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Identify the peaks by labeling and circling them

Identify the peaks by labeling and circling 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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Identify the peaks by labeling and circling them.

**IR Spectrum of Benzaldehyde** This image displays the infrared (IR) spectrum of benzaldehyde. The spectrum is plotted on a graph with the x-axis representing the wavenumber in cm⁻¹, and the y-axis showing the percent transmittance (%T). ### Key Features of the Spectrum: 1. **Wavenumber Range:** - The spectrum spans from around 4000 cm⁻¹ to 600 cm⁻¹. 2. **Peaks and Troughs:** - The transmittance is measured as dips in the graph, indicating absorption by the benzaldehyde molecule at specific wavenumbers. - Notable absorption bands can be observed between: - 2850-3000 cm⁻¹, which is characteristic of C-H stretching vibrations in aldehydes. - 1700 cm⁻¹, signifying the C=O (carbonyl) stretching of benzaldehyde. - Below 1600 cm⁻¹, which may correspond to various bending vibrations and C=C bonds characteristic of aromatic compounds. 3. **Analysis:** - Each peak corresponds to a specific vibrational mode of the benzaldehyde molecule, providing insight into the molecular structure. This IR spectrum provides crucial information for identifying functional groups present in benzaldehyde and supports structural analysis in organic chemistry studies.
Transcribed Image Text:**IR Spectrum of Benzaldehyde** This image displays the infrared (IR) spectrum of benzaldehyde. The spectrum is plotted on a graph with the x-axis representing the wavenumber in cm⁻¹, and the y-axis showing the percent transmittance (%T). ### Key Features of the Spectrum: 1. **Wavenumber Range:** - The spectrum spans from around 4000 cm⁻¹ to 600 cm⁻¹. 2. **Peaks and Troughs:** - The transmittance is measured as dips in the graph, indicating absorption by the benzaldehyde molecule at specific wavenumbers. - Notable absorption bands can be observed between: - 2850-3000 cm⁻¹, which is characteristic of C-H stretching vibrations in aldehydes. - 1700 cm⁻¹, signifying the C=O (carbonyl) stretching of benzaldehyde. - Below 1600 cm⁻¹, which may correspond to various bending vibrations and C=C bonds characteristic of aromatic compounds. 3. **Analysis:** - Each peak corresponds to a specific vibrational mode of the benzaldehyde molecule, providing insight into the molecular structure. This IR spectrum provides crucial information for identifying functional groups present in benzaldehyde and supports structural analysis in organic chemistry studies.
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