2, 5-Difluorostyrene and 2-chloro-5-fluorostyrene have been prepared by conventional methods. The structure of the intermediate 2-chloro-5-fluoroacetophenone, prepared from pchlorofluorobenzene and acetyl chloride, has been proven unambiguously. Polymers of the new styrene derivatives and co-polymers with styrene and methyl methacrylate has been prepared. In correction of a previous publication, it has been shown that the preparation of ...