| abstract |
A compound of formula I Ar-C(R)(H)-CF=CF-C(R1)(H)-Ar1 or the optical isomers or the (E) and (Z) isomers thereof is claimed wherein: Ar is optionally substituted phenyl, 1- or 2-naphthyl or 5 or 6-membered heteroaromatic ring; R is H, alkyl, haloalkyl, cycloalkyl or halocycloalkyl; R1 is H, F, Cl, Br, CN or OR2; R2 is H or alkyl; Ar1 is optionally substituted phenoxyphenyl, phenyl, biphenyl, phenoxypyridyl, benzylpyridyl, benzylphenyl, benzoylphenyl, 1- or 2-naphthyl or 5 or 6-membered heteroaromatic ring. A composition containing a compound of formula I useful in the control of insects or acarid pests is claimed. |