○ Replacement by Hydrogen 03 Deamination by diazotization 三. Arenediazonium salts react with hypophosphorous acid (H3P02) to yield products in which the diazonium group has been replaced by-—H EtOH /Zn N≡NCl H or HPO 2Organic Chemistry Organic Chemistry Xiamen Xiamen University University Replacement by Hydrogen —— Deamination by diazotization Replacement by Hydrogen —— Deamination by diazotization „ Arenediazonium salts react with hypophosphorous acid (H3PO2) to yield products in which the diazonium group has been replaced by — H N N Cl - + EtOH / Z n or H 3PO 2 H