Phenol is more reactive than benzene towards electrophilic substitution. This characteristic is due to which of the following?
Correct answer: C. Strong mesomeric effect
- A. Hydrogen bonding
- B. Inductive effect
- C. Strong mesomeric effect
- D. Weak mesomeric effect
Explanation
The presence of the hydroxyl group in phenol allows for extensive resonance delocalization of electrons in the benzene ring, resulting in a strong mesomeric effect. This mesomeric effect stabilizes the positive charge on the intermediate during electrophilic substitution, making phenol more reactive. Hence, option C is correct.
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
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535 free Alcohols and Phenols MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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