REACTIONS OF PENTAFLUOROPHENYLXENON(II) HEXAFLUOROARSENATE [C6F5XE]+[ASF6]- WITH AROMATIC-COMPOUNDS

Pentafluorophenylxenon(II) hexafluoroarsenate [C6F5Xe]+[AsF6]- reacts (MeCN, 20-degrees-C) with aromatic compounds C6H5X (X = CH3, F, CF3, NO2 and CN), yielding isomeric mixtures of polyfluorinated biphenyls XC6H4C6F5. When X = 1, iodopentafluorobenzene is formed in addition, whereas trimethylsilylbenzene (X = SiMe3) is only converted to C6H5C6F5 and C6F5H. These results are compared with the data for the radical pentafluorophenylation and fluorination reactions of the corresponding aromatic compounds with XeF2. Polyfluoroaromatic compounds C6F6, C6F5H, C6F5I, C6F5CN and C6F5SiMe3 do not react with [C6F5Xe]+[AsF6]- under the same conditions.