title: Crystal structure of propaquizafop.
abstract: The title compound, C22H22ClN3O5 {systematic name: 2-(propan-2-yl-idene-amino-oxy)ethyl (R)-2-[4-(6-chloro-quin-oxalin-2-yl-oxy)phen-oxy]propionate}, is a herbicide. The asymmetric unit comprises two independent mol-ecules in which the dihedral angles between the phenyl ring and the quinoxaline ring plane are 75.93 (7) and 82.77 (8)°. The crystal structure features C-H⋯O, C-H⋯N, and C-H⋯Cl hydrogen bonds, as well as weak π-π inter-actions [ring-centroid separation = 3.782 (2) and 3.5952 (19) Å], resulting in a three-dimensional architecture.
authors.affiliation: Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Republic of Korea.
authors.forename: Youngeun
authors.initials: Y
authors.lastname: Jeon
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: Sangjin
authors.initials: S
authors.lastname: Lee
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; herbicide; hydrogen bonding; propaquizafop; π–π inter­actions