Adding Alkylgroup Alternative (AAA) - Lecture Notes | York University - Edubirdie

University:
York University
Course:
CHEM 2021 | Introductory Organic Chemistry II
Academic year:

2023
Views:

101

Pages:

2
Author:

Niklas

Diagram: Top Left: A reaction scheme showing the addition of an alkyl group to a benzene ring using an electrophilic aromatic substitution mechanism. Top Right: The structure of the alkyl group being added. Middle Left: A reaction scheme showing the attempted addition of an alkene to a benzene ring, which is not possible. Middle Right: A reaction scheme showing the attempted addition of a chlorine atom to a benzene ring, which is also not possible. Bottom: A reaction scheme showing the formation of a carbocation intermediate, which can then react with a nucleophile to add an alkyl group to the benzene ring. Mechanism: Reactants: Ph-H (benzene) AlCl3 R-COCl (acyl chloride) Intermediate: Ph-Cl-AlCl3 (sigma complex) Product: Ph-CO-R (acyl benzene) Additional Notes: "Acylium (Major contrib)" "more common on Benzylic C (Clemensen [H])" "CH2 - Methylene group"

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