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Question: Answered & Verified by Expert
Least reactive alkyl chloride in a $\mathrm{S}_{\mathrm{N}} 2$ reaction is
ChemistryHaloalkanes and HaloarenesAP EAMCETAP EAMCET 2023 (16 May Shift 2)
Options:
  • A 1-Chloro butane
  • B 1-Chloro 2-Methyl propane
  • C 2-Chloro 2-Methyl propane
  • D 2-Chloro butane
Solution:
1280 Upvotes Verified Answer
The correct answer is: 2-Chloro 2-Methyl propane
An $\mathrm{S}_{\mathrm{N}} 2$ reaction involves a single-step concerted mechanism and the alkyl halide that is most substituted at the $\alpha$-position will be least reactive.
Thus, 2-chloro-2-methyl propane will be least reactive.

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