Specific rotation Specific rotation can be used to examine samples of chiral compounds. The following problems are typical calculations and determinations that organic chemists do. Task 1. Specific rotation of enantiopure (R)-carvone is –60°. An unknown sample of carvone shows specific rotation of +42°. What is the ratio of enantiomers in the sample? What is enantiomeric excess of the mixture? Show how you arrived at the answer. 2. Calculate the observed rotation of a solution of 0.5245g of (S)-1-amino-1-phenylethane diluted to a volume of 10.0 mL with methanol at 20 °C, using the D line of a sodium lamp and a 1.00 dm tube. Specific rotation of this material: [a]p = -30.0° 3. Draw the structure of (S)-1-amino-1-phenylethane
Specific rotation Specific rotation can be used to examine samples of chiral compounds. The following problems are typical calculations and determinations that organic chemists do. Task 1. Specific rotation of enantiopure (R)-carvone is –60°. An unknown sample of carvone shows specific rotation of +42°. What is the ratio of enantiomers in the sample? What is enantiomeric excess of the mixture? Show how you arrived at the answer. 2. Calculate the observed rotation of a solution of 0.5245g of (S)-1-amino-1-phenylethane diluted to a volume of 10.0 mL with methanol at 20 °C, using the D line of a sodium lamp and a 1.00 dm tube. Specific rotation of this material: [a]p = -30.0° 3. Draw the structure of (S)-1-amino-1-phenylethane
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...
Related questions
Question
![**Specific Rotation**
Specific rotation can be used to examine samples of chiral compounds. The following problems are typical calculations and determinations that organic chemists do.
**Task**
1. Specific rotation of enantiopure (R)-carvone is −60°. An unknown sample of carvone shows specific rotation of +42°. What is the ratio of enantiomers in the sample? What is enantiomeric excess of the mixture? Show how you arrived at the answer.
2. Calculate the observed rotation of a solution of 0.5245g of (S)-1-amino-1-phenylethane diluted to a volume of 10.0 mL with methanol at 20 °C, using the D line of a sodium lamp and a 1.00 dm tube. Specific rotation of this material: [α]_D = −30.0°
3. Draw the structure of (S)-1-amino-1-phenylethane.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff96ae11a-7960-4c16-8dba-edaf39548349%2F17f0e254-aaaa-40fe-8ff0-4258ddd0f625%2Fk6w754m_processed.png&w=3840&q=75)
Transcribed Image Text:**Specific Rotation**
Specific rotation can be used to examine samples of chiral compounds. The following problems are typical calculations and determinations that organic chemists do.
**Task**
1. Specific rotation of enantiopure (R)-carvone is −60°. An unknown sample of carvone shows specific rotation of +42°. What is the ratio of enantiomers in the sample? What is enantiomeric excess of the mixture? Show how you arrived at the answer.
2. Calculate the observed rotation of a solution of 0.5245g of (S)-1-amino-1-phenylethane diluted to a volume of 10.0 mL with methanol at 20 °C, using the D line of a sodium lamp and a 1.00 dm tube. Specific rotation of this material: [α]_D = −30.0°
3. Draw the structure of (S)-1-amino-1-phenylethane.
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images

Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Recommended textbooks for you

Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education

Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning

Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education

Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning

Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education

Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning

Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY