Fluorosulfates of hexafluoroisobutylene and its higher homologs and their derivatives

3 22222Hexafluoroisobutylene and its higher homologs are easily reacted with SOto give fluorosulfates of the formula CH═C(R)CFOSOF, wherein R is a linear branched or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen. These compounds react under mild conditions with many nucleophiles to give CH═C(R)CFX, where X is derived from the nucleophile. This reaction provides a route to many substituted hexafluoroisobutylenes, which copolymerize easily with other fluoro- and hydrocarbon monomers such as vinylidene fluoride and ethylene.