Q. Addition of $HBr$ to propylene in presence of benzoyl peroxide, follows

A) Markownioff’s rule
B) Baeyer’s rule
C) Carbanion mechanism
D) $anti$-Markownioff’s rule
Explanation

(d)
(i)Markownikoff’s rule is applicable to addition of unsymmetrical alkene to unsymmetrical reagent.
(ii)$Anti$-Markwonikoff’s rule is applied to addition of $HBr$ to unsymmetrical alkene in presence of peroxide. Free radical is the reaction intermediate during this reaction. According to this rule negative part of the reagent adds to carbon atom having more number of hydrogen atoms.
$CH_{3} - CH = CH_{2}\underset{peroxide}{\overset{\ \ \ \ \ \ \ \ HBr\ \ \ \ \ \ }{\rightarrow}}$
$CH_{3} - CH_{2} - CH_{2} - Br$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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