Decreasing order towards S N 1 reaction for the following compounds is:

Decreasing order towards SN1 reaction for the following compounds is:

 

  1. a > c > d > b
  2. a > b > c > d
  3. b > d > c > a
  4. d > b > c > a

Solution

The relative reactivity of alkyl halides in the SN1 reaction depends on the stability of carbocation. Electron-withdrawing groups decrease the stability and electron-releasing groups increase the stability of carbocations. -NO2 group is an electron-withdrawing group by -M effect. -OMe is electron-releasing groups by +M effect. Hence, the overall order is 

∴ Reactivity order (b) > (d) > (c) > (a)

Asked in: JEE Main 2023 (30 Jan Shift 2)

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