Unusual Reactions Alkene KMno>diol (addition) Benzene KMnO4->no reaction. Alkene Br2/CCl4>dibromide (addition) -Benzene Br2/CCl4->no reaction. With FeCl3 catalyst,Br2 reacts with benzene to form bromobenzene HBr (substitution!). -Double bonds remain.Unusual Reactions ❖Alkene + KMnO4 → diol (addition) ◼Benzene + KMnO4 → no reaction. ❖Alkene + Br2/CCl4 → dibromide (addition) ◼Benzene + Br2/CCl4 → no reaction. ❖With FeCl3 catalyst, Br2 reacts with benzene to form bromobenzene + HBr (substitution!). ◼Double bonds remain