title: 6-Methyl-2-phenyl-4,5-dihydro-pyridazin-3(2H)-one.
abstract: In the title mol-ecule, C(11)H(12)N(2)O, the pyridazine ring has a skew-boat conformation. The dihedral angle between the phenyl ring [r.m.s deviation = 0.0039 (15) Å] and the best mean-plane of the pyridazine ring [r.m.s deviations = 0.2629 (15) Å] is 53.27 (10)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds and C-H⋯π inter-actions involving the methyl group and the phenyl ring of a symmetry-related mol-ecule.
authors.forename: Hanan
authors.initials: H
authors.lastname: Sekkak
authors.forename: El Mostapha
authors.initials: el M
authors.lastname: Rakib
authors.forename: Hafid
authors.initials: H
authors.lastname: Zouihri