Class 11 Chemistry Notes GOC – Benzyl Free Radical and Free Radical Problems

(4 Resonating Structure)

 (7 Resonating structure)

(Tribenzylic free Radical)

(7 Resonating structure)

Ex.1 Compare the stability of the following free Radical.

1. 
2. 
3. 

Sol. (a) CH3-C0H2 will be most stable due to hyper conjugation
Between 

⇒More s-character
⇒More electronegative
⇒E-density maximum
⇒More repulsion
⇒Less stable

Ans. a > b > c (More repulsion, less stability)

Ex.2 Compare the stability of the following free Radicals

(Therefore this resonating structure is not possible)
Ans. b > a > c

Ex.3

(a) 
(b) 
(c) 
(d) 
Compare the bond energy of the above compounds.

Sol. After forming free radical from the compound