In the previous episode we discussed what happens when we use electrophilic aromatic substitution to add a group to a benzene ring, but what happens when you try to add even more groups? Well, things get a little more complicated. In this episode of Crash Course Organic Chemistry, we’ll continue our exploration of EAS reactions by looking at electron donating groups and electron withdrawing groups on benzene, and how they affect what happens when we try to add new groups to the ring.