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

Show Answer

Solution:

  1. (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.

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