Q 11 :    

Consider the following compounds:                              

[IMAGE 81]

Hyperconjugation occurs in                                 [2015]

  • III only

     

  • I and III

     

  • I only

     

  • II only

     

(1)

Hyperconjugation can occur only in compound III as it has α-hydrogen atom.



Q 12 :    

In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ion?           [2015]

  • [IMAGE 82]

     

  • [IMAGE 83]

     

  • [IMAGE 84]

     

  • [IMAGE 85]

     

(4)

[IMAGE 86]    is most stable due to hyperconjugation.