AIIMS2019Chemistry-Organic Chemistry

AIIMS 2019 Chemistry Carbocation Stability MCQ Question

Type: MCQ-conceptual-Medium-Class 11

Assertion : 1-chloro-1-methylcyclobutane Structure\langle\text{1-chloro-1-methylcyclobutane Structure}\rangle is less reactive than chlorocyclobutane Structure\langle\text{chlorocyclobutane Structure}\rangle towards nucleophilic substitution reactions (SN1\text{S}_\text{N}1).

Reason : Alkyl halides which can form less stable carbocation favour SN1\text{S}_\text{N}1 reaction.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Correct Answer

Option D

Detailed Explanation

The stability of carbocations is crucial in determining the reactivity of compounds in Sₙ1 reactions. In this case, 1-chloro-1-ethylcyclopentane forms a more stable tertiary carbocation compared to 1-chlorocyclopentane, which leads to increased reactivity in the Sₙ1 mechanism. Other options are not applicable as they do not provide relevant information or alternatives regarding the stability of carbocations and their influence on reaction mechanisms. Understanding the relationship between carbocation stability and reactivity is essential for predicting the outcomes of nucleophilic substitution reactions.

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