Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction. (i) 1 -chloro-2-nitrobenzene (ii) Chlorobenzene (iii) 1 -chloro-3-nitrobenzene

Question

Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction. (i) 1 -chloro-2-nitrobenzene (ii) Chlorobenzene (iii) 1 -chloro-3-nitrobenzene (A) ii > i > iii (B) iii > i >ii (C) i > iii > ii (D) ii > iii >i

Tardigrade Admin · Accepted Answer

Presence of - NO 2 group will favour chlorobenzene towards nucleophilic substitution, Ar S N 2 (via addition elimination mechanism) -R effect of - NO 2 at ortho position (I) will favour the reaction most in comparison to -I effectof -N O2 at meta position (III).

Q. Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction.
(i) $1$ -chloro- $2$ -nitrobenzene
(ii) Chlorobenzene
(iii) $1$ -chloro- $3$ -nitrobenzene

ii > i > iii

iii > i >ii

i > iii > ii

ii > iii >i

Presence of $- N O_{2}$ group will favour chlorobenzene towards nucleophilic substitution,
$A r S_{N} 2$ (via addition elimination mechanism) $- R$ effect of $- N O_{2}$ at ortho position (I) will favour the reaction most in comparison to $- I$ effectof $- N O_{2}$ at meta position (III).

Q. Arrange the following in the correct order of reactivity towards nucleophilic substitution reaction. (i) 1 -chloro-2-nitrobenzene (ii) Chlorobenzene (iii) 1 -chloro-3-nitrobenzene