branched chain, or cyclic alkylene or haloalkylene radical, and wherein E is Cl, Br, or I. Preparation of fluorine-containing ethers in two steps, by first reacting an appropriate halogenated ketone or halogenated acyl fluoride with an ionizable fluoride salt to form a fiuorinated organic salt, and then reacting the fiuorinated organic salt with an olefin and a halogen other than fluorine to form