Halogenation of Benzene Halogenation of Benzene Halogenation of Benzene Halogenation of Benzene Benzene reacts with halogens in the presence of Lewis acid like FeCl3, FeBr3 to form aryl halides. This reaction is termed as halogenation of benzene. Halogene of Lewis acid and the halogen which reacts with benzne must be same. Mechanism of Halogenation of Benzene Nitration of Benzene Sulphonation of Benzene Halogenation of Benzene Alkylation of Benzene Acylation of Benzene