Abstract For the first time, fluorinated oxathialones, polyfluoroalkylchlorothioformates, chlorocarbonylpolyfluoroalkylsulfenate esters, a chlorocarbonylhexafluoroisopropylidenimino sulfenate, and a 5-tri-fluoromethyl-2-oxo-1, 3, 4- oxathiazole were synthesized by reacting chlorocarbonylsulfenyl chloride with R f C (O) CH 2 C (O) R′(R f= CF 3; R'= CF 3, OC 2 H 5), R f O-Li+(R f= CF 3 CH 2,(CF 3) 2 C= N-Li+ ...