3.3 Gas-Phase Smiles Rearrangement of ortho-nitro
diaryliodonium cations
In order to clearly explain the gas-phase O-atom transfer reaction
mechanism of
[Mes-I+-(o -NO2-C6H4)]
from salt 5 to the dominating fragment ion
[MesO]+, we further studied the tandem mass
spectra of some
[Ar1-I+-(o -NO2-C6H4)]
cations with different Ar1 from salts9 ~12 (shown in Scheme 1 ) and
these
[Ar1-I+-(o -NO2-C6H4)]
cations all exhibited the oxygen-atom transfer product ions
[Ar1O]+ by loss of neutral
[o -NO-Ar2I] (shown in Figure 3 ).