Question
In S _ N 2 substitution reaction of the type R- Br + Cl ^ - [ BMF ] R- Cl + Br ^ - Which one of the following has highest relative rate?
BITSAT
Chemistry
Haloalkanes and Haloarenes
2024
BITSAT 2024 (Memory Based Paper 3)
BITSAT Chemistry Question (2024) — Solution
Options
- A.
- B.
- C. CH _3 CH _2 Br
- D. CH _3 CH _2 CH _2 Br
Answer
C. CH _3 CH _2 Br
Step-by-step solution
The rate of S_n 2 reaction is the maximum with 1^ allyl halide having least steric hindrance. Out of CH _3 CH _2 Br and CH _3 CH _2 CH _2 Br , CH _3 CH _2 Br has the least steric hindrance and hence has the highest relative rate.
Related: Chemistry — Haloalkanes and Haloarenes · All PYQ Banks