Question

Write the structures and names of the compounds formed when compound ‘A’ with molecular formula, $$\mathrm{C}{\phantom{A}}_7\mathrm{H}{\phantom{A}}_8$$ is treated with $$\mathrm{Cl}{\phantom{A}}_2$$ in the presence of $$\mathrm{FeCl}{\phantom{A}}_3$$.

Answer 1

The compound with molecular formula $$\mathrm{C}{\phantom{A}}_7\mathrm{H}{\phantom{A}}_8$$ is toluene, $$\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_5\mathrm{CH}{\phantom{A}}_3$$. Since $${\phantom{A}}_{\phantom{}}^{\phantom{-}}{\phantom{A}}_{\phantom{2}}^{\phantom{2}-}\mathrm{CH}{\phantom{A}}_3$$ group is o-, p-directing, therefore, chlorination of toluene gives o-chlorotoluene and p-chlorotoluene, in which the p-isomer predominates.