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- A compound that contains two different stereocenters can exist as four optically active stereoisomers. The flying wedge representations of the four stereoisomers are given below: ÇOOH ÇOOH ÇOOH ÇOOH H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH HO-C-H HO-C-H H-C-OH ČH3 ČH3 ČH3 ČH3 II II IV What is the relationship between: 96.I and II? 97. I and IV? 98. I and III? II and III? III and IV? II and IV?Count the chirality centers in each molecule below. CHO CH, ndete O 4 chiral centers O3 chiral centers O1 hiral centerHow many the chirality center(s) can you see in the following compound. 02 none H3C. 03 01 OH Br НО CH3
- A compound that contains two different stereocenters can exist as four optically active stereoisomers. The flying wedge representations of the four stereoisomers are given below: ÇOOH COOH ÇOOH COOH H-C-OH HO-C-H H-C-OH HO-C-H H-C-OH HO-C-H HO-C-H H-C-OH CH3 ČH3 ČH3 ČH3 II IV What is the relationship between: III and IV? II and IV? П аnd III) 96.I and II? 97.I and IV? 98.I and III?Consider the following pairs of structures. Identify the relationship between them by describing them as representing enantiomers, diastereomers, constitutional isomers, or two molecules of the same compound. H H3C" CH3 Br Hitm Br enantiomers constitutional isomers diastereomers H B H F F two molecules of the same compound CH3 H Ba CH3H3C CH3 chiral achiral H H₂C CH3 H chiral achiral CI CH3 CH3 chiral achiral Br Br chiral achiral
- Identify the absolute configuration of the chirality centers in each of the following compounds as R or S. Note: if multiple chirality centers are present, indicate the stereochemical designations as: RR, SS, RS, or SR. (Other terms used for chirality center include chiral center, stereocenter, and stereogenic center.) H₂N H HD HO OH OH CH3Ephedrine, a stimulant and illegal drug is an optically active compound with two chiral centers. OH NHCH3 CH3 Ephedrine a. In the structure of ephedrine on the answer sheet, mark each chiral center with an asterisk. b. How many stereoisomer/s does ephedrine have? Show necessary solutions on the answer sheet. c. Compound EPS is a stereoisomer of ephedrine. Determine the absolute configuration (R or S) at carbons A and B of compound EPS.Highlight the chirality (or stereogenic) center(s) in the given compound. A compound may have one or more stereogenic centers. msor N H OH X
- Simvastatin (trade name: Zocor™M) is a pharmaceutical used to treat elevated blood lipids (i.e. high cholesterol). It contains 7 chirality centers (which allows for 128 different stereoisomers!) Determine the configuration of each chirality center. HOL. O CH3 H O H Ou yot H O XII H по / CH3VIII. Assign R, S configurations to each chirality center in the molecule below. Br CH3 X OH CH3 I I (7 For the following compound with two chiral centers assign 'R' and 'S' configurations. Draw enantiomers and diastereomers for the following compound? How many enantiomers and diastereomers are possible. Assign (R) and (S) configurations for all the structures. What are diastereomers? COOH H CI € Br -H CH3