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Explain how does the OH group attached to a carbon of benzene
Chemistry Part-II
Chemistry Part-II

Class 12

NCERT

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NCERT
Subject:
Chemistry
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Explain how does the OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

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Updated on: Aug 21, 2023

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Chemistry Part-II (NCERT)

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Text SolutionText solutionverified iconVerified

Phenol may be regarded as a resonance hybrid of structures I-V, shown below.

As a result of +R effect of the -OH group, the electron density in the benzene ring increases thereby facilitating the attack of an electrophile. In other words, presence of -OH group, activates the benzene ring towards electrophilic substitution reactions. Further, since the electron density is relatively higher at the two o-and one p-position, therefore electrophilic substitution occurs mainly at o-and p-positions.
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Question Text
Explain how does the OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?
Updated OnAug 21, 2023
TopicAlcohols, Phenols and Ethers
SubjectChemistry
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes105
Avg. Video Duration13 min