Class 11 NEET Chemistry Hydrocarbons Questions

The formation of n -propyl bromide in presence of peroxide can be explained as follow:
Step 1 : Peroxide undergoes fission to give free radicals.
R−O−O−R⟶2R−

●

O

Step 2 : HBr combines with free radical to form bromine free radical.
R−

●

O

+HBr⟶R−OH+

●

B

r
Step 3 :

●

B

r attacks the double bond of the alkene to form a more stable free radical.
Step 4: More stable free radical attacks on HBr.
Step 5 :

●

B

r+Br⟶

●

B

r2