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Locate the following peaks by circling and labeling them

Locate the following peaks by circling and labeling them

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Locate the following peaks by circling and labeling them.

**IR Spectrum of Benzoic Acid** The image displays the infrared (IR) spectrum of benzoic acid. The horizontal axis represents the wavenumbers measured in centimeters inverse (cm⁻¹), ranging from 4000 to 600 cm⁻¹. The vertical axis indicates the percentage transmittance (%T), ranging from 0 to 100%. ### Key Features of the Spectrum: 1. **Broad Peak at 3300 cm⁻¹:** - This corresponds to the O-H stretching vibration found in carboxylic acids, indicating the presence of the hydroxyl group. 2. **Sharp Peak at 1700 cm⁻¹:** - This peak is characteristic of the C=O stretching vibration, confirming the presence of a carbonyl group in the acid. 3. **Additional Peaks between 1600 and 1400 cm⁻¹:** - These are associated with the C=C stretching vibrations in the aromatic ring of benzoic acid. 4. **Peaks between 1300 and 900 cm⁻¹:** - These are typically attributed to C-H bending vibrations and other deformations within the aromatic structure. Overall, the IR spectrum provides a fingerprint identifying benzoic acid by highlighting the unique vibrations corresponding to its functional groups and molecular structure.
Transcribed Image Text:**IR Spectrum of Benzoic Acid** The image displays the infrared (IR) spectrum of benzoic acid. The horizontal axis represents the wavenumbers measured in centimeters inverse (cm⁻¹), ranging from 4000 to 600 cm⁻¹. The vertical axis indicates the percentage transmittance (%T), ranging from 0 to 100%. ### Key Features of the Spectrum: 1. **Broad Peak at 3300 cm⁻¹:** - This corresponds to the O-H stretching vibration found in carboxylic acids, indicating the presence of the hydroxyl group. 2. **Sharp Peak at 1700 cm⁻¹:** - This peak is characteristic of the C=O stretching vibration, confirming the presence of a carbonyl group in the acid. 3. **Additional Peaks between 1600 and 1400 cm⁻¹:** - These are associated with the C=C stretching vibrations in the aromatic ring of benzoic acid. 4. **Peaks between 1300 and 900 cm⁻¹:** - These are typically attributed to C-H bending vibrations and other deformations within the aromatic structure. Overall, the IR spectrum provides a fingerprint identifying benzoic acid by highlighting the unique vibrations corresponding to its functional groups and molecular structure.
**Benzoic Acid** - OH stretch - CH stretch - Benzene C=C stretch - C-O stretch - C=O stretch This text outlines the characteristic stretches observed in the infrared (IR) spectroscopy of benzoic acid, highlighting the functional groups and bond types: - The OH stretch indicates the presence of hydroxyl groups. - The CH stretch corresponds to carbon-hydrogen bonds. - The Benzene C=C stretch refers to the carbon-carbon double bonds within the benzene ring. - The C-O stretch is associated with carbon-oxygen single bonds. - The C=O stretch is indicative of carbonyl groups present in the acid.
Transcribed Image Text:**Benzoic Acid** - OH stretch - CH stretch - Benzene C=C stretch - C-O stretch - C=O stretch This text outlines the characteristic stretches observed in the infrared (IR) spectroscopy of benzoic acid, highlighting the functional groups and bond types: - The OH stretch indicates the presence of hydroxyl groups. - The CH stretch corresponds to carbon-hydrogen bonds. - The Benzene C=C stretch refers to the carbon-carbon double bonds within the benzene ring. - The C-O stretch is associated with carbon-oxygen single bonds. - The C=O stretch is indicative of carbonyl groups present in the acid.
Expert Solution
Step 1: Define infrared spectrum and write its applications

The infrared spectrum is a plot of percentage transmittance versus stretching frequency. The interpretation of the infrared spectrum gives information about the different functional groups present in an organic molecule.

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