Given below are two statements | JEE Main 2024

JEE MAIN 2024

04-04-24 S1

Question

Given below are two statements one is labelled as Assertion (A) and the other is labelled as
Reason (R):
Assertion $(\mathrm{A})$ - $\mathrm{S}_{\mathrm{N}} 2$ 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:

Select the correct option:

(A) is not correct but (R) is correct

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Both (A) and (R) are correct and (R) is the correct explanation of (A)

(A) is correct but (R) is not correct

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

The benzyl group acts in much the same way using the π-system of the benzene ring for conjugation with the p-orbital in the transition state.