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QUESTION 2 Which of the following structures is consistent with the IR spectra shown below? % Transmittance 60 40 20 1788 3500 3000 2500 2000 Wavenumbers (cm-1) 1500 1000 500

QUESTION 2 Which of the following structures is consistent with the IR spectra shown below? % Transmittance 60 40 20 1788 3500 3000 2500 2000 Wavenumbers (cm-1) 1500 1000 500

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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**Question 2** Which of the following structures is consistent with the IR spectra shown below? **Graph Description:** - **X-Axis:** Wavenumbers (cm⁻¹), ranging from 3500 to 500 cm⁻¹. - **Y-Axis:** % Transmittance, ranging from 0% to 100%. **Key Spectral Features:** - A strong, broad peak around 3300 cm⁻¹, indicating the presence of O-H or N-H stretching. - A sharp peak around 1700 cm⁻¹, characteristic of C=O stretching. - Various peaks between 1500-500 cm⁻¹, indicating fingerprint region features, often used to identify specific structural details. **Option Structures:** 1. Structure resembling an alcohol. 2. Structure indicating an ether. 3. Structure with a ketone group. 4. Cyclohexane-like structure. 5. Aromatic compound. **Conclusion:** To identify the correct structure, one must match the peaks of this IR spectrum to the functional groups typically seen in these options. The observed peaks suggest functional groups indicative of alcohols or ketones, depending on further details analyzed from the fingerprint region and peak shapes.
Transcribed Image Text:**Question 2** Which of the following structures is consistent with the IR spectra shown below? **Graph Description:** - **X-Axis:** Wavenumbers (cm⁻¹), ranging from 3500 to 500 cm⁻¹. - **Y-Axis:** % Transmittance, ranging from 0% to 100%. **Key Spectral Features:** - A strong, broad peak around 3300 cm⁻¹, indicating the presence of O-H or N-H stretching. - A sharp peak around 1700 cm⁻¹, characteristic of C=O stretching. - Various peaks between 1500-500 cm⁻¹, indicating fingerprint region features, often used to identify specific structural details. **Option Structures:** 1. Structure resembling an alcohol. 2. Structure indicating an ether. 3. Structure with a ketone group. 4. Cyclohexane-like structure. 5. Aromatic compound. **Conclusion:** To identify the correct structure, one must match the peaks of this IR spectrum to the functional groups typically seen in these options. The observed peaks suggest functional groups indicative of alcohols or ketones, depending on further details analyzed from the fingerprint region and peak shapes.
**QUESTION 1** The IR spectrum below reveals what functional group, if any? ![IR Spectrum Graph] The graph displayed is an Infrared (IR) spectrum with the following features: - The x-axis represents the wavenumber (cm⁻¹), ranging from approximately 4000 to 1500. - The y-axis shows transmittance (%), from 0 to 100. Key absorptions observed in the spectrum: - A broad peak around 3300 cm⁻¹, suggesting the presence of an O—H group. - A sharp peak near 1700 cm⁻¹, characteristic of a C=O group. **Options:** A. C=C B. O—H C. C=O D. none of these The correct answer appears to be related to choices B (O—H) due to the broad peak near 3300 cm⁻¹ and C (C=O) due to the sharp peak near 1700 cm⁻¹. *Note: Click Save and Submit to save and submit. Click Save All Answers to save all answers.*
Transcribed Image Text:**QUESTION 1** The IR spectrum below reveals what functional group, if any? ![IR Spectrum Graph] The graph displayed is an Infrared (IR) spectrum with the following features: - The x-axis represents the wavenumber (cm⁻¹), ranging from approximately 4000 to 1500. - The y-axis shows transmittance (%), from 0 to 100. Key absorptions observed in the spectrum: - A broad peak around 3300 cm⁻¹, suggesting the presence of an O—H group. - A sharp peak near 1700 cm⁻¹, characteristic of a C=O group. **Options:** A. C=C B. O—H C. C=O D. none of these The correct answer appears to be related to choices B (O—H) due to the broad peak near 3300 cm⁻¹ and C (C=O) due to the sharp peak near 1700 cm⁻¹. *Note: Click Save and Submit to save and submit. Click Save All Answers to save all answers.*
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