Which of the following mechanistic steps do you expect in bromination of benzene with Br2 and FeBr3 as a catalyst?
I) formation of Br+[FeBr4]-
II) attack of [FeBr4]- on benzene ring
III) formation of arenium ion
IV) deprotonation of arenium ion
V) nucleophilic attack of Br+
◦ I), III), and IV)
◦ I), II), and IV)
◦ II), III), and V)
◦ III), IV), and V)
◦ II), IV), and V)