Stereoisomers Isomers that have the same connectivity but that differ in the arrangement of their atoms in space Enantiomers(对映异构) Diastereomers(非立体对映异构 (Stereoisomers that are mirror images of each other, but it is notsuperposable互为实物与镜象关系,S Stereoisomers that are not mirror 但不重叠) images of each other) CH3 CH HILlII cH3cH∞x HO H3CH2C OH CH2CH3 H H CH H 2-butanol Cis transStereoisomers (Isomers that have the same connectivity but that differ in the arrangement of their atoms in space Enantiomers (对 映 异 构 ） Diastereomers (非 立 体 对 映 异 构 ) (Stereoisomers that are mirror images of each other, but it is notsuperposable 互 为 实 物 与 镜 象 关 系 ， 但 不 重 叠 ) (Stereoisomers that are not mirror images of each other) CH3 H3CH2C OH H CH3 HO CH2CH3 H 2-butanol CH3 H CH3 H CH3 H H CH3 Cis - trans - H Cl H Cl H Cl Cl H