1.

Compare the bond energies of C – H bond (at a, b, c, d, e and f position)

Answer»

Solution :
`b gt e gt a gt f gt C = d ?`
Stability order of free Radical that might be formed after REMOVAL of H (Homolytically) from the given carbon.
`rArre lt b lt a lt f lt c = d`
(`C - H`BOND energies)
`*`In the above compound while comparing `2^(@)` BENZYLIC allylic stability at two given position

while drawing the resonating structure of the

(Here inspite of Resonace THREE`alpha (C - H)` bond are available for no bond Resonance.
`rArr ` Therefore extre stable than which have
only two `alpha (C - H)`bond for Hyper conjugation. Therefore `2^(@)` benzylic allylic corresponding to structure (a) is more stable than that of structure (b)


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