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

Question

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

Tardigrade Admin · Accepted Answer

In the presence of peroxides, the addition of

H B r

to unsymmetrical alkenes takes place contrary to Markownikoffs rule. This is known as peroxide effect or Kharasch effect.

3 - p h e n y lp ro p e n e C_{6} H_{5} - C H_{2} - C H = C H_{2} + H B r P ero x i d e A n t i - M a r k . a dd n .

1 - b ro m o - 3 - p h e n y lp ro p e n e C_{6} H_{5} - C H_{2} - C H_{2} - C H_{2} B r

Q. When $3$ -phenylpropene reacts with $H B r$ in the presence of peroxide, the major product formed is

$2$ -bromo $1$ -phenylpropane

$1, 2$ -dibromo $3$ -phenylpropane

$3$ -( $o$ -bromophenyl) propene

$1$ -bromo- $3$ -phenylpropane

$3$ -(p-bromophenyl) propene

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

2-bromo 1-phenylpropane

1,2-dibromo 3-phenylpropane

3-(o-bromophenyl) propene

1-bromo-3-phenylpropane