Question

Consider the following reaction.
$H_3C - \underset{\underset{D}{|}}{CH} - \underset{\underset{CH_3}{|}}{CH} - CH_3 Br ^• \to X +HBr$
Identify the structure of the major product $X$.

• A. $H_3C - \underset{\underset{D}{|}}{CH} - \underset{\underset{CH_3}{|}}{CH} - \overset{•}{C}H_2 $
• B. $H_3C - \underset{\underset{D}{|}}{CH} - \underset{\underset{CH_3}{|}}{\overset{•}{C}} - CH_3 $
• C. $H_3C - \underset{\underset{D}{|}}{\overset{•}{C}} - \underset{\underset{CH_3}{|}}{CH} - CH-3$
• D. $H_3C - \overset{•}{CH} - \underset{\underset{CH_3}{|}}{CH} - CH_3$

Answer 1

Answer: (B)

$CH_3 - \underset{\underset{D}{|}}{CH} - \underset{\underset{CH_3}{|}}{\overset{•}{C}} - CH_3 $ is the tertiary free radical

which is the most stable amongst the given options.