Week 4 Chapter 3 Chem 30A Answers

Week 4 Chapter 3 Chem 30A Answers - Chemistry 30A Week 4...

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Chemistry 30A – Week 4 Covel Tutorials Objectives: 1. Understand and identify stereoisomers and chiral centers 2. Learn R,S nomenclature 3. Distinguish between enantiomers, diastereomers and meso compounds R,S Nomenclature: Important Steps: 1. Assign priority to four substituent groups based on atomic number 2. Double bonds count as two single bonds 3. Orient priority number 4 away from you to determine R (clockwise) or S (counterclockwise) Determine if the indicated chiral center is R or S: From left to right: R, R From left to right: R, S Name the following molecules, indicating R,S configurations: (3S,4S)-3-methyl-4-(1-methylethyl)-heptane (3R,4R)-4-ethyl-3,4-dimethylheptane
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Chirality: Enantiomers – Non-superimposable mirror images. All chiral centers of enantiomers have switched configurations (ie, S,S to R,R or S,R to R,S, etc.) Diastereomers – Stereoisomers that are not mirror images (2 or more chiral centers) One or more of the chiral centers have switched configurations (ie S,R to S,S or S,R to R,R)
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This note was uploaded on 10/26/2011 for the course CHEM 30A taught by Professor Chatterjee during the Spring '08 term at UCLA.

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Week 4 Chapter 3 Chem 30A Answers - Chemistry 30A Week 4...

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