JEE Main20249 Apr 2024Morning ShiftChemistryHaloalkanes and HaloarenesActual
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): ( S _ N 2 ) reaction of ( C ₆ H ₅ CH ₂ Br ) occurs more readily than the ( S _ N 2 ) reaction of ( CH ₃ CH ₂ 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
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 (( A ) )
Correct answer
D. Both (A) and (R) are correct and (R) is the correct explanation of (( 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.