- An
arenium ion in
organic chemistry is a
cyclohexadienyl cation that
appears as a
reactive intermediate in
electrophilic aromatic substitution. For historic...
- In the
arenium ion
mechanism one
reaction partner is
protonated to an
arenium ion
which then
attacks the
second reaction partner. The
arenium ion can...
- to the
stability of
arenium ions is the
energy gain
resulting from the
strong C-e bond (E = electrophile). The
smallest arenium ion is
protonated benzene...
- of an
acylium center. The
reaction is
completed by
deprotonation of the
arenium ion by AlCl4−,
regenerating the AlCl3 catalyst. However, in
contrast to...
- more
stable carbocation.
Cyclopropylcarbenium ions,
alkenyl cations, and
arenium cations have also been observed. As use of the
Magic acid
system became...
-
positively charged and
delocalized cyclohexadienyl cation, also
known as an
arenium ion,
Wheland intermediate, or
arene σ-complex (2b). Many
examples of this...
-
catalyst to
enhance the
electrophilicity of the halogen. The
formation of the
arenium ion
results in the
temporary loss of aromaticity,
which has a
higher activation...
- part of the ring structure. As such it is the
radical counterpart of the
arenium ion. The
parent compound is the
phenyl radical C 6H• 5. Aryl
radicals are...
- "Nuclear
Decay Techniques in Ion Chemistry". (1992) "Proton
shifts in
gaseous arenium ions and
their role in the gas-phase
aromatic substitution by free Me3C+...
- hydride-ion is
taken up,
followed by an
irreversible rearrangement to an
arenium ion
which is
stable in the
fluorosulfonic acid
medium (see: Figure 6, upper...
