The major product of the bromination of toluene in the presence of iron III bromide as a catalyst is ortho-bromotoluene and para-bromotoluene, with para-bromotoluene being the major product due to steric hindrance.Reaction mechanism:1. Formation of the electrophile:FeBr3 + Br2 Br+ + FeBr4-2. Electrophilic aromatic substitution:Toluene reacts with the electrophile Br+ at the ortho and para positions due to the electron-donating effect of the methyl group, forming a resonance-stabilized carbocation.3. Deprotonation:The carbocation loses a proton to the FeBr4- ion, regenerating the FeBr3 catalyst and forming the final products, ortho-bromotoluene and para-bromotoluene.Overall reaction:Toluene + Br2 + FeBr3 ortho-bromotoluene + para-bromotoluene + HBr + FeBr3