ORGANIC CHEMISTRY Chapter 5 5.isomerism: Constitutional somers and stereoisomers 异构现象:构造异构和立体异构 Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 5 5.1 Isomerism: Constitutional Isomers and Stereoisomers 异构现象：构造异构和立体异构