Stoichiometric C–H bond pentafluoroethylation by 1^a.

Entry	Substrate	Conditions	Yield [%]
1		—	0
2		K2S2O8 (1 equiv.)	75
3		K2S2O8 (1 equiv.)	80
4		K2S2O8 (1 equiv.)	38
5		K2S2O8 (1 equiv.)	50
6		K2S2O8 (1 equiv.)	37

^aReactions were performed for 24 hours using 1 equiv. of the substrate, and 1 equiv. of 1 in DMSO at RT under N₂ unless indicated otherwise. The yields were determined by ¹⁹F NMR based on integration against α,α,α-trifluorotoluene as an internal standard.