title: 1-[5-(3,4-Dichlorophenyl)-3-(2-naphthyl)-4,5-dihydropyrazol-1-yl]ethanone.
abstract: In the title compound, C(21)H(16)Cl(2)N(2)O, the central pyrazoline ring makes dihedral angles of 90.1 (3) and 7.8 (3)°, with the pendant benzene ring and naphthalene ring system, respectively. In the crystal structure, weak C-H⋯O inter-actions lead to chains of mol-ecules.
authors.forename: Zhi-Ke
authors.initials: ZK
authors.lastname: Lu
authors.forename: Shen
authors.initials: S
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Feng