areniumioneihin
Arenium ion, also called a sigma complex or Wheland intermediate, is a short‑lived cationic species that arises in electrophilic aromatic substitution (EAS) reactions. It forms when an electrophile (E+) adds to an aromatic ring, temporarily destroying aromaticity until a subsequent step restores it.
In the arenium ion, the positive charge is delocalized over several ring carbons through resonance, typically
Formation and fate: The reaction proceeds by E+ attacking the π system to give the arenium ion. A
Substituent effects and directing: Substituents on the ring influence the stability of the arenium ion and
Stability and isolation: In ordinary conditions, arenium ions are fleeting and not isolated. In very strong