Question

The major product formed in the following reaction is

• A.
• B. $CH_{3} - \underset{\underset{OCH_{3}}{|}}{CH} - CH_{2}CH_{3}$
• C. $CH_{3} - \overset{\overset{CH_{3}}{|}}{C} = CH_{2}$
• D.

Answer 1

Ans.

Sol. (i) (3): Presence of electron withdrawing group $( - NO_{2})$ increases the reactivity towards nucleophilic substitution and the effect at o-position is greater than at m-position.

(ii) (4): presence of electron donating group $( - CH_{3})$ decreases the reactivity towards nucleophilic substitution and the effect at o-position is greater than at m- position.

(iii) (4): More the number of electron withdrawing groups, more will be the reactivity.

(iv) (3); more the number of electron donating groups, lesser will be the reactivity.