1.1.2.2-Tetrafluoro-2-(polyfluoroalkoxy)ethanesulfonic acids, 1.1.2.2- tetrafluoro-2-(perfluoroalkoxy) ethanesulfonic acids, and 2, 2’-oxybis (1, 1, 2, 2-tetrafluoroethanesulfonic acid)

Abstract

Basic hydrolysis of 1, 1, 2, 2-tetrafluoro-2-(polyfluoroalkoxy)ethanesulfonyl fluorides leads to new polyfluoroalkanesulfonic acids, RfOCF2CF2SO3H (Rf = CF3CH2, CF3CF2CH2, CF3CF2CF2CH2), after passing the aqueous solution through a strongly acidic resin. 1, 1, 2, 2-Tetrafluoro-2-(perfluoroalkoxy)ethanesulfonic acids, RfOCF2CF2SO3H (Rf = CF3CF2, CF3CF2CF2CF2) resulted when I(CF2)nO(CF2)2SO2F was fluorinated, subjected to basic hydrolysis, and distilled from H2S04. Synthesis of the disulfonic acid HSO3CF2CF2OCF2CF2SO3H was also accomplished. © 1988, American Chemical Society. All rights reserved.