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 Amines

Organic Chemistry

4. Alkanes and Cycloalkanes

Naming Amines

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5:32 minutes

Problem 29b

Textbook Question

Draw condensed and skeletal structures for each of the following amines:
b. N-ethylethanamine

Verified step by step guidance

Step 1: Understand the name of the compound 'N-ethylethanamine'. The prefix 'N-ethyl' indicates that an ethyl group (-CH₂CH₃) is attached to the nitrogen atom. The base name 'ethanamine' refers to a two-carbon chain (ethane) with an amine group (-NH₂) attached.

Step 2: Begin by drawing the condensed structure. Start with the ethane backbone (CH₃CH₂) and attach the amine group (-NH₂) to the first carbon. Then, attach the ethyl group (-CH₂CH₃) directly to the nitrogen atom.

Step 3: Write the condensed structure using chemical notation. The condensed structure for N-ethylethanamine is CH₃CH₂NHCH₂CH₃. This notation shows the ethyl group bonded to the nitrogen and the ethanamine backbone.

Step 4: Draw the skeletal structure. In skeletal structures, carbon atoms are represented as vertices, and hydrogen atoms bonded to carbons are implied. Draw a two-carbon chain for ethanamine, with a nitrogen atom bonded to the first carbon. Then, attach another two-carbon chain (ethyl group) to the nitrogen atom.

Step 5: Verify the skeletal structure. Ensure that the nitrogen atom has three bonds (one to the ethyl group and two to the ethanamine backbone) and that all implied hydrogens are correctly accounted for. This completes the skeletal representation of N-ethylethanamine.

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Key Concepts

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

Amines

Amines are organic compounds derived from ammonia (NH3) by replacing one or more hydrogen atoms with alkyl or aryl groups. They can be classified as primary, secondary, or tertiary based on the number of carbon-containing groups attached to the nitrogen atom. Understanding the structure and classification of amines is essential for drawing their condensed and skeletal forms.

Condensed Structures

Condensed structures provide a simplified representation of a molecule, showing the connectivity of atoms without depicting all the bonds explicitly. In the case of amines, the condensed structure typically lists the carbon chains and functional groups in a linear format, which helps in visualizing the molecular composition and functional groups present in the compound.

Skeletal Structures

Skeletal structures, or line-angle formulas, are a shorthand way of representing organic molecules where carbon atoms are represented by vertices and hydrogen atoms are implied. This method emphasizes the connectivity of the molecule while omitting hydrogen atoms attached to carbons, making it easier to visualize larger organic compounds like amines without clutter.

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Related Practice

Textbook Question

Draw the condensed structure for each of the following:

d. vinyl bromide

e. 1,2-dimethylcyclopentene

f. diallylamine

Textbook Question

A student was given the structural formulas of several compounds and was asked to give them systematic names. How many did the student name correctly? Correct those that are misnamed.

l. 2-methyl-N,N-dimethyl-4-hexanamine

Multiple Choice

Which is NOT an acceptable name for the following molecule?

Multiple Choice

Which of the following is a secondary amine?

Textbook Question

What is each compound's systematic name?

Textbook Question

Give a systematic name and a common name (if it has one) for each of the following amines and indicate whether each is a primary, secondary, or tertiary amine:

Textbook Question

Give a systematic name and a common name (if it has one) for each of the following amines and indicate whether each is a primary, secondary, or tertiary amine:

Textbook Question

For each of the following, give the systematic name and the common name (if it has one) and then indicate whether it is a primary, secondary, or tertiary amine:

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Draw condensed and skeletal structures for each of the following amines: b. N-ethylethanamine

Key Concepts

Amines

Condensed Structures

Skeletal Structures

Watch next

Draw condensed and skeletal structures for each of the following amines:
b. N-ethylethanamine