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

22. Carboxylic Acid Derivatives: NAS

Carboxylic Acid Derivatives

Organic Chemistry

22. Carboxylic Acid Derivatives: NAS

Carboxylic Acid Derivatives

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Multiple Choice

Which of the following is NOT a carboxylic acid derivative?

The figure illustrates the structure of a molecule. A 2-carbon alkane chain is depicted as a line structure using 1 line. C 2 is single bonded on the upper right to C, triple bond, N.

The figure illustrates the structure of a molecule. A benzene ring is in a vertical orientation with C 1 occupying the topmost vertex. The ring contains alternating double bonds between C 1 and C 2, C 3 and C 4, and C 5 and C 6. C 2 is single bonded to C 1 of a 1 O and 4 C heteronuclear alkane chain depicted as a line structure using 4 zigzag lines. O occupies the second position. C 1 and C 2 of the alkane chain are each double bonded to O above. C 3 of the alkane chain is single bonded to C H 3 below and C H 3 on the lower right, each in the form of a line.

The figure illustrates the structure of a molecule. A 4-carbon alkane chain is depicted as a line structure using 3 zigzag lines. C 2 is single bonded above to C 2 of a 2-carbon alkane chain depicted as a line structure using 1 line. C 4 is double bonded to O above and single bonded to C l on the lower right.

The figure illustrates the structure of a molecule. A 5-carbon pentagonal ring is in a vertical orientation with C 1 occupying the topmost vertex. C 1 is double bonded to O. C 2 is single bonded to O of a 1 O and 2 C heteronuclear alkane chain depicted as a line structure using 2 zigzag lines. O occupies the first position.

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Identify the functional group in each structure. The first image shows a nitrile group (C≡N), the second image shows an anhydride, the third image shows an acyl chloride, and the fourth image shows an ester.

Recall the definition of carboxylic acid derivatives. These are compounds that can be derived from carboxylic acids by replacing the hydroxyl group (-OH) with another group. Common derivatives include esters, anhydrides, acyl chlorides, and amides.

Analyze the first structure with the nitrile group. Nitriles are not typically considered carboxylic acid derivatives because they do not contain the carbonyl group (C=O) characteristic of carboxylic acids and their derivatives.

Examine the other structures: the second structure is an anhydride, the third is an acyl chloride, and the fourth is an ester. All of these contain the carbonyl group and are recognized as carboxylic acid derivatives.

Conclude that the structure with the nitrile group is the one that is NOT a carboxylic acid derivative, as it lacks the carbonyl group and does not fit the typical transformation from a carboxylic acid.