/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q.31 For the given ee values, calcula... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 5: Q.31 (page 200)

For the given ee values, calculate the percentage of each enantiomer present.

a. 90% ee

b. 99% ee

c. 60% ee

Short Answer

Expert verified
  1. 95% A and 5% B.
  2. 99.5% A and 0.5% B.
  3. 80% A and 20% B.

Step by step solution

01

Enantiomeric excess (ee) 

The enantiomeric excess comes to explain the particular enantiomer鈥檚 excess amount in the given mixture.

02

Calculation of the ee

The formula to calculate the ee is as follows:

ee=%ofoneenantiomer-%ofotherenantiomer

03

Explanation

a. From the formula of ee, we can easily calculate the percentage of enantiomers as:

90% ee means 90% excess of A, and 10% racemic mixture of A and B (5% each); therefore, 95% A and 5% B.

Therefore, the percentage of enantiomers is 90 % of A and 5% of B.

b. From the formula of ee, we can easily calculate the percentage of enantiomers as:

99% ee means 99% excess of A, and 1% racemic mixture of A and B (0.5% each); therefore, 99.5% A and 0.5% B.

Therefore, the percentage of enantiomers is 99.5 % of A and 0.5% of B.

c.From the formula of ee, we can easily calculate the percentage of enantiomers as:

60% ee means 60% excess of A, and 40% racemic mixture of A and B (20% each); therefore, 80% A and 20% B.

Therefore, the percentage of enantiomers is 80 % of A and 20% of B.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Which group in each pair is assigned the higher priority in R,S nomenclature?

  1. -CD3,-CH3
  2. localid="1648446360910" -CH(CH3)2,-CH2OH
  3. localid="1648447310055" -CH2Cl,-CH2CH2CH2Br
  4. -CH2NH2,-NHCH3

Consider Newman projections (A鈥揇) for four-carbon carbohydrates. How is each pairof compounds related: (a) A and B; (b) A and C; (c) A and D; (d) C and D? Choose fromidentical molecules, enantiomers, or diastereomers.

What is the ee for each of the following mixtures of enantiomers A and B?

a. 95% A and 5% B

b. 85% A and 15% B

a. Locate the stereogenic centres in the ball-and-stick model of lisinopril, a drug used to treat high blood pressure.

b. Label each stereogenic centre as R or S.

A limited number of chiral compounds having no stereogenic centers exist. For example, although A is achiral, constitutional isomer B is chiral. Make models and explain this observation. Compounds containing two double bonds that share a single carbon atom are called allenes. Locate the allene in the antibiotic mycomycin and decide whether mycomycin is chiral or achiral.

贬颁鈮-颁鈮-颁贬=颁=颁贬-颁贬=颁贬-颁贬=颁贬-颁贬2CO2H
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Reactions

Read Explanation

Making Measurements

Read Explanation

The Earths Atmosphere

Read Explanation

Organic Chemistry

Read Explanation

Kinetics

Read Explanation

Chemical Analysis

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.