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Explain why phenols do not undergo subst...

Explain why phenols do not undergo substitution of the -OH group like alcohols?

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**Step-by-Step Solution:** 1. **Understanding the Structure of Phenols and Alcohols:** - Phenols are compounds where the hydroxyl (-OH) group is directly attached to an aromatic ring, whereas alcohols have the -OH group attached to a saturated carbon atom. - The presence of the aromatic ring in phenols influences the behavior of the -OH group. 2. **Nature of the -OH Group in Alcohols:** - In alcohols, the -OH group is a good leaving group under certain conditions, allowing for substitution reactions. For example, when alcohols react with hydrogen halides (HX), the -OH group can be replaced by a halide ion (X). ...
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Explain the following : (i) o - nitrophenol is more acidic than meta - nitrophenol. (ii) Phenol gets coloured on long standing. (iii) o - nitrophenol is steam volatile while, p -nitro - phenol is not. (iv) Phenol does not undergo substitutions at the carbon oxygen bond.

Phenol does not undergo nucleophilic substitution reaction easily due to:

Knowledge Check

  • Phenol undergoes aromatic substitution to give

    A
    o-disubstituted product
    B
    p-disubstituted products
    C
    o and p-disubstitute products
    D
    m-disubstitute product
  • The OH group of phenol

    A
    activates ring powerfully and direacts ortho, para in nucleophilic aromatic substitution.
    B
    activates ring powerully and direacts ortho, para in electrophilic substitution
    C
    deactivates powerfully and directs ortho, para in electrophile aromatic substitution
    D
    deactivates powerfully and directs meta in electrophilic aromatic substitution.
  • Which of the following statement(s) is/are correct? I. OH group in phenols is more stronger helds as compared to OH group in alcohols. II. OH group in phenols is less stronger helds as compared to OH group in alcohols. III. OH group in phenols is equally stronger as compared to OH group in alcohols. Select the correct option.

    A
    I and II
    B
    Only I
    C
    II and III
    D
    Only III
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