4 What are enantiomers? What instrument can you use to distinguish the enantiomers?What is racemic mixture? What is enantiomeric excess (e.e)?5 For a chiral compound with 2 chiral centers how many configurations (also calledisomers in lose sense) are possible. Use 2¹ rule.6Pure (R)- lactic acid has rotation of + 12.31º. A mixture of lactic acid has a specificrotation of +2.71º. Determine the percent composition of two enantiomers (R) and (S) inthe mixture.

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What are enantiomers? What instrument can you use to distinguish the enantiomers? What is racemic mixture? What is enantiomeric excess (e.e)?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

4 What are enantiomers? What instrument can you use to distinguish the enantiomers?
What is racemic mixture? What is enantiomeric excess (e.e)?
5 For a chiral compound with 2 chiral centers how many configurations (also called
isomers in lose sense) are possible. Use 2¹ rule.
6
Pure (R)- lactic acid has rotation of + 12.31º. A mixture of lactic acid has a specific
rotation of +2.71º. Determine the percent composition of two enantiomers (R) and (S) in
the mixture.

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Step 2: General discussion about enantiomer

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Step 3: Polarimeter can detect enantiomer

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Step 4: Racemic mixture consists of two optically active compounds but as a whole it is optically inactive

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Step 5: Enantiomeric excess is the ratio of observed specific rotation to pure enantiomer specific rotation

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