Thu December 06, 2012 By: Akash Sundi

why is FeCl3,used indirect halogenation of benzene?

Expert Reply
Thu December 06, 2012
Halogens are not electrophillic enough to break the aromaticity of benzenes as benzenes are normally unreactive.Hence, Halogen needs the help and aid of Lewis Acidic Catalysts to activate it to become a very strong electrophile. Examples of these activated halogens are Ferric Hallides (FeX3) Aluminum Halides (AlX3) where X= Br or Cl.
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