Thermodynamic Stabilities of Phenonium Ions in the Gas Phase
Gas phase stabilities of substituted phenonium (ethylenearenium) ions have been determined based on bromide transfer equilibria. The phenonium ion has been found to be stable even more than t-butyl cation, and the substituent effect on its stability has been analyzed based on the LArSR Eq., giving a ρ value of −17.5 and an r of 0.60.