Redox-neutral tetrafluoroethylation of aryl alkynes with 1,1,2,2-tetrafluoroethane sulfonic acid leading to α-tetrafluoroethylated acetophenones is described in the Full Paper by Takuji Kawamoto and co-workers on page 9529 ff. The reaction proceeds via formation vinyl tetrafluoroethanesulfonates followed a radical tetrafluoroethylation.