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explain why prophyl carbonium ion is less satble than allyl carbonium ion?

explain why prophyl carbonium ion is less satble than allyl carbonium ion?
 

Grade:12th pass

3 Answers

Vikas TU
14149 Points
7 years ago
Due to the number of Hyperconjugations involed.
The ally group organic compund must have more Number of Hyperconjugations than the propyl Carbonum ion.
DILIP
116 Points
7 years ago
Allylic carbocation are considered to be more stable than substituted alkyl carbocations because delocalisation is associated with the resonance interaction between the positively charged carbon and the adjacent pie (π) bond.
 
The allyl cation can be represented as a hybrid of two equivalent contributing structures. 
 
A distributed charge in a molecule is more stabilizing than a more localized charge and it is also experimentally determined that the double bond of an adjacent vinyl group provides approximately as much stabilization as two alkyl groups and hence, the allyl cation  are comparably more stable.
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Khimraj
3007 Points
7 years ago
In allyl carbonium ion there is resonance. So it stabilise it and it is more stable than prophylactic carbonium ion. Hope it clears.

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