| abstract |
PROBLEM TO BE SOLVED: To provide a fluorine-containing nitrile compound having a sulfonic acid group and a cyano group and a method for producing the same. SOLUTION: FSO 2 CF 2 [CF 2 OCF (C F 3 )] n CN (where n = 0, 1, 2 or 3) is hydrolyzed in the presence of a tertiary amine, and is contacted with an acid-type ion exchange resin to obtain HOSO 2 CF 2 [CF 2 O CF (CF 3 )] n CN (where n = 0, 1, 2, or 3). |