X-RAY STRUCTURE OF THE PYRETHROID INSECTICIDE (1R-(1-ALPHA(S-STAR),2-ALPHA))-2-(2,2-DICHLOROVINYL)-3,3-DIMETHYLCYCLOPROPANECARBOXYLIC ACID CYANO(3-PHENOXYPHENYL)METHYL ESTER (RU-24501)

alpha-Cyano-3-phenoxybenzyl {1 R-[1-alpha(S*),-2-alpha]}-2-(2,2-dichlorovinyl)-3,3-dimethylcyclopropanecarboxylate. The crystal structure of one pyrethroid insecticide patented by Roussel UCLAF has been determined at 293 K by X-ray diffraction. The crystal is orthorhombic, P2(1)2(1)2(1), C22H19Cl2NO3 (RU 24501), M(r) = 416.30, a = 9.296 (3), b = 35.853 (9), c = 6.212 (3) angstrom, Z = 4, V = 2070.4 angstrom3, D(x) = 1.34 Mg m-3, Mo K-alpha, lambda = 0.7107 angstrom, mu = 0.288 mm-1, F(000) = 864. The structure was refined from 1526 reflections with I > 3-sigma(I) or R = 0.059. All H atoms were found on a difference map. The conformation of the compound is compared with those of other known pyrethroid structures in the crystalline state.