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:Drawing Spectra

Organic Chemistry

15. Analytical Techniques:IR, NMR, Mass Spect

IR Spect:Drawing Spectra

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4:01 minutes

Problem 13aBruice - 8th Edition

Textbook Question

Which one of the following five compounds produced the IR spectrum shown below?

Verified step by step guidance

Identify the major peaks in the IR spectrum provided. Look for key functional group absorptions such as O-H, N-H, C=O, C=C, and C-H stretches.

Compare the identified peaks to typical absorption ranges for different functional groups. For example, O-H stretches usually appear around 3200-3600 cm^-1, C=O stretches around 1700-1750 cm^-1, and C-H stretches in the range of 2850-3000 cm^-1.

Examine the structure of each of the five given compounds. Note the functional groups present in each compound and their expected IR absorptions.

Match the functional groups in each compound with the corresponding peaks observed in the IR spectrum. Consider both the presence and intensity of the peaks.

Eliminate compounds whose functional group absorptions do not align with the significant peaks in the IR spectrum, and identify the compound that best fits the observed data.

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Key Concepts

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

Infrared Spectroscopy (IR)

Infrared spectroscopy is a technique used to identify functional groups in organic compounds by measuring the absorption of infrared light. Different bonds absorb specific wavelengths of IR radiation, resulting in a spectrum that provides information about the molecular structure. Peaks in the IR spectrum correspond to the vibrational transitions of bonds, allowing chemists to deduce the presence of certain functional groups.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Common functional groups include hydroxyl (-OH), carbonyl (C=O), and carboxyl (-COOH). Identifying these groups in a compound is crucial for predicting its reactivity and properties, and they are often indicated by distinct peaks in an IR spectrum.

Molecular Structure Interpretation

Interpreting molecular structure involves analyzing the connectivity and arrangement of atoms within a molecule. This includes understanding how different functional groups influence the overall shape and reactivity of the compound. In the context of IR spectroscopy, interpreting the spectrum helps in deducing the molecular structure by correlating observed peaks with specific functional groups and their expected vibrational modes.