Question

Compare the rate of aromatic nuleophilic substitution reaction of the following compounds

• A. IV > II > III > I
• B. III > II > I > IV
• C. I > II > III > IV
• D. IV > III > II > I

Answer 1

The correct option is D IV > III > II > I

Ans . (d)
Rate of aromatic nucleophilic substitution reaction depends upon type of halogen and electronic effect of the group present on the ring. Since all the four molecules have same halogen group i.e. 'Cl'. The rate of aromatic nucleophilic substitution increases with the presence of more number electron withdrawing groups (-I, -M effect).