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

Naming Cycloalkanes

Organic Chemistry

4. Alkanes and Cycloalkanes

Naming Cycloalkanes

Previous problemNext problem

5:33 minutes

Problem 70b

Textbook Question

Draw skeletal structures for the following:
b. 1,3-dimethylcyclohexane

Verified step by step guidance

Start by identifying the parent structure: The name 'cyclohexane' indicates that the parent structure is a six-membered cyclic ring. Draw a hexagon to represent the cyclohexane ring.

Locate the substituents: The name '1,3-dimethyl' indicates that there are two methyl groups (-CH₃) attached to the cyclohexane ring at positions 1 and 3.

Assign numbering to the ring: Choose one carbon atom in the cyclohexane ring as position 1, and number the ring sequentially in a clockwise or counterclockwise direction to ensure the substituents are at the lowest possible positions.

Add the substituents: Attach a methyl group (-CH₃) to the carbon atom labeled as position 1 and another methyl group to the carbon atom labeled as position 3.

Verify the structure: Ensure that the skeletal structure accurately represents 1,3-dimethylcyclohexane, with the correct placement of the methyl groups and the six-membered ring intact.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Skeletal Structures

Skeletal structures, or line-angle formulas, are simplified representations of organic molecules where carbon atoms are implied at the ends of lines and at intersections. Hydrogen atoms attached to carbons are usually omitted for clarity. This notation allows chemists to visualize the molecular framework quickly, focusing on the connectivity and arrangement of atoms rather than individual bonds.

Cycloalkanes

Cycloalkanes are a class of hydrocarbons characterized by carbon atoms arranged in a ring structure. They follow the general formula CnH2n, where 'n' is the number of carbon atoms. Cyclohexane, for example, consists of six carbon atoms in a ring, and its stability and reactivity can be influenced by substituents attached to the ring, such as methyl groups in the case of 1,3-dimethylcyclohexane.

Substituents and Isomerism

Substituents are atoms or groups of atoms that replace hydrogen atoms in a hydrocarbon. In 1,3-dimethylcyclohexane, two methyl groups are attached to the cyclohexane ring at the first and third carbon positions. The arrangement of these substituents can lead to different isomers, affecting the molecule's physical and chemical properties, such as boiling point and stability.

Watch next

Master How to find the root name for cycloalkanes with a bite sized video explanation from Johnny

Start learning