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An unknown compound has the mass spectrum shown here. Its 13C NMR spectrum has four signs and its IR spectrum has an intense peak near 1720 cm-1. Propose a structure for this compound. 100- 80- 60어 m/z = 152, 40- m/z = 150, 20- 40 80 120 160 m/z

An unknown compound has the mass spectrum shown here. Its 13C NMR spectrum has four signs and its IR spectrum has an intense peak near 1720 cm-1. Propose a structure for this compound. 100- 80- 60어 m/z = 152, 40- m/z = 150, 20- 40 80 120 160 m/z

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Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Mass Spectrometry Analysis of an Unknown Compound** An unknown compound has been analyzed using mass spectrometry, and the resulting spectrum is shown below. The compound's spectroscopic data includes: - A mass spectrum with specific peaks. - A ^13C NMR spectrum showing four signals. - An IR spectrum displaying an intense peak near 1720 cm^-1. **Mass Spectrum Details:** The mass spectrum shows the relative abundance of ions of different mass-to-charge ratios (m/z). Notable features in this spectrum include: - A significant peak at m/z = 152. - A smaller peak at m/z = 150. These peaks are indicated on the graph with dashed lines pointing to the respective m/z values. **Graph Explanation:** - **X-axis (m/z):** Represents the mass-to-charge ratio of detected ions in the sample. - **Y-axis (Relative abundance):** Indicates the relative abundance or intensity of the detected ions. The peak at m/z = 152 suggests a molecular ion or a fragment ion with this specific mass-to-charge ratio. The smaller peak at m/z = 150 likely represents a related ion or a fragment. **Further Spectroscopic Data:** - **13C NMR Spectrum:** Four signals indicate the compound likely has four distinct carbon environments. - **IR Spectrum:** The intense peak near 1720 cm^-1 typically corresponds to a carbonyl group (C=O). **Conclusion:** Based on the mass spectrum, 13C NMR signals, and the IR spectrum, propose a structure for this compound. Consider the presence of a carbonyl group and the molecular ion peak in determining the compound's structure.
Transcribed Image Text:**Mass Spectrometry Analysis of an Unknown Compound** An unknown compound has been analyzed using mass spectrometry, and the resulting spectrum is shown below. The compound's spectroscopic data includes: - A mass spectrum with specific peaks. - A ^13C NMR spectrum showing four signals. - An IR spectrum displaying an intense peak near 1720 cm^-1. **Mass Spectrum Details:** The mass spectrum shows the relative abundance of ions of different mass-to-charge ratios (m/z). Notable features in this spectrum include: - A significant peak at m/z = 152. - A smaller peak at m/z = 150. These peaks are indicated on the graph with dashed lines pointing to the respective m/z values. **Graph Explanation:** - **X-axis (m/z):** Represents the mass-to-charge ratio of detected ions in the sample. - **Y-axis (Relative abundance):** Indicates the relative abundance or intensity of the detected ions. The peak at m/z = 152 suggests a molecular ion or a fragment ion with this specific mass-to-charge ratio. The smaller peak at m/z = 150 likely represents a related ion or a fragment. **Further Spectroscopic Data:** - **13C NMR Spectrum:** Four signals indicate the compound likely has four distinct carbon environments. - **IR Spectrum:** The intense peak near 1720 cm^-1 typically corresponds to a carbonyl group (C=O). **Conclusion:** Based on the mass spectrum, 13C NMR signals, and the IR spectrum, propose a structure for this compound. Consider the presence of a carbonyl group and the molecular ion peak in determining the compound's structure.
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