JEE Main Chemistry question

Chemistry Alcohols, Phenols and Ethers JEE Main

The reaction of *iso*-propylbenzene with oxygen in the presence of a catalytic amount of HBr followed by treatment with an acid gives phenol. The reaction proceeds through the intermediate formation of

(A) (hydroperoxyl radical)
(B) (benzylic radical)
(C) (peroxy radical)
(D)All of theseCorrect

Answer: (D)

Solution

The autoxidation (cumene process) mechanism proceeds through a radical chain: HBr-derived or initiator-generated radicals abstract the benzylic hydrogen to form the stabilised benzylic radical, which reacts with to form the peroxy radical, which abstracts

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Question ID VK-148627