Crystal structure of fluroxypyr

Hyunjin Park; Myong Yong Choi; Eunjin Kwon; Tae Ho Kim

doi:10.1107/S2056989016018533

Crystal structure of fluroxypyr

Acta Crystallogr E Crystallogr Commun. 2016 Nov 25;72(Pt 12):1836-1838. doi: 10.1107/S2056989016018533. eCollection 2016 Dec 1.

Authors

Hyunjin Park¹, Myong Yong Choi¹, Eunjin Kwon¹, Tae Ho Kim¹

Affiliation

¹ Department of Chemistry (BK21 plus) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea.

Abstract

In the title pyridine herbicide {systematic name: 2-[(4-amino-3,5-di-chloro-6-fluoro-pyridin-2-yl)-oxy]acetic acid}, C₇H₅Cl₂FN₂O₃, the mean plane of the carb-oxy-lic acid substituent and the pyridyl ring plane subtend a dihedral angle of 77.5 (1)°. In the crystal, pairs of O-H⋯O hydrogen bonds form inversion dimers with R₂²(8) ring motifs. These are extended into chains along [011] by N-H⋯F hydrogen bonds. In addition, inter-molecular N-H⋯O hydrogen bonds and weak π-π inter-actions [ring centroid separation = 3.4602 (9) Å] connect these chains into a three-dimensional network.

Keywords: crystal structure; fluroxypyr; herbicide; hydrogen bonds; pyridine.