Fluorination of 2-chlorodiethyl ether by cobalt trifluoride at 110-150
degrees C afforded isomers of 2-chloro-pentafluoro-, -hexafluoro-, an
d -heptafluoro- diethyl ethers. Chlorine was lost in similar fluorinat
ions of 2-chloro-2,2-difluoroethyl ethyl ether, the only products isol
ated being a hepta- and a hexa-fluoro diethyl ether. Structures were e
stablished spectroscopically.