The decreasing order of reactivity of the fol | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The reactivity of benzyl halides towards $S_{N}2$ reactions is primarily governed by the electronic effects of substituents on the benzene ring. E

Vedclass · Accepted Answer

$(II) > (III) > (IV) > (I)$

Vedclass · Answer

(B) The reactivity of benzyl halides towards $S_{N}2$ reactions is primarily governed by the electronic effects of substituents on the benzene ring. Electron-withdrawing groups (EWGs) like $-NO_2$ increase the reactivity towards $S_{N}2$ by stabilizing the transition state through their $-I$ (inductive) and $-R$ (resonance) effects.In compound $(II)$,the two $-NO_2$ groups are at the ortho and meta positions,exerting strong $-I$ and $-R$ effects. In compound $(III)$,the two $-NO_2$ groups are at the meta and para positions,exerting $-I$ and $-R$ effects,but the overall electron-withdrawing strength is slightly less than in $(II)$ due to the positioning.In compound $(IV)$,the two $-NO_2$ groups are at the meta positions,exerting only $-I$ effects.Compound $(I)$ has no electron-withdrawing groups.Therefore,the decreasing order of reactivity is $(II) > (III) > (IV) > (I)$.

The decreasing order of reactivity of the following compounds towards nucleophilic substitution $(S_{N}2)$ is :

Similar Questions

Chloropicrin is obtained by the reaction of

Identify the statement which is not correct?

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $NaOH$ gives :

The following reaction,$(CH_3)_3CBr + H_2O \to (CH_3)_3COH + HBr$,is an example of:

Identify the chiral molecule from the following:

Vedclass Test Series

Exam Paper Generator

Online Exam Module