MHT CET 2025 Chemistry question

Which of the following compounds is formed as major product in the following reaction.

2-methylbut-2-ene Product

(A)3-Bromo-2-methylbutane
(B)2-Bromo-2-methylbutane
(C)2-Bromo-3-methylbutaneCorrect
(D)2-Brombutane

Answer: (C)

Solution

In the presence of peroxide, HBr adds to an alkene by a free-radical mechanism (peroxide effect/Kharasch effect), giving the anti-Markovnikov product. For the radical adds to the less substituted double-bond carbon (C3) to give the more stable tertiary radical

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Question ID VK-101799