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How many signals would you expect each of the following molecules to have in its ¹H and 13C spectra? ¹H-NMR 13C-NMR Molecule #1 Submit Answer H CH3 CH3 okoo CH3 CH3 absorptions absorptions Molecule #2 Try Another Version Molecule #3 ✓absorptions absorptions ✓absorptions ✓absorptions 4 item attempts remaining

How many signals would you expect each of the following molecules to have in its ¹H and 13C spectra? ¹H-NMR 13C-NMR Molecule #1 Submit Answer H CH3 CH3 okoo CH3 CH3 absorptions absorptions Molecule #2 Try Another Version Molecule #3 ✓absorptions absorptions ✓absorptions ✓absorptions 4 item attempts remaining

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Title: Analyzing NMR Signals for Organic Molecules** **Introduction:** In this analysis, we will determine the expected number of NMR (Nuclear Magnetic Resonance) signals for three organic molecules in both their \( ^1H \) and \( ^{13}C \) spectra. **Molecule Representations:** 1. **Molecule #1:** - Structure: An aromatic benzene ring attached to a propyl group with two methyl groups on the same carbon (isopropyl group). 2. **Molecule #2:** - Structure: A benzene ring with two methyl groups para to each other. 3. **Molecule #3:** - Structure: A fused polycyclic aromatic hydrocarbon with three benzene rings in a linear arrangement (anthracene). **NMR Signal Analysis:** - **\( ^1H-NMR \) Signals:** - Molecule #1: Dropdown options for determining the number of proton absorptions. - Molecule #2: Dropdown options for determining the number of proton absorptions. - Molecule #3: Dropdown options for determining the number of proton absorptions. - **\( ^{13}C-NMR \) Signals:** - Molecule #1: Dropdown options for determining the number of carbon absorptions. - Molecule #2: Dropdown options for determining the number of carbon absorptions. - Molecule #3: Dropdown options for determining the number of carbon absorptions. **Interactive Components:** - **Submit Answer:** Button to submit the selected numbers of absorptions. - **Try Another Version:** Option to attempt a different set of molecules or questions. - **Attempts Remaining:** Indicator showing four attempts remaining. **Conclusion:** This exercise is designed to enhance the understanding of symmetry and unique environments within molecular structures, which influence the NMR spectrum. Students will need to apply their knowledge of chemical environments to predict the correct number of unique hydrogen and carbon signals for each molecule.
Transcribed Image Text:**Title: Analyzing NMR Signals for Organic Molecules** **Introduction:** In this analysis, we will determine the expected number of NMR (Nuclear Magnetic Resonance) signals for three organic molecules in both their \( ^1H \) and \( ^{13}C \) spectra. **Molecule Representations:** 1. **Molecule #1:** - Structure: An aromatic benzene ring attached to a propyl group with two methyl groups on the same carbon (isopropyl group). 2. **Molecule #2:** - Structure: A benzene ring with two methyl groups para to each other. 3. **Molecule #3:** - Structure: A fused polycyclic aromatic hydrocarbon with three benzene rings in a linear arrangement (anthracene). **NMR Signal Analysis:** - **\( ^1H-NMR \) Signals:** - Molecule #1: Dropdown options for determining the number of proton absorptions. - Molecule #2: Dropdown options for determining the number of proton absorptions. - Molecule #3: Dropdown options for determining the number of proton absorptions. - **\( ^{13}C-NMR \) Signals:** - Molecule #1: Dropdown options for determining the number of carbon absorptions. - Molecule #2: Dropdown options for determining the number of carbon absorptions. - Molecule #3: Dropdown options for determining the number of carbon absorptions. **Interactive Components:** - **Submit Answer:** Button to submit the selected numbers of absorptions. - **Try Another Version:** Option to attempt a different set of molecules or questions. - **Attempts Remaining:** Indicator showing four attempts remaining. **Conclusion:** This exercise is designed to enhance the understanding of symmetry and unique environments within molecular structures, which influence the NMR spectrum. Students will need to apply their knowledge of chemical environments to predict the correct number of unique hydrogen and carbon signals for each molecule.
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