Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 19m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 18m
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 Acids3h 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

Previous problemNext problem

Multiple Choice

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

Ketone

Alkyne

Alkene

Alkyl Halide

Amine

Previous problemNext problem

Related Practice

Textbook Question

a. Which occurs at a larger wavenumber:

1. a C=C stretch or a C=C stretch?

2. a C-H stretch or a C-H bend?

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Textbook Question

Would you expect an acetylenic C―H to absorb at a higher or lower wavenumber than the C―H in ethene?

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Textbook Question

LOOKING AHEAD We explain in Chapter 23 that substituents can transmit electronic information through the benzene ring when appropriately positioned. Assessments 14.55–14.59 allow us to use IR spectroscopy to discover this concept and apply it to an example (Assessment 14.60) that we study there. (••) Would you expect the stretching band of the carbonyl to appear at a higher frequency for cyclohexanecarbaldehyde or benzaldehyde? Explain.

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Textbook Question

LOOKING AHEAD We explain in Chapter 23 that substituents can transmit electronic information through the benzene ring when appropriately positioned. Assessments 14.55–14.59 allow us to use IR spectroscopy to discover this concept and apply it to an example (Assessment 14.60) that we study there. (•••) Justify the carbonyl stretching frequencies for a series of methoxybenzaldehydes. Specifically, why are the 2- and 4-methoxy derivatives similar to each other but different from the 3-methoxy derivative?

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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.

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.

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.

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

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