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Aromatic carboxylic acids do not und...

Aromatic carboxylic acids do not undergo Friedel crafts reaction. Explain.

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**Step-by-Step Solution:** 1. **Understanding Friedel-Crafts Reactions**: Friedel-Crafts reactions are electrophilic aromatic substitution reactions that involve the alkylation or acylation of aromatic compounds. They typically require a Lewis acid catalyst (like AlCl3 or FeCl3) to generate a carbocation or acylium ion that can react with the aromatic ring. 2. **Nature of Aromatic Carboxylic Acids**: Aromatic carboxylic acids, such as benzoic acid, contain a carboxyl (-COOH) group attached to the aromatic ring. This functional group is known to be a deactivating group in electrophilic aromatic substitution reactions. 3. **Deactivating Effect of the Carboxyl Group**: The carboxyl group withdraws electron density from the aromatic ring due to its electronegative oxygen atoms and resonance effects. This reduction in electron density makes the aromatic ring less reactive towards electrophiles, such as the carbocation generated in Friedel-Crafts reactions. ...
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Explore conceptually related problems

Account for the following : (a) Aromatic carboxylic acids do not undergo Friedel-Crafts reaction. (b) pK_(a) value of 4-nitrobenzoic acid is lower than that of benzoic acid .

Friedel Craft Reaction

Assertion (A): Aromatic carboxylic groups do not undergo Friedel- Crafts reaction. Reason (R): Carboxyl group is deactivating and the catalyst aluminium chloride gets bonded to the carboxyl group

Aniline does not undergo Friedel Crafts alkylation. Explain.

Assertion (A): Benzoic acid does not undergo Friedel-craft's reaction. Reaction (R): The carboxyl group is activating and undergo electrophilic substitution reaction.

Knowledge Check

  • Assertion (A) : Aromatic carboxylic acids do not undergo Friedel Crafts reaction. Reason (R) : AlCl_(3) is Lewis acid and gets bounded to carboxyl group.

    A
    Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
    B
    Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
    C
    Assertion (A) is correct, but Reason (R) is incorrect statement.
    D
    Assertion (A) is incorrect, but Reason (R) is correct statement

  • Assertion : Carboxylic acids do not undergo Friedel - Crafts reaction. Reason : Carboxyl group is meta-directing group.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Assertion (A): Aromatic carboxylic groups do not undergo Friedel- Crafts reaction. Reason (R): Carboxyl group is deactivating and the catalyst aluminium chloride gets bonded to the carboxyl group

    A
    Both A and Rare true and R is the correct explanation of A
    B
    Both A and R are true but R is NOT the correct explanation of A
    C
    A is true but R is false
    D
    A is false and R is true