You are trying to determine the optical purity (% enantiomeric excess) of a compound tha you have just synthesized. You measure the rotation of plane-polarized light of a 0.5 g/ml solution and find the rotation to be +16.2 degrees (clockwise). Given the pure (-) isomer has a specific rotation of -45 degrees, what is the optical purity of the compound? Show you work.

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...
icon
Related questions
Question
**Objective: Determine Optical Purity**

You are tasked with determining the optical purity (% enantiomeric excess) of a compound you have synthesized. A 0.5 g/mL solution is prepared, and the rotation of plane-polarized light is measured to be +16.2 degrees (clockwise). The pure (-) isomer of this compound has a specific rotation of -45 degrees. Calculate the optical purity of the compound, and show your work.

**Explanation of Terms:**

- **Optical Purity (% Enantiomeric Excess):** A measure of the excess of one enantiomer over the other in a mixture. It is calculated using the observed rotation and the specific rotation of the pure enantiomer.
- **Specific Rotation:** The rotation observed for a compound at a specified temperature and concentration.
- **Enantiomers:** Molecules that are mirror images of each other.

The task involves using the provided data to calculate the percentage of the predominant enantiomer in the mixture.
Transcribed Image Text:**Objective: Determine Optical Purity** You are tasked with determining the optical purity (% enantiomeric excess) of a compound you have synthesized. A 0.5 g/mL solution is prepared, and the rotation of plane-polarized light is measured to be +16.2 degrees (clockwise). The pure (-) isomer of this compound has a specific rotation of -45 degrees. Calculate the optical purity of the compound, and show your work. **Explanation of Terms:** - **Optical Purity (% Enantiomeric Excess):** A measure of the excess of one enantiomer over the other in a mixture. It is calculated using the observed rotation and the specific rotation of the pure enantiomer. - **Specific Rotation:** The rotation observed for a compound at a specified temperature and concentration. - **Enantiomers:** Molecules that are mirror images of each other. The task involves using the provided data to calculate the percentage of the predominant enantiomer in the mixture.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY