JEE Main 2019ChemistryHaloalkanes And HaloarenesHaloarenesmediumMCQ
JEE Main 2019 — Haloalkanes And Haloarenes Question with Solution
From: JEE Main 2019 (Online) 10th April Morning Slot
Question
Increasing rate of SN1 reaction in the following compounds is :
This question includes a diagram. The text above accompanies the figure.
Choose an option
▸Show full solutionCorrect option: D
Correct answer
D(B) < (A) < (C) < (D)
Step-by-step explanation
The rate of SN1 is decided by the stability of
carbocation which is formed when leaving group I(Iodine) leave from the compound.
Carbocation (D) is most stable due to +R effect
of CH3O group.
Carbocation (C) is stabilised by +I and +H
effect of CH3 group.
Carbocation (B) is least stable due to
–I effect of MeO group.
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