The major product of the following chemical reaction is: CH3 CH–CH=CH +HBr 2 CH3 (C H CO) O 6 5 2 2 ? (A) CH3 CH–CH –CH –Br 2 2 CH3 (B) CH3 CH–CH –CH –O–COC H 2 2 6 5 CH3 (C) CH3 CH–CH–CH3 CH3 Br (D)

Question

The major product of the following chemical reaction is: CH3 CH–CH=CH +HBr 2 CH3 (C H CO) O 6 5 2 2 ?

(A) CH3 CH–CH –CH –Br 2 2 CH3
(B) CH3 CH–CH –CH –O–COC H 2 2 6 5 CH3
(C) CH3 CH–CH–CH3 CH3 Br
(D) CH3 CBr–CH –CH 2 3 CH3

Prashant Kotian · Accepted Answer

Correct answer: A. CH3 CH3 CH–CH=CH2 +HBr (C H CO) O 6 5 2 2 CH3 CH3 CH–CH –CH –Br 2 2 (Benzoyl peroxide) In the presence of peroxide, addition of HBr to unsymmetrical alkenes take place by anti-Markovnikov's rule/Peroxide effect/Kharash effect.

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