Q. The most stable free radical among the following is

 2744  210 Organic Chemistry – Some Basic Principles and Techniques Report Error

Solution:

(a) Free radical stabilized only by electron releasing effect of group.
(b) Free radical stabilized by resonance and electron releasing effect of group.
(c) Free radical stabilized only by resonance.
(d) Free radical most stable. Stabilization by 2 methyl groups because of their releasing effects.