| abstract |
New substituted α, α-diphenylethylene derivatives of the formula I. wherein R₁ and R₄ independently of one another hydrogen, hydroxy, C₁-C₅-alkyl, C₁-C₈ alkoxy, C₁-C₃-alkoxy substituted with 1 to 7 halogen atoms, alkoxyalkoxy with a total of 2 to 6 C-atoms, C₃-C₅-alkenyloxy or C₃- C₅ alkynyloxy; R₂ and R₃ independently of one another are hydrogen, halogen, C₁-C₃-alkyl, C₁-C₅-alkoxy or nitro; or R₁ and R₂ together represent a radical -O-CH₂-O- or -O-CH₂-CH₂-O-; R₅ and R₆ are independently hydrogen, halogen or methyl; R₇ and R₈ independently of one another hydrogen, methyl or ethyl; and X and Y independently of one another -O- or -S- mean; Processes and intermediates for the preparation of these compounds as well as compositions containing them for controlling insects and representatives of the order Akarina, especially ectoparasites which damage plant insects and animals. |