Aromatic radical cations are well-known species in electrochemical and gas phase reactions that produce biaryls through a coupling reaction with aromatic compounds, and the existence of aromatic radical cations in the liquid phase has recently been proposed on the basis of spectroscopic studies. 1 Metal salts such as CuCl2, 2 Tl (OCOCF3) 3, 3 and Mn [CH (COCH3) 2] 3 4 and Lewis acids such as AlCl3, 5 FeCl3, 6 and SbCl3 7 are reported to be ...
