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

15. Analytical Techniques:IR, NMR, Mass Spect

IR Spect:Extra Practice

Organic Chemistry

15. Analytical Techniques:IR, NMR, Mass Spect

IR Spect:Extra Practice

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Multiple Choice

Match the following functional group choices with the supplied infrared spectra data

Ether

Ketone

Alcohol

Alkene

Nitrile

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Verified step by step guidance

Examine the infrared spectrum for characteristic peaks. The broad peak around 3300 cm^-1 is indicative of an O-H stretch, which is a hallmark of alcohols.

Identify the absence of a sharp peak around 1700 cm^-1, which would indicate a C=O stretch typical of ketones. This absence suggests the compound is not a ketone.

Look for the absence of a peak around 2250 cm^-1, which would indicate a C≡N stretch typical of nitriles. This absence suggests the compound is not a nitrile.

Note the absence of a peak around 1640-1680 cm^-1, which would indicate a C=C stretch typical of alkenes. This absence suggests the compound is not an alkene.

Consider the absence of a peak around 1050-1150 cm^-1, which would indicate a C-O-C stretch typical of ethers. This absence suggests the compound is not an ether.

Related Practice

Textbook Question

The IR spectrum of compound A with a molecular formula of C₅H₁₂O is shown below. Compound A is oxidized to give compound B, a ketone with a molecular formula of C₅H₁₀O. When compound A is heated with H2SO4, compounds C and D are obtained. Considerably more D is obtained than C. Reaction of compound C with O₃, followed by treatment with dimethyl sulfide, gives two products: formaldehyde and compound E, with a molecular formula of C₄H₈O. Reaction of compound D with O₃, followed by treatment with dimethyl sulfide, gives two products: compound F, with a molecular formula of C₃H₆O, and compound G, with a molecular formula of C₂H₄O. What are the structures of compounds A through G?

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Open Question

Based on IR data given determine the structure of the unknown. Unknown compound A has molecular formula C₄H₁₁N. It shows a peak at 2900 cm^-1 and peaks in the fingerprint region.

Open Question

Based on IR data given determine the structure of the unknown. Unknown compound B has molecular formula C₄H₁₁N. It shows a single peak at approximately 3400 cm^-1 as well as peaks at 2900 cm^-1 and in the fingerprint region. Compound B also possesses a branched alkyl group.

Open Question

Based on IR data given determine the structure of the unknown. Unknown compound C has molecular formula C₆H₁₀O₃. It shows peaks at 2900, 1850 , 1740 cm^-1 and in the fingerprint region.

Multiple Choice

Match the following functional group choices with the supplied infrared spectra data

Multiple Choice

Match the following functional group choices with the supplied infrared spectra data.

Multiple Choice

Match the following functional group choices with the supplied infrared spectra data.

Multiple Choice

What are the characteristic bands in an IR spectrum corresponding to a carboxylic acid?

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