Q30. Arrange the following compounds in the increasing order of the rate of reaction towards nucleop

Q: What is the correct answer for CUET UG Chemistry Q30?

The correct answer is a. The rate of nucleophilic aromatic substitution (SNAr) is enhanced by electron-withdrawing groups (EWGs) and retarded by electron-donating groups (EDGs), especially at ortho and para positions to the leaving group. Methyl groups are electron-donating. The more methyl groups (or stronger EDG effect) present on the ring, the more the ring is activated, and thus the slower the SNAr reaction. E (2,4,6-

Q: Q30. Arrange the following compounds in the increasing order of the rate of reaction towards nucleophilic substitution. (Structures A=Chlorobenzene, B=p-Chlorotoluene, C=2,4-Dimethylchlorobenzene,…

The correct answer is a. The rate of nucleophilic aromatic substitution (SNAr) is enhanced by electron-withdrawing groups (EWGs) and retarded by electron-donating groups (EDGs), especially at ortho and para positions to the leaving group. Methyl groups are electron-donating. The more methyl groups (or stronger EDG effect) present on the ring, the more the ring is activated, and thus the slower the SNAr reaction. E (2,4,6-

Q: What are the options for this CUET UG Chemistry question?

A. E <D <C<B<A · B. E<C<D <A<B · C. B<C<D <A<E · D. C<B<A<D<E

Question

Q30. Arrange the following compounds in the increasing order of the rate of reaction towards nucleophilic substitution. (Structures A=Chlorobenzene, B=p-Chlorotoluene, C=2,4-Dimethylchlorobenzene, D=m-Chlorotoluene, E=2,4,6-Trimethylchlorobenzene)

FirstInTest · Accepted Answer

The rate of nucleophilic aromatic substitution (SNAr) is enhanced by electron-withdrawing groups (EWGs) and retarded by electron-donating groups (EDGs), especially at ortho and para positions to the leaving group. Methyl groups are electron-donating. The more methyl groups (or stronger EDG effect) present on the ring, the more the ring is activated, and thus the slower the SNAr reaction. E (2,4,6-trimethylchlorobenzene) has three methyl groups, making it the most deactivated and slowest. A (chlorobenzene) has no methyl groups, making it the least deactivated and fastest. The relative positions of C, B, and D depend on the cumulative EDG effects. The given correct order for increasing rate is E < D < C < B < A.

Answer

E <D <C<B<A

Answer

E<C<D <A<B

Answer

B<C<D <A<E

Answer

C<B<A<D<E

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