8. Draw the following a. Stereochemical configuration of the enantiomer of (2S, 4R)-2, 4- octanediol? b. Stereochemical configurations of the two diastereomers of (2S, 4R)-2, 4- octanediol?
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- 1.What is the absolute configuration of this isomer of 2,3-dihydroxybutanal? pls explain.2. What is the absolute configuration of the enantiomer of the isomer?1) Are the molecules A and B... conformational isomers? Diastereomers? Enantiomers? Position isomers? Non-related? 2) What about the molecules B and C? 3) What about the molecules C and D?If a sample has 75 % ee of the stereoisomer R, what is the % of S in the sample? A. 12.5 B. I do not know C. 50 D. 75 E. 25
- A) For a molecule with three chiral carbons the possible number of stereoisomers is: 4, 8, 6 or 2 B)Which of the following has a S configuration: (Image)Provide stereochemical information (R or S for each chiral center)Following are stereorepresentations for the four stereoisomers of 3-chloro-2-butanol. (a) Assign an R or S configuration to each chiral center. (b) Which compounds are enantiomers? (c) Which compound are diastereomers?
- (A) How many chirality centers does the following molecule contain? (B) How many stereoisomers are possible for this molecule? (C) Assign R,S designation to each chiral carbonLabel each molecule with chiral centers (R) and (S). Which ones have more than one?absolute configuration of the chirality center ? C1 is left and C2 is right
- a) What are the differences between major and minor stereoisomers. b) how can we use major and minor products to determine stereospecificity in an experiment.Draw the bond-line formula of 3,4-dimethylhexane. Is geometric isomerism observed in 3,4-dimethylhexane? What structural features must be present for stereoisomers to exist? (4 marks) (b) (1) Using Fischer projection, draw all the stereoisomers of 3-chloro-2-hydroxypentanoic acid. (4 marks) (ii) Assign the chiral centre(s) with R/S configurations in part (b)(i). Indicate which are enantiomers, diastereomers and meso compounds (if any).Draw a molecule that has one R stereocenter.