Fig. 6: Two plausible mechanisms.
From: Organomediated electrochemical fluorosulfonylation of aryl triflates via selective C–O bond cleavage

Nucleophilic substitution of 1-(arylsulfonyl)−1,4-diazabicyclo[2.2.2]octan-1-ium IV or sulfonyl cation VI with F−.