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:Drawing Spectra

Organic Chemistry

15. Analytical Techniques:IR, NMR, Mass Spect

IR Spect:Drawing Spectra

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Problem 22d

Textbook Question

Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.]
(d) <IMAGE>

Verified step by step guidance

Begin by understanding the basic principles of IR spectroscopy. Infrared (IR) spectroscopy is a technique used to identify functional groups in organic compounds based on the absorption of infrared light at specific wavelengths.

Examine the IR spectra provided. Look for key absorption peaks that correspond to specific functional groups. Common peaks include: O-H stretch (around 3200-3600 cm^-1), C=O stretch (around 1700 cm^-1), C-H stretch (around 2800-3000 cm^-1), and N-H stretch (around 3300-3500 cm^-1).

Identify the functional groups present in each of the given compounds. For example, if a compound contains a carbonyl group, you should expect a peak around 1700 cm^-1 in its IR spectrum.

Match the observed peaks in each IR spectrum to the functional groups identified in the compounds. This involves comparing the characteristic absorption frequencies of the functional groups in the compounds to the peaks in the spectra.

Determine which compound does not match any of the IR spectra. This compound will have functional groups that do not correspond to the peaks observed in any of the spectra provided.

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Key Concepts

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

Infrared Spectroscopy

Infrared spectroscopy is a technique used to identify functional groups in organic compounds by measuring the absorption of infrared light. Different bonds absorb specific frequencies, creating a spectrum that acts as a molecular fingerprint. Understanding IR spectra involves recognizing characteristic peaks corresponding to various functional groups.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In IR spectroscopy, each functional group has a unique absorption pattern, allowing chemists to identify them based on the presence and position of peaks in the spectrum.

Spectral Analysis

Spectral analysis involves interpreting the peaks and patterns in an IR spectrum to deduce the structure of a compound. This requires knowledge of typical absorption ranges for different functional groups and the ability to match these with the spectra provided. It is crucial to compare the spectra with known reference data to accurately identify the compound.

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Related Practice

Textbook Question

Each of the IR spectra shown below is accompanied by a set of four compounds. In each case, indicate which of the four compounds is responsible for the spectrum.

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Textbook Question

Five compounds are shown for each of the IR spectra below. Indicate which of the five compounds is responsible for each spectrum.

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Textbook Question

Each of the IR spectra shown below is the spectrum of one of the following compounds. Identify the compound that produced each spectrum.

a. <IMAGE>

Textbook Question

Each of the IR spectra shown below is the spectrum of one of the following compounds. Identify the compound that produced each spectrum.

b. <IMAGE>

Textbook Question

Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.]

Textbook Question

What functional groups might be present in the IR spectra for the molecules with the given molecular formulas. [Be sure to use the molecular formula in your analysis.]

(b) C₃H₄O₄

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Textbook Question

Given the IR spectrum, suggest what functional groups might correspond to the given molecular formula.

(d) C₇H₅O

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Textbook Question

Hoping to make the following diene, a chemist treated the diol shown with acid. Based on the IR spectrum, was the reaction successful? If not, what compound was made instead?

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Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.] (d) <IMAGE>

Key Concepts

Infrared Spectroscopy

Functional Groups

Spectral Analysis

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Match each of the four IR spectra to one of the given compounds. [One of the compounds does not match a spectrum.]
(d) <IMAGE>