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Sir in the question in the attachment in the D part answer is given as benzylbenzene and in E part it is given as benzene . can you justify the answers ?

Sir in the question in the attachment in the D part answer is given as benzylbenzene and in E part it is given as benzene . can you justify the answers ?

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3 Answers

Vikas TU
14149 Points
7 years ago
Resonance energy is directly proportional the stability of compunds.
hence in last option Benzene is more stable as due to aromaticity  that is:
4n + 2 elctrons govening.
Aditya Dev
28 Points
7 years ago
Sir what about the D part of the question?......................................................................................
Ankit Kumar Sharma
48 Points
7 years ago
In case of D part, i.e- benzyl benzene, due the the individual electronic delocalisation in benzene rings, the molecule gets stability.But in naphthalene, an electron pair is common to both. And so stability in one ring destabilises the another, and thats why the overall stability of the system is less than benzylbenzene. And in part E, benzene ring has 6 electron that satisfies the condition of aromaticity of being 4n+2 electrons, and also having ring current. That special stability is not there in case of open system.

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