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Match the peaks in this spectrum with hydrogens on the structure below.

Match the peaks in this spectrum with hydrogens on the structure below.

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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Match the peaks in this spectrum with hydrogens on the structure below.

### Proton NMR Spectrum Analysis **Graph Explanation** The image depicts a Proton Nuclear Magnetic Resonance (NMR) spectrum of a compound. Proton NMR is a powerful tool used to determine the structure of organic compounds by analyzing the hydrogen atom environments in a molecule. - **Chemical Shifts (ppm):** - The x-axis represents the chemical shift in parts per million (ppm), a measurement that indicates the environment of hydrogen atoms in the compound. - The spectrum ranges from 3.0 ppm to 0.0 ppm. - **Peak Analysis:** - The spectrum includes three main sets of peaks. - A large peak is observed around ~2.2 ppm, indicating a hydrogen environment close to an electronegative atom, such as oxygen in a carbonyl group. **Molecular Structure Inset** - In the inset, a molecular structure is shown with labeled hydrogen environments: - **I:** Represents the methyl group \( \text{H}_3\text{C}- \) directly connected to a carbon adjacent to an oxygen in a carbonyl group. - **II:** Represents the two hydrogen atoms \( \text{CH}_2 \), one carbon away from the carbonyl group. - **III:** Represents the central methylene hydrogens. - **IV:** Represents the terminal methyl group \( -\text{C}\text{H}_3 \), three carbons away from the carbonyl group. **Educational Context** - Students can use this spectrum to identify distinct hydrogen environments and relate them to specific structural features of the molecule. - The heights and splitting patterns (multiplicities) of the peaks provide additional clues about the neighboring hydrogen atoms and the number of hydrogen atoms in each environment.
Transcribed Image Text:### Proton NMR Spectrum Analysis **Graph Explanation** The image depicts a Proton Nuclear Magnetic Resonance (NMR) spectrum of a compound. Proton NMR is a powerful tool used to determine the structure of organic compounds by analyzing the hydrogen atom environments in a molecule. - **Chemical Shifts (ppm):** - The x-axis represents the chemical shift in parts per million (ppm), a measurement that indicates the environment of hydrogen atoms in the compound. - The spectrum ranges from 3.0 ppm to 0.0 ppm. - **Peak Analysis:** - The spectrum includes three main sets of peaks. - A large peak is observed around ~2.2 ppm, indicating a hydrogen environment close to an electronegative atom, such as oxygen in a carbonyl group. **Molecular Structure Inset** - In the inset, a molecular structure is shown with labeled hydrogen environments: - **I:** Represents the methyl group \( \text{H}_3\text{C}- \) directly connected to a carbon adjacent to an oxygen in a carbonyl group. - **II:** Represents the two hydrogen atoms \( \text{CH}_2 \), one carbon away from the carbonyl group. - **III:** Represents the central methylene hydrogens. - **IV:** Represents the terminal methyl group \( -\text{C}\text{H}_3 \), three carbons away from the carbonyl group. **Educational Context** - Students can use this spectrum to identify distinct hydrogen environments and relate them to specific structural features of the molecule. - The heights and splitting patterns (multiplicities) of the peaks provide additional clues about the neighboring hydrogen atoms and the number of hydrogen atoms in each environment.
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