Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

17. Amines

Classifying Amines

GOB Chemistry

17. Amines

Classifying Amines

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Problem 11

Textbook Question

Which of the following compounds are heterocyclic nitrogen compounds?
a.
b.
c.
d.

Verified step by step guidance

Identify the definition of a heterocyclic nitrogen compound: A heterocyclic compound contains a ring structure with at least one atom in the ring being a nitrogen atom, and the rest of the atoms in the ring can be carbon or other elements.

Examine the structure of each compound provided in the images. Look for a ring structure and determine if nitrogen is one of the atoms in the ring.

For each compound, confirm whether the nitrogen atom is part of the ring (not just attached to the ring as a substituent). This is a key criterion for being a heterocyclic nitrogen compound.

Check if the ring structure is closed and stable, as heterocyclic compounds must have a complete ring system.

Classify each compound based on the above criteria and determine which ones meet the definition of heterocyclic nitrogen compounds.

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Key Concepts

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

Heterocyclic Compounds

Heterocyclic compounds are cyclic structures that contain at least one atom in the ring that is not carbon, typically nitrogen, oxygen, or sulfur. These compounds are significant in various fields, including pharmaceuticals and biochemistry, due to their diverse chemical properties and biological activities.

Nitrogen in Heterocycles

Nitrogen is a common heteroatom in heterocyclic compounds, influencing their reactivity and stability. The presence of nitrogen can affect the electronic properties of the compound, making them essential in the design of drugs and agrochemicals, as they often participate in hydrogen bonding and coordination with metal ions.

Identification of Heterocycles

Identifying heterocyclic nitrogen compounds involves recognizing the structural features that define them, such as the presence of a nitrogen atom within a ring. Familiarity with common heterocycles, like pyridine and imidazole, can aid in distinguishing these compounds from non-heterocyclic ones in chemical structures.

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Textbook Question

Classify each of the following amines as primary (1°), secondary (2°), or tertiary (3°):

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Textbook Question

Draw the condensed and line formula of the molecule in the margin. Is it a primary, secondary, or tertiary amine? Why?

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Textbook Question

Which is the stronger base, trimethylamine or ammonia? In which direction will the following reaction proceed?

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Textbook Question

Draw the structure of the following amino acids, dipeptides, and tripeptides at low pH (pH 1) and high pH (pH 14). At each pH, assume that all functional groups that might do so are ionized.

e. Gln-Ala-Asn

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Textbook Question

Draw the structures of (a) ethylamine and (b) trimethylamine. Use dashed lines to show how they would form hydrogen bonds to water molecules.

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Textbook Question

Which is the stronger base in each pair?

a. Ammonia or ethylamine

b.Triethylamine or pyridine

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Textbook Question