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Which of the following chair conformations is the most stable? H H H A B B A is more stable than B if the solvent is polar protic. B is more stable tha the solvent is polar aprotic. A and B have the same stability. A

Which of the following chair conformations is the most stable? H H H A B B A is more stable than B if the solvent is polar protic. B is more stable tha the solvent is polar aprotic. A and B have the same stability. A

Chemistry
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
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### Chair Conformations Stability Question **Question:** Which of the following chair conformations is the most stable? **Diagrams:** 1. **A** (Equatorial Position) - A cyclohexane chair conformation with hydrogen (H) in the equatorial position. 2. **B** (Axial Position) - A cyclohexane chair conformation with hydrogen (H) in the axial position. **Options:** - ○ B - ○ A is more stable than B if the solvent is polar protic. B is more stable than A if the solvent is polar aprotic. - ○ A and B have the same stability. - ○ A **Explanation:** In cyclohexane chair conformations, substituents in the equatorial position (diagram A) generally experience less steric hindrance compared to those in the axial position (diagram B). This typically makes the equatorial conformation more stable. However, the stability can also be influenced by the type of solvent, as mentioned in one of the given options. **Note:** For further understanding, consider the influence of different solvents and substituents on the stability of chair conformations. Generally, large substituents prefer the equatorial position to minimize 1,3-diaxial interactions.
Transcribed Image Text:### Chair Conformations Stability Question **Question:** Which of the following chair conformations is the most stable? **Diagrams:** 1. **A** (Equatorial Position) - A cyclohexane chair conformation with hydrogen (H) in the equatorial position. 2. **B** (Axial Position) - A cyclohexane chair conformation with hydrogen (H) in the axial position. **Options:** - ○ B - ○ A is more stable than B if the solvent is polar protic. B is more stable than A if the solvent is polar aprotic. - ○ A and B have the same stability. - ○ A **Explanation:** In cyclohexane chair conformations, substituents in the equatorial position (diagram A) generally experience less steric hindrance compared to those in the axial position (diagram B). This typically makes the equatorial conformation more stable. However, the stability can also be influenced by the type of solvent, as mentioned in one of the given options. **Note:** For further understanding, consider the influence of different solvents and substituents on the stability of chair conformations. Generally, large substituents prefer the equatorial position to minimize 1,3-diaxial interactions.
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