1559T.ch05_70-9910/22/0520:19Page70 EQA 5 Stereoisomers 一g咖in This chpereoof te一 o yet.do n't wait any longe Outline of the Chapter 5-1 Chiral Molecules The key definitions:what makes an object different from its miror image. 52g of chiral molecules 5-3 The R-S Sequence Rules How to name chiral molecules 5-4 Fischer Projections How to represent chiral molecules in two dimensions. Diastereo ers n relationships between more complex molecules.Moves toward biological systems. 5-8 Resolution of Enantiomers Practical【echniques- Keys to the Chapter 5-1.Chiral Molecules In this chapter wil be introduced to many new terms.Follow their definitions alon with the structures given as examples.The first new term is the chapter title:stereoisomer.In brief.stereoisomers are molecules 705 Stereoisomers By now you are well aware that molecules are three-dimensional objects. This chapter explores some of the more subtle, but extremely critical, consequences of this fact. If you have not done so yet, don’t wait any longer to obtain a set of models to aid you in visualizing the structures described in this chapter. For many students, the isomeric relationships discussed here are the most difficult ones encountered in organic chemistry, and they are important later on in descriptions of several types of compounds and reactions. The implications for bio￾logical chemistry are especially significant. Outline of the Chapter 5-1 Chiral Molecules The key definitions: what makes an object different from its mirror image. 5-2 Optical Activity Physical properties of chiral molecules. 5-3 The R–S Sequence Rules How to name chiral molecules. 5-4 Fischer Projections How to represent chiral molecules in two dimensions. 5-5 and 5-6 Molecules Incorporating Several Stereocenters: Diastereomers Further elaboration, including the introduction of several new terms describing relationships between more complex molecules. Moves toward biological systems. 5-7 Stereochemistry in Chemical Reactions Ground rules. 5-8 Resolution of Enantiomers Practical techniques. Keys to the Chapter 5-1. Chiral Molecules In this chapter you will be introduced to many new terms. Follow their definitions along with the structures given as examples. The first new term is the chapter title: stereoisomer. In brief, stereoisomers are molecules 70 1559T_ch05_70-98 10/22/05 20:19 Page 70