5. Determine the structure of a compound with a molecular formula of C4H3O2 with the 13C and 'H NMR spectra below. No peaks exchange with D2O on the 'H NMR spectrum.

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Chapter1: Chemical Foundations
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The image presents the task of determining the structure of a compound with the molecular formula C₄H₈O₂ utilizing the provided ¹³C and ¹H NMR spectra. It specifies that there are no peaks exchanging with D₂O on the ¹H NMR spectrum.

### 13C NMR Spectrum Analysis:
- The ¹³C NMR spectrum displays several peaks, each representing a unique carbon environment within the compound.
- Peaks are visible at different chemical shifts, typically measured in ppm (parts per million).

### 1H NMR Spectrum Analysis:
- The ¹H NMR spectrum shows multiple distinct sets of peaks, indicative of different hydrogen environments.
- There is a peak with an integration of I=2 near the chemical shift of approximately 4.0 ppm, suggesting two equivalent hydrogens.
- Two peaks with integrations of I=3 each are observed around 1.2 ppm and near 1.0 ppm, indicating three equivalent hydrogens in each environment.
- The integration values of I=2 and I=3 help identify the number of hydrogens contributing to each signal.
- The splitting patterns and integration values provide insights into the connectivity and arrangement of atoms within the molecule.

This information can be used to deduce possible structural frameworks, keeping in mind that no peaks are interacting with D₂O, which rules out exchangeable protons (such as -OH or -NH).
Transcribed Image Text:The image presents the task of determining the structure of a compound with the molecular formula C₄H₈O₂ utilizing the provided ¹³C and ¹H NMR spectra. It specifies that there are no peaks exchanging with D₂O on the ¹H NMR spectrum. ### 13C NMR Spectrum Analysis: - The ¹³C NMR spectrum displays several peaks, each representing a unique carbon environment within the compound. - Peaks are visible at different chemical shifts, typically measured in ppm (parts per million). ### 1H NMR Spectrum Analysis: - The ¹H NMR spectrum shows multiple distinct sets of peaks, indicative of different hydrogen environments. - There is a peak with an integration of I=2 near the chemical shift of approximately 4.0 ppm, suggesting two equivalent hydrogens. - Two peaks with integrations of I=3 each are observed around 1.2 ppm and near 1.0 ppm, indicating three equivalent hydrogens in each environment. - The integration values of I=2 and I=3 help identify the number of hydrogens contributing to each signal. - The splitting patterns and integration values provide insights into the connectivity and arrangement of atoms within the molecule. This information can be used to deduce possible structural frameworks, keeping in mind that no peaks are interacting with D₂O, which rules out exchangeable protons (such as -OH or -NH).
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