Benzene + (CH_3)_2CH–CH_2Cl AlCl _3 (anhyd.) X. Identify X.

JEE Main Chemistry question

Benzene + (CH)CH–CHCl . Identify .

(A)Isopropylbenzene (cumene)
(B)*tert*-ButylbenzeneCorrect
(C)*sec*-Butylbenzene
(D)2-Methylbutan-2-ylbenzene

Answer: (B)

Solution

Isobutyl chloride generates a primary carbocation under Friedel–Crafts conditions, which rapidly rearranges via a 1,2-hydride shift to the much more stable tertiary

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Question ID VK-142458