of Physics, University of Sargodha, Sargodha, Punjab, Pakistan.
authors.forename: Muhammad Nawaz
authors.initials: MN
authors.lastname: Tahir
authors.affiliation: Department of Chemistry, University of the Punjab, Lahore, Punjab, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Shahid
authors.affiliation: Department of Chemistry, University of the Punjab, Lahore, Punjab, Pakistan.
authors.forename: Khizar Iqbal
authors.initials: KI
authors.lastname: Malik
keywords: crystal structure; pyrazolone; π–π inter­actions