Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

4. Alkanes and Cycloalkanes

Equatorial Preference

Organic Chemistry

4. Alkanes and Cycloalkanes

Equatorial Preference

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Multiple Choice

Which is the most stable chair structure for cis-1-isopropyl-3-methylcyclohexane?

The figure illustrates the structure of a molecule. A 6-carbon ring is in a chair conformation. C 1 occupies the top right vertex. C 3 and C 6 are close to each other. C 4 occupies the bottom left vertex. C 2 is single bonded to C H 3 on the upper right in the form of a line. C 4 is single bonded on the upper left to C 2 of a 3-carbon alkane chain depicted as a line structure using 2 zigzag lines.

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Verified step by step guidance

Identify the substituents on the cyclohexane ring: cis-1-isopropyl-3-methylcyclohexane has an isopropyl group and a methyl group on the cyclohexane ring.

Understand the 'cis' configuration: In a cis configuration, both substituents are on the same side of the cyclohexane ring, either both axial or both equatorial.

Draw the chair conformations: Draw two chair conformations of cyclohexane and place the isopropyl and methyl groups in the cis configuration on each conformation.

Evaluate steric interactions: In each conformation, check if the substituents are in axial or equatorial positions. Axial positions can lead to 1,3-diaxial interactions, which are less stable due to steric hindrance.

Determine the most stable conformation: The most stable chair conformation will have the larger substituent (isopropyl group) in the equatorial position to minimize steric strain, while maintaining the cis configuration.