The “Non‐nucleophilic” Anion [Tf2N]‐ Competes with the Nucleophilic Br‐: An Unexpected Trapping in the Dediazoniation Reaction in Ionic Liquids.

Imidazolium ionic liquids containing [Tf2N]− anion are not as innocent as they are often considered; [Tf2N]− is more reactive than Br− in heterolytic dediazoniation reactions.