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The intensity of M+, M+1, and M+2 peak are 100.0, 6.8, 31.9. The compound contains carbons, hydrogens, and a heteroatom. What is the molecular formula of the compound? (use format CXHYZ, where Z is heteroatom) 100 MS-NW-549s 80 60 40 20 10 20 30 40 50 60 70 80 90 100 110 Relative Intensity

The intensity of M+, M+1, and M+2 peak are 100.0, 6.8, 31.9. The compound contains carbons, hydrogens, and a heteroatom. What is the molecular formula of the compound? (use format CXHYZ, where Z is heteroatom) 100 MS-NW-549s 80 60 40 20 10 20 30 40 50 60 70 80 90 100 110 Relative Intensity

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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### Mass Spectrometry Analysis: Determining Molecular Formula In this educational exercise, we are analyzing the mass spectrometry data of an unknown compound to determine its molecular formula. The compound in question contains carbon (C), hydrogen (H), and a heteroatom (Z). #### Given Data - The intensity of M+, M+1, and M+2 peaks are 100.0, 6.8, and 31.9, respectively. #### Objective - Determine the molecular formula of the compound (in the format CxHyZ). #### Understanding the Graph The mass spectrum displayed provides the relative intensity of detected ions plotted against their mass-to-charge ratio (m/z). 1. **X-Axis (m/z ratio)**: - Values range from 10 to 120. - This axis represents the mass-to-charge ratio of the ions detected. 2. **Y-Axis (Relative Intensity)**: - Values range from 0 to 100. - This axis represents the intensity of the ion peaks relative to the most intense peak. 3. **Key Peaks**: - The most intense peak (M+) is normalized to 100. - The subsequent peaks at M+1 and M+2 highlight the presence of isotopes and heteroatoms in the compound. ##### Peak Distribution Analysis - **M+ Peak (Base Peak)**: This is typically the molecular ion peak; here it has an intensity of 100. - **M+1 Peak (Isotope Peak)**: The next peak has a relative intensity of 6.8. - **M+2 Peak**: This peak, with a significant intensity of 31.9, suggests the presence of a heteroatom that has isotopes contributing significantly to this peak (e.g., sulfur, chlorine, or bromine). #### Steps to Determine the Molecular Formula 1. **Identify the Base Peak (M+) for Molecular Mass**: - The base peak represents the molecular ion (M), and helps in determining the molecular mass of the compound. 2. **Evaluate the Contributions of C, H, and Heteroatom (Z)**: - The M+1 peak often arises due to 13C isotopes. - The M+2 peak can indicate the presence of heteroatoms like Cl or Br, which have significant isotopic patterns. 3. **Apply Intensity Ratios**: - Use the
Transcribed Image Text:### Mass Spectrometry Analysis: Determining Molecular Formula In this educational exercise, we are analyzing the mass spectrometry data of an unknown compound to determine its molecular formula. The compound in question contains carbon (C), hydrogen (H), and a heteroatom (Z). #### Given Data - The intensity of M+, M+1, and M+2 peaks are 100.0, 6.8, and 31.9, respectively. #### Objective - Determine the molecular formula of the compound (in the format CxHyZ). #### Understanding the Graph The mass spectrum displayed provides the relative intensity of detected ions plotted against their mass-to-charge ratio (m/z). 1. **X-Axis (m/z ratio)**: - Values range from 10 to 120. - This axis represents the mass-to-charge ratio of the ions detected. 2. **Y-Axis (Relative Intensity)**: - Values range from 0 to 100. - This axis represents the intensity of the ion peaks relative to the most intense peak. 3. **Key Peaks**: - The most intense peak (M+) is normalized to 100. - The subsequent peaks at M+1 and M+2 highlight the presence of isotopes and heteroatoms in the compound. ##### Peak Distribution Analysis - **M+ Peak (Base Peak)**: This is typically the molecular ion peak; here it has an intensity of 100. - **M+1 Peak (Isotope Peak)**: The next peak has a relative intensity of 6.8. - **M+2 Peak**: This peak, with a significant intensity of 31.9, suggests the presence of a heteroatom that has isotopes contributing significantly to this peak (e.g., sulfur, chlorine, or bromine). #### Steps to Determine the Molecular Formula 1. **Identify the Base Peak (M+) for Molecular Mass**: - The base peak represents the molecular ion (M), and helps in determining the molecular mass of the compound. 2. **Evaluate the Contributions of C, H, and Heteroatom (Z)**: - The M+1 peak often arises due to 13C isotopes. - The M+2 peak can indicate the presence of heteroatoms like Cl or Br, which have significant isotopic patterns. 3. **Apply Intensity Ratios**: - Use the
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