Electrophilic Aromatic Substitution: Monosubstitution 22.7
Write a stepwise mechanism for each of the following reactions. Use curved arrows to show the flow of electrons in each step:

(a) FeCl3 + Cl2
(b) HCl + AlCl3
(c) HCl + SnCl4
(d) CH3CH2Cl + AlCl3
(e) 2HCl