Diarylborenium Cations: Synthesis, Structure, and Electrochemistry

Mes 2 BF and Ar N 2 BF (Ar N = 4-(Me 2 N)-2,6-Me 2 -C 6 H 2 ) react with trimethylsilyltriflate and p -dimethylaminopyridine in chlorobenzene to afford the corresponding borenium salts [Mes 2 B-DMAP] + OTf − ([ 1 ] + OTf − ) and [Ar N 2 B-DMAP] + OTf − ([ 2 ] + OTf − ), which have been fully characterized.