Explain why Lewis acid is not required in bromination of phenol.

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Solution

During the bromination of any non polar substance like benzene, lewis acid is used to polarise the attacking electrophile $B r_{2}$ .
But in case of highly polar phenol molecule, the oxygen atom present in the phenol molecule itself polarizes the incoming electrophile $B r_{2}$ to form ions. SO in this case no additional lewis acid is requirred.

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Similar questions

(i) Name the starting material used in the industrial preparation of phenol.

(ii) Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium.

(iii) Explain why Lewis acid is not required in bromination of phenol?

Assertion (A) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.
Reason (R) Lewis acid polarises the bromine molecule.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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