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

6:04 minutes

Problem 16a,b

Textbook Question

Draw the structure and give the molecular formula for each of the following compounds.
a. 1-ethyl-3-methylcycloheptane
b. isobutylcyclohexane

Verified step by step guidance

Step 1: Understand the naming conventions for organic compounds. The name '1-ethyl-3-methylcycloheptane' indicates a cycloheptane ring with an ethyl group attached to the first carbon and a methyl group attached to the third carbon. Similarly, 'isobutylcyclohexane' indicates a cyclohexane ring with an isobutyl group attached.

Step 2: Draw the base ring structure for each compound. For '1-ethyl-3-methylcycloheptane', draw a seven-membered ring (cycloheptane). For 'isobutylcyclohexane', draw a six-membered ring (cyclohexane).

Step 3: Add the substituents to the ring. For '1-ethyl-3-methylcycloheptane', add an ethyl group (CH₃CH₂-) to the first carbon and a methyl group (CH₃-) to the third carbon of the cycloheptane ring. For 'isobutylcyclohexane', add an isobutyl group ((CH₃)₂CHCH₂-) to one of the carbons in the cyclohexane ring.

Step 4: Count the total number of each type of atom in the structure to determine the molecular formula. For '1-ethyl-3-methylcycloheptane', count the carbons and hydrogens in the cycloheptane ring and the attached ethyl and methyl groups. For 'isobutylcyclohexane', count the carbons and hydrogens in the cyclohexane ring and the attached isobutyl group.

Step 5: Write the molecular formula for each compound based on the atom count. Ensure that the formula reflects the total number of carbon (C) and hydrogen (H) atoms present in the structure.

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.

IUPAC Nomenclature

IUPAC nomenclature is a standardized system for naming chemical compounds. It involves identifying the longest carbon chain, numbering the chain to give substituents the lowest possible numbers, and naming substituents as prefixes. Understanding this system is crucial for accurately drawing and naming organic compounds like 1-ethyl-3-methylcycloheptane and isobutylcyclohexane.

Cycloalkanes

Cycloalkanes are saturated hydrocarbons with carbon atoms arranged in a ring structure. They are named based on the number of carbon atoms in the ring, with 'cyclo-' as a prefix. Recognizing cycloalkane structures is essential for drawing compounds like cycloheptane and cyclohexane, which form the base of the given compounds.

Substituents and Branching

Substituents are groups attached to the main carbon chain or ring, altering the compound's structure and properties. Branching occurs when these groups, such as ethyl, methyl, or isobutyl, are attached to the main structure. Understanding how to identify and position these substituents is key to drawing the correct structure and determining the molecular formula.

Watch next

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

Start learning

Related Videos

Related Practice

Textbook Question

Label each hydrogen atom in the following compounds as primary (1°), secondary (2°), or tertiary (3°).

(e)

(f)

Textbook Question

Correct the following incorrect names using standard IUPAC nomenclature. [Draw a compound that corresponds to the incorrect name, and then rename it.]

(e) 2,6-diethyl-1-methylcycloheptane

Textbook Question

Each of the following descriptions applies to more than one alkane. In each case, draw and name two structures that match the description.

e. a (2,3-dimethylpentyl)cycloalkane

Textbook Question

(•••) Correct the following incorrect names using standard IUPAC nomenclature. [Draw a compound that corresponds to the incorrect name, and then rename it.](e) 2,6-diethyl-1-methylcycloheptane

Textbook Question

Draw the structure and give the molecular formula for each of the following compounds.

e. 3-ethyl-2,4-dimethylhexane

f. 1,1-diethyl-4-(3,3-dimethylbutyl)cyclohexane

Textbook Question

Draw the structure and give the molecular formula for each of the following compounds.