BRAINCAKEMechanism of Friedel-Crafts Acylation
Friedel-Crafts acylation follows the electrophilic substitution mechanism. The electrophile is formed with the help of the aluminium chloride catalyst.
Forming the electrophile. AlCl3 accepts a lone pair from the chlorine of the acyl chloride and removes it as AlCl4−. This leaves RCO+, an acylium ion. For ethanoyl chloride:
CH3COCl + AlCl3 → CH3CO+ + AlCl4−
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More in Aromatic Chemistry
- The Delocalised Model of Benzene
- Evidence for Delocalisation - Enthalpy of Hydrogenation
- Naming Aromatic Compounds
- Electrophilic Substitution
- Nitration of Benzene
- Mechanism of Nitration
- Uses of Nitration
- Friedel-Crafts Acylation
All 11 lessons in Aromatic Chemistry · All AQA A-level Chemistry topics