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Determine the most stable chair conformation for the following compound: NH2 "NH2 NH2 NH2 H2N. NH2 ZNHNH, H2N NH2

Determine the most stable chair conformation for the following compound: NH2 "NH2 NH2 NH2 H2N. NH2 ZNHNH, H2N NH2

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
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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**Title: Determining the Most Stable Chair Conformation for a Given Compound** **Description:** In this exercise, we aim to determine the most stable chair conformation for a given cyclohexane compound with two attached amino (NH₂) groups. **Compound Description:** The compound given is a cyclohexane ring with two amino groups (NH₂) attached at different positions on the ring. **Objective:** Select the most stable chair conformation from the given options. **Possible Chair Conformations:** 1. **First Chair Conformation:** - Both NH₂ groups are in axial positions. 2. **Second Chair Conformation:** - One NH₂ group is in an equatorial position and the other NH₂ group is in an axial position. 3. **Third Chair Conformation:** - Both NH₂ groups are in equatorial positions. 4. **Fourth Chair Conformation:** - One NH₂ group is in an axial position and the other NH₂ group is in an equatorial position. **Explanation of the Graphical Representations:** - **Axial positions** are represented by bonds that are parallel to the ring axis, either pointing straight up or down. - **Equatorial positions** are represented by bonds that are at an angle, roughly in the plane of the ring, extending outward. **Graphical Diagram Analysis:** - **First Chair Conformation:** - Both amino groups are axial. - **Second Chair Conformation:** - The amino groups are staggered with one axial and one equatorial. - **Third Chair Conformation:** - Both amino groups are equatorial. - **Fourth Chair Conformation:** - Similar to the second, with one axial and one equatorial, but on different carbons than in the second case. **Question:** Which of these conformations represents the most stable chair form for the compound? **Considerations for Stability:** - Typically, equatorial positions are more stable because they reduce steric hindrance. - The preferred conformation usually will place bulky substituents (like NH₂ groups) in equatorial positions to minimize 1,3-diaxial interactions. **Conclusions:** Select the chair diagram where both NH₂ groups are in the equatorial positions as it represents the most stable conformation for this compound due to reduced steric hindrance and minimized 1,3-diaxial interactions
Transcribed Image Text:**Title: Determining the Most Stable Chair Conformation for a Given Compound** **Description:** In this exercise, we aim to determine the most stable chair conformation for a given cyclohexane compound with two attached amino (NH₂) groups. **Compound Description:** The compound given is a cyclohexane ring with two amino groups (NH₂) attached at different positions on the ring. **Objective:** Select the most stable chair conformation from the given options. **Possible Chair Conformations:** 1. **First Chair Conformation:** - Both NH₂ groups are in axial positions. 2. **Second Chair Conformation:** - One NH₂ group is in an equatorial position and the other NH₂ group is in an axial position. 3. **Third Chair Conformation:** - Both NH₂ groups are in equatorial positions. 4. **Fourth Chair Conformation:** - One NH₂ group is in an axial position and the other NH₂ group is in an equatorial position. **Explanation of the Graphical Representations:** - **Axial positions** are represented by bonds that are parallel to the ring axis, either pointing straight up or down. - **Equatorial positions** are represented by bonds that are at an angle, roughly in the plane of the ring, extending outward. **Graphical Diagram Analysis:** - **First Chair Conformation:** - Both amino groups are axial. - **Second Chair Conformation:** - The amino groups are staggered with one axial and one equatorial. - **Third Chair Conformation:** - Both amino groups are equatorial. - **Fourth Chair Conformation:** - Similar to the second, with one axial and one equatorial, but on different carbons than in the second case. **Question:** Which of these conformations represents the most stable chair form for the compound? **Considerations for Stability:** - Typically, equatorial positions are more stable because they reduce steric hindrance. - The preferred conformation usually will place bulky substituents (like NH₂ groups) in equatorial positions to minimize 1,3-diaxial interactions. **Conclusions:** Select the chair diagram where both NH₂ groups are in the equatorial positions as it represents the most stable conformation for this compound due to reduced steric hindrance and minimized 1,3-diaxial interactions
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