JEE Main202330 Jan 2023Evening ShiftChemistryHaloalkanes and HaloarenesActual
Decreasing order towards S N 1 reaction for the following compounds is:
Options
- Aa > c > d > b
- Ba > b > c > d
- Cb > d > c > a
- Dd > b > c > a
Correct answer
C. b > d > c > a
Step-by-step solution
The relative reactivity of alkyl halides in the S N 1 reaction depends on the stability of carbocation. Electron-withdrawing groups decrease the stability and electron-releasing groups increase the stability of carbocations. - NO 2 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)