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Practice Problems: For the below molecules, draw the chair conformation in its most stable stale. If both states have the same degree of stability, draw both.

Practice Problems: For the below molecules, draw the chair conformation in its most stable stale. If both states have the same degree of stability, draw both.

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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The image contains three chemical structures, labeled with numbers 4, 5, and 6. Structure 4: - This molecule depicts a cyclohexane ring with two additional methyl groups (CH₃) at two adjacent carbon atoms. Structure 5: - This structure shows a cyclohexane ring with one chlorine atom (Cl) attached to one carbon, and a methyl group attached to another carbon in the ring. Structure 6: - This molecule is a cyclohexane ring with two chlorine atoms attached to different carbons in the ring and one methyl group attached to another carbon in the ring. These chemical structures are examples of different substituted cyclohexanes. In these diagrams, carbon atoms at the vertices of the hexagon are implied, and hydrogen atoms are not shown for simplicity.
Transcribed Image Text:The image contains three chemical structures, labeled with numbers 4, 5, and 6. Structure 4: - This molecule depicts a cyclohexane ring with two additional methyl groups (CH₃) at two adjacent carbon atoms. Structure 5: - This structure shows a cyclohexane ring with one chlorine atom (Cl) attached to one carbon, and a methyl group attached to another carbon in the ring. Structure 6: - This molecule is a cyclohexane ring with two chlorine atoms attached to different carbons in the ring and one methyl group attached to another carbon in the ring. These chemical structures are examples of different substituted cyclohexanes. In these diagrams, carbon atoms at the vertices of the hexagon are implied, and hydrogen atoms are not shown for simplicity.
**F. Stability of Cycloalkanes - Ring Strain** Among the cyclic compounds found in nature, 5 or 6 member ring compounds are most stable. 3 and 4 member rings are less stable due to angle strain, described by Bayer Strain theory. Cyclic compounds can exist in puckered structures; more than 5 member rings are puckered and gain stability. Among different puckered conformations of cyclohexane, the Chair conformation is more stable. When there are substituents, use the following tips to determine which chair conformation is most stable: I. The largest substituent should be in the equatorial position. In the axial position, the substituent will experience 1,3-diaxial interactions, which is less stable. II. In the situation where two substituents are the same and one occupies the axial position while the other occupies the equatorial position, both chair conformations have the same degree of stability. **Practice Problems:** For the molecules below, draw the chair conformation in its most stable state. If both states have the same degree of stability, draw both. 1. [List or diagram of molecules for practice]
Transcribed Image Text:**F. Stability of Cycloalkanes - Ring Strain** Among the cyclic compounds found in nature, 5 or 6 member ring compounds are most stable. 3 and 4 member rings are less stable due to angle strain, described by Bayer Strain theory. Cyclic compounds can exist in puckered structures; more than 5 member rings are puckered and gain stability. Among different puckered conformations of cyclohexane, the Chair conformation is more stable. When there are substituents, use the following tips to determine which chair conformation is most stable: I. The largest substituent should be in the equatorial position. In the axial position, the substituent will experience 1,3-diaxial interactions, which is less stable. II. In the situation where two substituents are the same and one occupies the axial position while the other occupies the equatorial position, both chair conformations have the same degree of stability. **Practice Problems:** For the molecules below, draw the chair conformation in its most stable state. If both states have the same degree of stability, draw both. 1. [List or diagram of molecules for practice]
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