Question

benzly cation is more stable then allyl cation-give reason? ​

Answer 1

Answer:

Benzyl cation has more resonance forms, and a greater distribution of the cation over more atoms. These are models for rationalizing the data. The data is that benzyl cation [PhCH2]+ is indeed more stable than allyl cation [CH2CHCH2]+ when one measures the gas phase hydride ion affinities in kcal/mol.

Explanation:

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Answer 2

Allyl carbocation is more stable due to the presence of resonance.

H2C = CH - CH2 - CH = CH2

Positive charge is stabilised by double bond.

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