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18 Nov 2019
BASIC ORGO QUESTIONS
OH D) 7. How many stereoisomers of menthol are possible? (A) 3 (B) 6 (D) 8 8. Which chair representation indicates levorotatory menthol? 9. Identify the chair representation for dextrorotatory isomer of menthol. 10. Identify the chair representation for a diastereomer of menthol. 11. Identify the correct configuration of (-) menthol. (A) (1S,2R,5S) (B) (1S, 2R,5R) (C) (1R,25,5R) (D) (1R,2R,5S) 12. The specific rotation of optically pure ()-menthol is -50°. The specific rotation of an impure sample containing a mixture of enantiomers of menthol was measured to be +209. Calculate the enantiomeric excess (ee) and the percentages of both enantiomers of menthol present in the sample. In the following table, identify the set that has all correct values Enantiomeric Excess 20% ee of +-menthol 30% ee of (+)-menthol 30% ee of (-)-menthol 40% ee of +-menthol 40% ee of (-)-menthol | %of(-)-menthol o of (+) menthol 80% 2096 3596 65% 3096 70% E) | 30
BASIC ORGO QUESTIONS
OH D) 7. How many stereoisomers of menthol are possible? (A) 3 (B) 6 (D) 8 8. Which chair representation indicates levorotatory menthol? 9. Identify the chair representation for dextrorotatory isomer of menthol. 10. Identify the chair representation for a diastereomer of menthol. 11. Identify the correct configuration of (-) menthol. (A) (1S,2R,5S) (B) (1S, 2R,5R) (C) (1R,25,5R) (D) (1R,2R,5S) 12. The specific rotation of optically pure ()-menthol is -50°. The specific rotation of an impure sample containing a mixture of enantiomers of menthol was measured to be +209. Calculate the enantiomeric excess (ee) and the percentages of both enantiomers of menthol present in the sample. In the following table, identify the set that has all correct values Enantiomeric Excess 20% ee of +-menthol 30% ee of (+)-menthol 30% ee of (-)-menthol 40% ee of +-menthol 40% ee of (-)-menthol | %of(-)-menthol o of (+) menthol 80% 2096 3596 65% 3096 70% E) | 30
Casey DurganLv2
2 Oct 2019