The synthesis of salts and esters of perfluorinated dithio- and thiocarboxylic acids from carbon disulfide and carbonyl sulfide reacting with RFSiMe3/F−

Trimethyl(perfluoroalkyl)silanes react with carbonyl sulfide and carbon disulfide in the presence of fluoride ion to give salts and, after alkylation of the latter, esters of the corresponding perfluorinated thio- and dithiocarboxylic acids.