CHEM 322aL Lecture Notes - Lecture 5: Diastereomer, Stereochemistry, Bromine
Document Summary
Faq-stereochemistry: case study on diastereomers and enantiomers of reactions depending on achiral or chiral reactants. case 1. achiral. Sometimes, you don"t see (+/-) but you have to know or assume it is (+/-). Show diastereoselectivity using wedges and dashes cleary when you have relative stereochemistry. When you start with an achiral substrate, you will end up with achiral products unless you use chiral reagents. You won"t see chiral reagents for now, maybe later in ochem b. So, you should assume the products are achiral from achiral substrates. Show only one enantiomer of the possible two enatiomer products with (+/-). The product in the box above tells that the product gives only one diastereomer but two enantiomers in a racemic form, becoming achiral. Read questions carefully because i can ask you to draw both enantiomers or only one enantiomer. case 2. If the stereochemistry is specified, it can be chiral unless it has a plane of symmetry.
