# What happens when FeF3 is reacted with benzene? [closed]

My text book says that halobenzenes can be prepared by aromatic substitution on benzene ring by using Fe or FeX3 as Lewis acid but this method isn't useful for preparation of fluoro benzene because of it's high reactivity.

My question is what will be the product if FeF3 is reacted with benzene, I tried searching a bit on internet but couldn't find anything helpful.

• Halides are only catalysts in Friedel-Crafts halogenation. Without halogen there's no reaction. Nov 2 '20 at 14:02
• Ferric halides plus elemental halogen (Cl2, Br2) give the functional equivalent of Hal+. The functional equivalent of F+ cannot be made this way. Nov 2 '20 at 14:27
• Nov 2 '20 at 15:10

(Replace $$Cl$$ with $$F$$ and since fluorine is more reactive UV light is not needed.)