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Concept explainers
(a)
Interpretation:
The percent of each enantiomer present for the given value needs to be calculated:
90% ee
Concept Introduction :
If one enantiomer dominates the other in a mixture of two, the excess of that enantiomer is then stated as a percentage of the total amount of that enantiomer. It also gives some information about the mixture's overall optical rotation.
(b)
Interpretation:
The percent of each enantiomer present for the given value needs to be calculated:
99%ee
Concept Introduction :
If one enantiomer dominates the other in a mixture of two, the excess of that enantiomer is then stated as a percentage of the total amount of that enantiomer. It also gives some information about the mixture's overall optical rotation.
(c)
Interpretation:
The percent of each enantiomer present for the given value needs to be calculated:
60%ee
Concept Introduction :
If one enantiomer dominates the other in a mixture of two, the excess of that enantiomer is then stated as a percentage of the total amount of that enantiomer. It also gives some information about the mixture's overall optical rotation.
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Chapter 5 Solutions
ORGANIC CHEMISTRY (LOOSELEAF)
- Each H↔H eclipsing interaction in ethane costs about 4.0 kJ/mol. How many such interactions are percent in cyclopropane? What fraction of the overall 115 kJ/mol (27.5 kcal/mol) strain energy of cyclopropane is due to torsional strain.arrow_forwardClassify each compound as identical to A or its enantiomer. CHO CHO H OH CHO a. CH,CH-C--OH CumCH,CH3 H OH b. d. HO C. ČH,CH3 н он CH;CH CHO CHO Aarrow_forwardExplain each statement by referring to compounds A-E. он он HO .OH CI OH A в E a. A has a mirror image but no enantiomer. b. B has an enantiomer and no diastereomer. c. C has both an enantiomer and a diastereomer. d. D has a diastereomer but no enatiomer. e. E has a diastereomer but no enantiomer. E..arrow_forward
- Locate the stereogenic center in each compound and draw both enantiomers. b. HO, OH С. HO. NH2 a.arrow_forwardWhat is the ee for each of the following mixtures of enantiomers A and B?a. 95% A and 5% Bb. 85% A and 15% Barrow_forwardIf a mixture has an ee of 90%, what is the percentage of each enantiomer? Multiple Choice 80% : 20% 55% : 45% 95% : 5% 65% : 35%arrow_forward
- Which of the following pairs of structures represent a pair of enantiomers? a. b. C. d. O a O b Oc C Od H3C... H Br C HC NC H3CH₂C COOH H... C CN CH3 Br HC H₂N CH3 OH COOH CN HC-CH3 Br Br H.C. HOOC OH H... C H₂C CN H3C C H₂N CH₂CH3 COOH Harrow_forwardWhat is the significance of a reaction that occurs in 94% enantiomeric excess? A. The product contains 94% of one enantiomer and 6% of other products B. The product contains 94% of one enantiomer and 6% of another enantiomer C. The product contains an enantiomer that is 94% pure. D. Product contains 97% of one enantiomer and 3% of another enantiomerarrow_forwardMatch the pairs of compounds with the type of isomerism a. functional isomer b. skeletal isomer c. positional isomer d. cis, trans configuration e. diastereomer f. e,z, configuration g. enantiomerarrow_forward
- Which of the following pairs of structures represent a pair of enantiomers? a. b. d. H₂C H NC H₂CH₂C Br HC. H₂N H.... CN COOH Br CH3 CH3 OH COOH H... Br H... HOOC H₂C CN OH HC₂ H₂C H₂N Br CH3 CN CH₂CH3 COOH CHarrow_forward68. A reaction mixture is three parts of one enantiomer and one part of the other. What is the percent ee of this mixture? A) 75 B) 40 C) 65 D) 50arrow_forward5 6 How many stereoisomers of the following molecule are possible in principle? Attachments HO H₂C A. 8 B. 128 C. 64 D. 32 E. 16 CH3 HO What is the relationship between the following two compounds? Attachments HO OH OH moja moja A. They are diastereomers B. They are enantiomers ⒸC. They are mesomers D. None of the above NH₂ OHarrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning
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