A) 2-bromo 1-phenylpropane
B) 1, 2-dibromo 3-phenylpropane
C) 3 - (o-bromophenyl) propene
D) 1-bromo 3-phenylpropane
E) 3 (p-bromophenyl) propene
Correct Answer: D
Solution :
In the presence of peroxides, the addition of \[HBr\]to unsymmetrical alkenes takes place contrary to Markownikoffs rule. This is known as peroxide effect or Kharasch effect. \[\underset{3-phenylpropene}{\mathop{{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-CH=C{{H}_{2}}}}\,+HBr\xrightarrow[Anti-Mark.addn.]{Peroxide}\] \[\underset{1-bromo-3-phenylpropene}{\mathop{{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}}}\,Br\]
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