ORGANIC CHEMISTRY Chapter 21 Mechanism o These reaction take place through an elimination- addition mechanism that involves the formation of an intermediate called benzyne +1NH2 H Elimination Benzyne NH NH3 NH NH3 H nH2 Addition Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 21 Mechanism Mechanism These reaction take place through an elimination￾addition mechanism that involves the formation of an intermediate called benzyne. Cl H Cl + NH2 Elimination Benzyne + NH2 NH2 NH2 NH3 H+ NH3 Addition