JEE Main 20249 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2024
- Date
- 9 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Haloalkanes and Haloarenes
JEE Main 2024 · 9 April · Morning Shift · Chemistry · Haloalkanes and Haloarenes
Given below are two statements : one is labelled as Assertion (A)...
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): (\mathrm{S}_{\mathrm{N}} 2) reaction of (\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}) occurs more readily than the (\mathrm{S}_{\mathrm{N}} 2) reaction of (\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}).
Reason (R) : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.
In the light of the above statements, choose the most appropriate answer from the options given below :
Options
- A(A) is correct but (R) is not correct
- B(A) is not correct but (R) is correct
- CBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- DBoth (A) and (R) are correct and (R) is the correct explanation of ((\mathbf{A}))
Correct answer
D. Both (A) and (R) are correct and (R) is the correct explanation of ((\mathbf{A}))
Step-by-step solution
The benzyl group acts in much the same way using the -system of the benzene ring for conjugation with the p-orbital in the transition state.