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Carboxylic acids contain carbonyl group ...

Carboxylic acids contain carbonyl group but do not show the nucleophilic addition reactions like aldehydes or ketones. Why?

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No doubt, the carboxylic acids contain a carbonyl group but it is a part of carboxyl group and is involved in resonance.

This means that the carbon atom of the carbonyl group is not in a position to accommodate the attacking nucleophile. Therefore, carboxylic acids donot participate in the nuclephilic addition reactions whereas both aldehydes and ketones do participate. For more details, consult section 16.
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Knowledge Check

  • Assertion : Carboxylic acids contain a carbonyl group but donot give the characteristic reactions of the group. Reason : The electrophilicity of the carbon atom is more in carboxylic acids than in aldehydes and ketones.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion and reason are both incorrect.

  • Assertion: Carboxylic acids contain a carbonyl group but do not give characteristic reactions of the carbonyl group. Reason: Due to resonance, the electrophilic nature of the carboxyl carbon is greatly reduced as compared to the carbonyl carbon in aldehydes and ketones.

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

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    Ketones give nucleophilic addition reactions more readily than aldehydes.

    Carboxylic acids do not give reactions of aldehydes and ketones, why?

    Carboxylic acids do not give reactions of aldehydes and ketones why ?

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