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Identify peaks and annotate the IR of benzoic acid

Identify peaks and annotate the IR of benzoic acid

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 peaks and annotate the IR of benzoic acid
This image shows an infrared (IR) spectrum, which is a plot commonly used in the analysis of chemical compounds. It is produced using a Shimadzu instrument. **Graph Explanation:** - **X-Axis (cm⁻¹):** The horizontal axis represents the wavenumber, measured in inverse centimeters (cm⁻¹), which is typical for IR spectroscopy. This range goes from approximately 600 cm⁻¹ to 3400 cm⁻¹. - **Y-Axis:** The vertical axis depicts intensity, although it isn't numerically labeled on this graph. **Key Peaks:** - **3072.60 cm⁻¹:** Often associated with N-H or C-H stretching vibrations in organic compounds. - **2829.57 cm⁻¹:** Likely related to aldehyde C-H stretching. - **2605.83 cm⁻¹ and 2555.68 cm⁻¹:** Possible S-H or O-H stretching peaks in thiols or carboxylic acids. - **1716.65 cm⁻¹:** A significant peak, usually indicative of a C=O stretching vibration found in ketones, aldehydes, or carboxylic acids. - **1600.92 cm⁻¹ to 1216.44 cm⁻¹:** A series of peaks that can represent C=C stretching (aromatic rings), C-H bending, or N-H bending vibrations. - **1001.06 cm⁻¹:** Could correspond to C-O or C-N stretching or bending vibrations. **Instrument & Data Information:** - The spectrum was recorded using a Shimadzu IR spectrometer. - The date and time of the data collection are marked as 10/20/2023 at 3:14:41 PM and 3:32:49 PM. This spectrum provides valuable data for identifying functional groups within a molecule, useful for educational purposes in chemistry to understand molecular structures and compositions.
Transcribed Image Text:This image shows an infrared (IR) spectrum, which is a plot commonly used in the analysis of chemical compounds. It is produced using a Shimadzu instrument. **Graph Explanation:** - **X-Axis (cm⁻¹):** The horizontal axis represents the wavenumber, measured in inverse centimeters (cm⁻¹), which is typical for IR spectroscopy. This range goes from approximately 600 cm⁻¹ to 3400 cm⁻¹. - **Y-Axis:** The vertical axis depicts intensity, although it isn't numerically labeled on this graph. **Key Peaks:** - **3072.60 cm⁻¹:** Often associated with N-H or C-H stretching vibrations in organic compounds. - **2829.57 cm⁻¹:** Likely related to aldehyde C-H stretching. - **2605.83 cm⁻¹ and 2555.68 cm⁻¹:** Possible S-H or O-H stretching peaks in thiols or carboxylic acids. - **1716.65 cm⁻¹:** A significant peak, usually indicative of a C=O stretching vibration found in ketones, aldehydes, or carboxylic acids. - **1600.92 cm⁻¹ to 1216.44 cm⁻¹:** A series of peaks that can represent C=C stretching (aromatic rings), C-H bending, or N-H bending vibrations. - **1001.06 cm⁻¹:** Could correspond to C-O or C-N stretching or bending vibrations. **Instrument & Data Information:** - The spectrum was recorded using a Shimadzu IR spectrometer. - The date and time of the data collection are marked as 10/20/2023 at 3:14:41 PM and 3:32:49 PM. This spectrum provides valuable data for identifying functional groups within a molecule, useful for educational purposes in chemistry to understand molecular structures and compositions.
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