Hydrocarbons - Result Question 28
####30. Reaction of $HBr$ with propene in the presence of peroxide gives
[2004]
(a) isopropyl bromide
(b) 3-bromo propane
(c) allyl bromide
(d) n-propyl bromide
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Solution:
- (d) In presence of peroxide, $HBr$ adds on alkenes according to anti-markownikoff’s rule.
Kharasch observed that the addition of $HBr$ to unsymmetrical alkene in the presence of organic peroxides follows an opposite course to that suggested by Markownikoff. This is termed anti-Markownikoff or peroxide effect.
