The reaction of toluene with ${\text{Cl}}_2$ in presence of ${\text{FeCl}}_3$ gives predominantly:

The reaction of toluene with ${\text{Cl}}_2$ in the presence of a Lewis acid catalyst like ${\text{FeCl}}_3$ is an electrophilic aromatic substitution.The methyl group (${\text{-CH}}_3$) is an electron-donating group ($+I$ and hyperconjugation) and is $ortho\text{/}$ para-directing. It activates the benzene ring towards electrophiles.Thus, the chlorination occurs at the $ortho$ and $para$ positions, yielding a mixture of $o\text{-chlorotoluene}$ and $p\text{-chlorotoluene}$.Note: In the presence of sunlight and absence of ${\text{FeCl}}_3$, side-chain chlorination occurs to give benzyl chloride.