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When 3-phenylpropene reacts with HBr in ...

When 3-phenylpropene reacts with HBr in the presence of peroxide, the major product formed is

A

2-bromo 1-phenylpropane

B

1, 2-dibromo 3-phenylpropane

C

3-(o-bromophenyl) propene

D

1-bromo 3-phenylpropane

Text Solution

Verified by Experts

The correct Answer is:
D
In the presence of peroxides, the additon of HBr to unsymmetrical alkenes takes place contrary to Markownikoff.s rule. This is known as peroxide effect or Kharasch effect.
`underset("3-phenylpropene")(C_(6)H_(5) - CH_(2)-CH = CH_(2) + HBr) underset("Anti-Mark.addn.")overset("Peroxide")(rarr) underset("1-bromo-3-phenylpropene")(C_(6)H_(5)-CH_(2) - CH_(2) - CH_(2)Br)`
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