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 11

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>

Verified step by step guidance

Begin by analyzing the molecular formula C₄H₁₀O. This formula suggests the presence of an oxygen atom, which is often indicative of functional groups such as alcohols, ethers, or carbonyls.

Examine the IR spectrum provided. Infrared spectroscopy is a powerful tool for identifying functional groups based on characteristic absorption bands. Look for key peaks that correspond to specific functional groups.

Identify the O-H stretch, which typically appears around 3200-3600 cm⁻¹ in the IR spectrum. This peak is indicative of an alcohol functional group.

Check for the C-O stretch, which usually appears around 1050-1150 cm⁻¹. This peak can be associated with both alcohols and ethers, so consider the presence of other peaks to differentiate between these possibilities.

Consider the absence of peaks around 1700 cm⁻¹, which would indicate a carbonyl group (such as aldehydes or ketones). The lack of such peaks suggests that the molecule does not contain these functional groups.

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.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In organic chemistry, identifying functional groups helps predict the behavior and reactivity of the compound. Common examples include alcohols, ethers, and carbonyls.

Infrared (IR) Spectroscopy

IR spectroscopy is a technique used to identify functional groups in a molecule by measuring the absorption of infrared light. Different functional groups absorb IR radiation at characteristic frequencies, producing peaks in the IR spectrum. Analyzing these peaks allows chemists to deduce the presence of specific functional groups.

Molecular Formula Analysis

The molecular formula provides the number and type of atoms in a molecule, which is crucial for deducing possible structures. For C₄H₁₀O, the formula suggests the presence of an oxygen-containing functional group, such as an alcohol or ether, given the saturation level indicated by the hydrogen count.

Watch next

Master Drawing Hydrocarbons with a bite sized video explanation from Johnny

Start learning

Related Videos

Related Practice

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

<IMAGE>

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

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

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

(b) C₃H₇NO

<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>

Show more practices

Download the Mobile app

Privacy

Do not sell my personal information

Accessibility

Patent notice

Sitemap

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>

Key Concepts

Functional Groups

Infrared (IR) Spectroscopy

Molecular Formula Analysis

Watch next

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>