title: Crystal structure of pyriproxyfen.
abstract: In the title compound {systematic name: 4-phen-oxy-phenyl (RS)-2-[(pyridin-2-yl)-oxy]propyl ether}, C20H19NO3, which is a juvenile hormone mimic and insecticide, the dihedral angles between the plane of the central benene ring and those of the pendant pyridine ring and phenyl ring are 78.09 (6) and 82.14 (8)°, respectively. The conformation of the O-C-C-O linkage is gauche [torsion angle = -75.0 (2)°]. In the crystal, weak aromatic π-π stacking inter-actions [centroid-centroid separation = 3.8436 (13) Å] and C-H⋯π inter-actions link adjacent mol-ecules, forming a three-dimensional network.
authors.affiliation: Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Gihaeng
authors.initials: G
authors.lastname: Kang
authors.affiliation: Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Jineun
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Hyunjin
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Tae Ho
authors.initials: TH
authors.lastname: Kim
keywords: crystal structure; ether; insecticide; juvenile hormone mimic; pyriproxyfen; π–π stacking