Chlorination and lodination 。 Chlorination is similar to bromination. Use AIClg as the Lewis acid catalyst. lodination requires an acidic oxidizing agent,like nitric acid,which oxidizes the iodine to an iodonium ion. H HNO3 +1/2 I2>I NO2 H2O => Chapter 17 7Chapter 17 7 Chlorination and Iodination • Chlorination is similar to bromination. Use AlCl3 as the Lewis acid catalyst. • Iodination requires an acidic oxidizing agent, like nitric acid, which oxidizes the iodine to an iodonium ion. H + HNO3 I 2 1/2 I + + + + NO2 + H2 O =>