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Question

The increasing order of the reactivity of the following halides for the SN1 reaction is :


A

I)<(III)<(II

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B

II)<(III)<(I

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C

III)<(II)<(I

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D

II)<(I)<(III

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Solution

The correct option is D

II)<(I)<(III


The correct options are (d)

The Explanation for the correct options:

(d)

  • Explanation: The halides' reactivity in ascending order for the SN1reaction isII)<(I)<(III.\
  • IIan primary alkyl halide Iis a secondary alkyl halide.
  • The reactivity of a primary alkyl halide towards SN1reaction is less than a secondary alkyl halide.
  • InIII, Due to resonance, the carbocation that is produced is stabilized. Hence, III is most reactive to the SN1reaction.

The correct option is (d): The halides' reactivity in ascending order for the SN1reaction isII)<(I)<(III.


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