Unusual Addition of Bromine to Benzene H H H Br Br2.FeBr3 HBr Br CCI Br H H H H H is not formed Copyright2010 Pearson Prentice Hall,Inc. When bromine adds to benzene,a catalyst such as FeBra is needed. The reaction that occurs is the substitution of a hydrogen by bromine. Addition of Br2 to the double bond is not observed. Chapter 16 6 Chapter 16 6 Unusual Addition of Bromine to Benzene • When bromine adds to benzene, a catalyst such as FeBr3 is needed. • The reaction that occurs is the substitution of a hydrogen by bromine. • Addition of Br2 to the double bond is not observed