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Question
The correct increasing order of the reactivity of halides for SN1 reaction is:
The correct increasing order of the reactivity of halides for SN1 reaction is:
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Solution
The correct option is A CH3−CH2−X<(CH3)2CH−X<CH2=CH−CH2−X<Ph−CH2−X
Reactivity of alkyl halides for SN1 reaction is directly proportional to the stability of carbocation.
Carbocation formed are:
Benzylic carbocation is the most stable because positive charge can be delocalized over benzene ring. Allylic carbocation is more stable than 2∘ carbocation because it can show equvalent resonating structures.
2∘ carbocation is more stable than 1∘ carbocation.
The correct order is :
CH3−CH2−X<(CH3)2CH−X<CH2=CH−CH2−X<Ph−CH2−X
Reactivity of alkyl halides for SN1 reaction is directly proportional to the stability of carbocation.
Carbocation formed are:
Benzylic carbocation is the most stable because positive charge can be delocalized over benzene ring. Allylic carbocation is more stable than 2∘ carbocation because it can show equvalent resonating structures.2∘ carbocation is more stable than 1∘ carbocation.
The correct order is :
CH3−CH2−X<(CH3)2CH−X<CH2=CH−CH2−X<Ph−CH2−X
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