The decreasing order of reactivity of m-nitro | vedclass

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

Question

(B) The reaction of aryl halides with $OH^{-}$ ions follows the $S_NAr$ (Nucleophilic Aromatic Substitution) mechanism.In $S_NAr$ reactions,the presen

Vedclass · Accepted Answer

$II > IV > III > I$

Vedclass · Answer

(B) The reaction of aryl halides with $OH^{-}$ ions follows the $S_NAr$ (Nucleophilic Aromatic Substitution) mechanism.In $S_NAr$ reactions,the presence of electron-withdrawing groups $(-NO_2)$ at ortho and para positions stabilizes the Meisenheimer complex intermediate.More $-NO_2$ groups at ortho and para positions lead to higher reactivity.- $II$ ($2,4,6$-trinitrobromobenzene) has three $-NO_2$ groups (two ortho,one para).- $IV$ ($2,4$-dinitrobromobenzene) has two $-NO_2$ groups (one ortho,one para).- $III$ ($p$-nitrobromobenzene) has one $-NO_2$ group (para).- $I$ ($m$-nitrobromobenzene) has one $-NO_2$ group (meta),which is less effective at stabilizing the intermediate compared to ortho/para positions.Therefore,the decreasing order of reactivity is $II > IV > III > I$.

The decreasing order of reactivity of $m$-nitrobromobenzene $(I)$,$2,4,6$-trinitrobromobenzene $(II)$,$p$-nitrobromobenzene $(III)$,and $2,4$-dinitrobromobenzene $(IV)$ towards $OH^{-}$ ions is

Similar Questions

What is the intermediate compound formed when chlorobenzene is treated with fused $NaOH$ under pressure?

Provide the following electrophilic substitution reactions of aryl halides:
$(i)$ Halogenation
$(ii)$ Nitration
$(iii)$ Sulphonation
$(iv)$ Friedel-Crafts reaction

Which of the following reactions cannot be used to prepare an aromatic nitrile $(ArCN)$?

Which of the following gives only one monosubstituted product upon further electrophilic substitution?

The reaction of an aromatic halogen compound with an alkyl halide in the presence of sodium and ether is called:

Vedclass Test Series

Exam Paper Generator

Online Exam Module