In which  of the following pairs A is more stable than B?

  • Option 1)

      

  • Option 2)

        

  • Option 3)

       

  • Option 4)

      

 

Answers (3)

As we learnt in 

Stability of alkyl free radical due to resonance -

More the no of resonating structure more is the stability.

- wherein

 

 

Stability due to resonance -

More the no of resonating structure more is the stability.

- wherein

 

 

Ph_{3}C^{\bullet } is resonance stabilised while (CH_{3})_{3}C^{\bullet} is stable due to hyperconjugation. Since resonance is dominating over hyperconjugation Ph_{3}C^{\bullet } is more stable than (CH_{3})_{3}C^{\bullet}.

 

 

 


Option 1)

  

This is incorrect option

Option 2)

    

This is incorrect option

Option 3)

   

This is incorrect option

Option 4)

  

This is correct option

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