The decreasing order of reactivity of the giv | vedclass

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

Question

(B) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (like $-NO_2$) on the benzen

Vedclass · Accepted Answer

$II > IV > III > I$

Vedclass · Answer

(B) Nucleophilic aromatic substitution $(S_NAr)$ reactions are facilitated by the presence of electron-withdrawing groups (like $-NO_2$) on the benzene ring,especially at the ortho and para positions.$1$. Compound $(II)$ has three $-NO_2$ groups (at $2, 4, 6$ positions),making it the most reactive.$2$. Compound $(IV)$ has two $-NO_2$ groups (at $2, 4$ positions),making it the second most reactive.$3$. Compound $(III)$ has one $-NO_2$ group at the para position,which is more effective than the meta position.$4$. Compound $(I)$ has one $-NO_2$ group at the meta position,which is the least effective for stabilizing the intermediate carbanion.Thus,the decreasing order of reactivity is $(II) > (IV) > (III) > (I)$.

The decreasing order of reactivity of the given compounds towards nucleophilic substitution with aqueous $NaOH$ is:
$(I)$ $1$-bromo-$3$-nitrobenzene
$(II)$ $1$-bromo-$2,4,6$-trinitrobenzene
$(III)$ $1$-bromo-$4$-nitrobenzene
$(IV)$ $1$-bromo-$2,4$-dinitrobenzene

Similar Questions

Give chemical reactions for the following conversions:
$(1)$ Nitrobenzene from phenol
$(2)$ $p$-methylacetophenone from benzene

$DDT$ can be prepared by reacting chlorobenzene (in the presence of conc. $H_2SO_4$) with

Identify the correct order of reactivity of the following haloarenes on treatment with $NaOH$?

Which one of the following is least reactive in a nucleophilic substitution reaction?

Describe the reactions of aryl halides with metals.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The decreasing order of reactivity of the given compounds towards nucleophilic substitution with aqueous $NaOH$ is:$(I)$ $1$-bromo-$3$-nitrobenzene$(II)$ $1$-bromo-$2,4,6$-trinitrobenzene$(III)$ $1$-bromo-$4$-nitrobenzene$(IV)$ $1$-bromo-$2,4$-dinitrobenzene