electrophilic substitution
Quick Summary
Electrophilic substitution is a fundamental chemical reaction where an atom or group in a molecule is replaced by an electrophile. An electrophile is a species that seeks electrons to form a bond.
In this reaction, typically occurring in aromatic systems, an electrophilic agent (E) replaces a substituent (Y), often a hydrogen atom, on the molecule. The reaction proceeds through a pi complex and a carbonium ion intermediate. Electron-donating substituents on the molecule facilitate the reaction, while electron-withdrawing groups hinder it. Steric effects can also influence the reaction's outcome, though electronic effects are generally more dominant. This type of reaction is crucial for understanding the behavior of aromatic compounds.12
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