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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![### Understanding the Equatorial OH Group
This section will help you identify molecules with equatorial hydroxyl (OH) groups.
#### Question for Review:
**Which of the following illustrates an equatorial OH?**
The question is accompanied by four molecular structures labeled A, B, C, and D.
1. **Molecule A:** Shows a bicyclic compound with the OH group appearing to be equatorial.
2. **Molecule B:** Displays a similar bicyclic compound, but the OH group is axially oriented.
3. **Molecule C:** Features a cyclohexane ring with the OH group not clearly specified as equatorial.
4. **Molecule D:** Another cyclohexane derivative with an OH group in axial position.
Below the molecular images, multiple-choice options are provided:
- ○ B
- ○ A
- ○ C
- ○ D
### Graphical Explanation:
The molecular structures should be carefully examined to deduce which one places the OH group equatorially. The equatorial position is typically more favorable due to less steric hindrance compared to the axial position.
**Note:** In a chair conformation of cyclohexane, equatorial positions extend outward, roughly perpendicular to the axis of the ring, providing more space to the substituent.
### Correct Answer Analysis:
Based on the provided information, and analyzing the molecular structures:
- Molecule A illustrates the correct equatorial positioning of the OH group.
Thus, the correct choice among the given options is:
- ○ A](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F327c4acc-aab0-4600-9811-c42079067cf3%2Fe7c07ecb-5584-4504-8849-6b98495553c9%2Fjhdbq2q_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Understanding the Equatorial OH Group
This section will help you identify molecules with equatorial hydroxyl (OH) groups.
#### Question for Review:
**Which of the following illustrates an equatorial OH?**
The question is accompanied by four molecular structures labeled A, B, C, and D.
1. **Molecule A:** Shows a bicyclic compound with the OH group appearing to be equatorial.
2. **Molecule B:** Displays a similar bicyclic compound, but the OH group is axially oriented.
3. **Molecule C:** Features a cyclohexane ring with the OH group not clearly specified as equatorial.
4. **Molecule D:** Another cyclohexane derivative with an OH group in axial position.
Below the molecular images, multiple-choice options are provided:
- ○ B
- ○ A
- ○ C
- ○ D
### Graphical Explanation:
The molecular structures should be carefully examined to deduce which one places the OH group equatorially. The equatorial position is typically more favorable due to less steric hindrance compared to the axial position.
**Note:** In a chair conformation of cyclohexane, equatorial positions extend outward, roughly perpendicular to the axis of the ring, providing more space to the substituent.
### Correct Answer Analysis:
Based on the provided information, and analyzing the molecular structures:
- Molecule A illustrates the correct equatorial positioning of the OH group.
Thus, the correct choice among the given options is:
- ○ A
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