Question

Predict major addition product when the following addition reaction carried out in presence of peroxide:

$C_6{H}_5-CH=CH-C{H}_3+CC{l}_4\to$

• A. $C_6{H}_5-CH\left(CC{l}_3\right)-CH\left(Cl\right)-C{H}_3$
• B. $C_6{H}_5-CH\left(Cl\right)-CH\left(CC{l}_3\right)-C{H}_3$
• C. $C_6{H}_5-CH\left(CC{l}_3\right)-C{H}_2-C{H}_{2}Cl$
• D. $C_6{H}_5-C{H}_2-CH\left(CC{l}_3\right)-C{H}_{2}Cl$

Answer 1

The correct option is A $C_6{H}_5-CH\left(CC{l}_3\right)-CH\left(Cl\right)-C{H}_3$

$CC{l}_4\to CC{l}_3^{-}+C{l}^{+}$

$C_6{H}_5-CH=CH-C{H}_3+CC{l}_4\to C_6{H}_5-CH\left(CC{l}_3\right)-CH\left(Cl\right)-C{H}_3$

A molecule of carbon tetrachloride is added to alkene to form tetrachloro derivative. The negative part of the reagent ($CC{l}_3^{-}$) goes to the more stabilized carbocation, gives the major product. There is no effect of peroxide in this case because it is applicable only when bromine is present.

Option A is the correct answer.