Synthesis, Characterization, X-ray Crystal Structure and Herbicidal Activity of (E)-2-(2,4-Dichlorophenoxy)-1-(5,5-dimethyl-2-oxido-1,3,2-dioxaphosphinan-2-yl)vinyl 2-(2,4-Dichlorophenoxy)acetate

摘要

A new crystal of(E)-2-(2,4-dichlorophenoxy)-1-(5,5-dimethyl-2-oxido-1,3,2-dioxaphosphinan-2-yl)vinyl 2-(2,4-dichlorophenoxy)acetate has been determined by single-crystal X-ray diffraction. The compound crystallizes in triclinic, space group P1 with a = 7.9393(17), b = 11.974(3) ?, c = 13.532(3) ?, α = 90.937(4), β = 101.998(3), γ = 101.363(4)°, V = 1231.5(5) ?3, Dc = 1.500 Mg/m3, Z = 2, F(000) = 568 and μ = 0.585 mm^(-1). The molecular packing in the crystal is the result of C(10)–H(10)···O(5) hydrogen bond, as well as weak π-π stacking interactions. The herbicidal activity results indicated that the title compound 3 showed 80~100% inhibitory activities against all of the tested weeds at a dosage of 150 g×ai/ha.