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

Previous problemNext problem

Problem 13b

Textbook Question

Given the IR spectrum, suggest what functional groups might correspond to the given molecular formula.
(b) C₃H₇NO
<IMAGE>

Verified step by step guidance

Examine the IR spectrum for key absorption bands. Look for peaks in the regions corresponding to functional groups. For example, broad peaks around 3200-3600 cm⁻¹ often indicate O-H or N-H stretching, while sharp peaks near 1700 cm⁻¹ suggest C=O stretching.

Identify the molecular formula C3H7NO. This formula suggests the presence of carbon, hydrogen, nitrogen, and oxygen. Possible functional groups include amides, amines, alcohols, or ketones.

Analyze the broad peak around 3200-3500 cm⁻¹ in the IR spectrum. This could correspond to N-H stretching, indicating the presence of an amine or amide group.

Look for a sharp peak near 1650-1750 cm⁻¹. This region typically corresponds to C=O stretching, which is characteristic of carbonyl groups such as those found in amides or ketones.

Consider the absence of peaks around 2500-3000 cm⁻¹, which would indicate O-H stretching from carboxylic acids. Based on the molecular formula and IR data, the functional groups are likely an amide (C=O and N-H) or an amine (N-H).

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Play a video:

Was this helpful?

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 at different wavelengths. Each functional group absorbs IR radiation at characteristic frequencies, allowing chemists to deduce the presence of specific groups based on the peaks observed in the spectrum.

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 alcohols, amines, and carbonyls, each with distinct IR absorption patterns that can be identified in a spectrum, aiding in the structural analysis of organic compounds.

Molecular Formula Interpretation

The molecular formula provides information about the number and types of atoms in a compound, which is essential for predicting its structure and potential functional groups. For the formula C3H7NO, the presence of nitrogen and oxygen suggests possible functional groups such as amines or alcohols, which can be confirmed through analysis of the IR spectrum.

Watch next

Master Drawing Hydrocarbons with a bite sized video explanation from Johnny

Start learning

Related Videos

Related Practice

Textbook Question

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

(d) C₇H₅O

<IMAGE>

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?

<IMAGE>

Textbook Question

What functional groups are present in a molecule with a molecular formula of C₄H₁₀O and the following IR spectrum? [Use Table 14.2 for this.]

<IMAGE>

Textbook Question

On a day in which the laboratory air conditioning stopped working, a chemist hypothesized that the atmosphere would provide enough ambient heat to drive the nitrile hydrolysis reaction to the carboxylic acid. Based on the IR of the resulting product, was this hypothesis correct?

<IMAGE>

Textbook Question

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

<IMAGE>

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.

<IMAGE>

Textbook Question

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

<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.

a. <IMAGE>

Show more practices

Download the Mobile app

Privacy

Do not sell my personal information

Accessibility

Patent notice

Sitemap

Given the IR spectrum, suggest what functional groups might correspond to the given molecular formula.(b) C3H7NO<IMAGE>

Key Concepts

Infrared Spectroscopy (IR)

Functional Groups

Molecular Formula Interpretation

Watch next

Given the IR spectrum, suggest what functional groups might correspond to the given molecular formula.
(b) C₃H₇NO
<IMAGE>