Which of the following compounds has difficulty in breaking of $\mathrm{C}-\mathrm{X}$ bond during…
Which of the following compounds has difficulty in breaking of $\mathrm{C}-\mathrm{X}$ bond during nucleophilic substitution reaction?
o-Nitrochlorobenzene
p-Nitrochlorobenzene
m-Nitrochlorobenzene
2,4,6-Trinitrochlorobenzene
Solution
Greater the number of electron withdrawing groups at $\mathrm{o} / \mathrm{p}$ position, greater is the reactivity towards nucleophilic substitution reaction. Electron withdrawing group at meta position has practically no effect on reactivity. Hence, among the given, m-nitrochlorobenzene has difficulty in breaking of $\mathrm{C}-\mathrm{X}$ bond during nucleophilic substitution.