Hydrogen fluoride ionization potential

Recently it was discovered (/) that AgF+ salts are powerful oxidizers capable of oxidizing xenon at ordinary temperatures, per-fluorobutene to perfluorobutane, and per-fluorobenzene to salts of, both of the latter at 208 K, in anhydrous hydrogen fluoride solution (2). These oxidations by AgF+ imply electron transfer to the cationic Ag(II) as the first step in the reaction. This is consistent with the high second ionization potential of Ag (21.49 eV) which is the highest... 

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