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оооо 29 43 О 72 57 Relative In 40 20- 0+mm 10 20 30 40 50 60 72 70 m/z 80 90 100

оооо 29 43 О 72 57 Relative In 40 20- 0+mm 10 20 30 40 50 60 72 70 m/z 80 90 100

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter7: The Structure Of Atoms And Periodic Trends
Section: Chapter Questions
Problem 83SCQ: Slaters rules are a way to estimate the effective nuclear charge experienced by an electron. In this...
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### Mass Spectrum Analysis **Question:** Which is the parent ion (M⁺) in this mass spectrum? #### Explanation The image presents a mass spectrum graph which plots the relative intensity of ion signals on the y-axis against the mass-to-charge ratio (m/z) on the x-axis. **Key Features of the Graph:** - **Title:** "Which is the parent ion (M⁺) in this mass spectrum?" - **X-Axis (Horizontal):** Represents the mass-to-charge ratio (m/z). This axis ranges from 10 to 120. - **Y-Axis (Vertical):** Represents the relative intensity of the detected ions. This axis ranges from 0 to 100. - **Major Peaks and Identified m/z Values:** - **29** - **43** - **57** - **72** #### Notable Peaks: - The tallest peak in the spectrum corresponds to m/z value 43, with a relative intensity of 100. This is often called the base peak and is generally the most stable ion. - Other notable peaks include m/z values 29, 57, and 72, with varying relative intensities. **Determining the Parent Ion:** The parent ion (M⁺) correspond typically to the peak that represents the molecular ion, often among the highest m/z value peaks in the spectrum. In this case, the highest noted m/z value is 72, suggesting that the parent ion likely has an m/z of 72. #### Conclusion: In this mass spectrum, the parent ion (M⁺) can be identified as the peak at m/z = 72, as it represents the highest m/z value among the labeled peaks. This type of analysis is critical in fields such as organic chemistry and biochemistry, where understanding the molecular structure and composition of substances is essential.
Transcribed Image Text:### Mass Spectrum Analysis **Question:** Which is the parent ion (M⁺) in this mass spectrum? #### Explanation The image presents a mass spectrum graph which plots the relative intensity of ion signals on the y-axis against the mass-to-charge ratio (m/z) on the x-axis. **Key Features of the Graph:** - **Title:** "Which is the parent ion (M⁺) in this mass spectrum?" - **X-Axis (Horizontal):** Represents the mass-to-charge ratio (m/z). This axis ranges from 10 to 120. - **Y-Axis (Vertical):** Represents the relative intensity of the detected ions. This axis ranges from 0 to 100. - **Major Peaks and Identified m/z Values:** - **29** - **43** - **57** - **72** #### Notable Peaks: - The tallest peak in the spectrum corresponds to m/z value 43, with a relative intensity of 100. This is often called the base peak and is generally the most stable ion. - Other notable peaks include m/z values 29, 57, and 72, with varying relative intensities. **Determining the Parent Ion:** The parent ion (M⁺) correspond typically to the peak that represents the molecular ion, often among the highest m/z value peaks in the spectrum. In this case, the highest noted m/z value is 72, suggesting that the parent ion likely has an m/z of 72. #### Conclusion: In this mass spectrum, the parent ion (M⁺) can be identified as the peak at m/z = 72, as it represents the highest m/z value among the labeled peaks. This type of analysis is critical in fields such as organic chemistry and biochemistry, where understanding the molecular structure and composition of substances is essential.
### Mass Spectrometry: Understanding the m/z Spectrum #### Introduction to the Spectrum The image shows a mass spectrometry output, presenting the relative intensity of ions detected, plotted against their mass-to-charge (m/z) ratios. This type of graph is critical for identifying and analyzing molecular structures in various compounds. #### Graph Components 1. **X-Axis (m/z)**: This represents the mass-to-charge ratio (m/z) spectrum, ranging here from 10 to 120. Each peak within this range corresponds to ions of a specific m/z value. 2. **Y-Axis (Relative Intensity)**: The relative intensity indicates the abundance of detected ions at each m/z value, normalized to the most intense peak. 3. **Various Peaks**: Several peaks appear on the spectrum, each representing ions of different m/z values and their relative abundances. Notable peaks are observed at m/z values of 29, 43, 57, and a marked peak at 72. #### Analysis of Significant Peaks - **Peak at 72:** This prominent peak highlights a significant ion with an m/z value of 72, suggesting it is one of the primary fragments or the molecular ion of the sample. - **Other Marked Peaks:** - **m/z 29** - **m/z 43** - **m/z 57** These peaks are noteworthy and indicate the presence of ions common to the structure of the analyzed compound. #### Spectrum Interpretation - **Identifying Compounds**: Each peak can be cross-referenced with known m/z values from reference libraries, aiding in the identification of the compound or its decomposition products. - **Fragmentation Patterns**: The arrangement and relative intensity of these peaks help illustrate the fragmentation pattern, which is crucial for deducing the molecular structure. Understanding and interpreting these spectral data allows for detailed analysis and identification of chemical compounds through their mass characteristics and fragmentation patterns.
Transcribed Image Text:### Mass Spectrometry: Understanding the m/z Spectrum #### Introduction to the Spectrum The image shows a mass spectrometry output, presenting the relative intensity of ions detected, plotted against their mass-to-charge (m/z) ratios. This type of graph is critical for identifying and analyzing molecular structures in various compounds. #### Graph Components 1. **X-Axis (m/z)**: This represents the mass-to-charge ratio (m/z) spectrum, ranging here from 10 to 120. Each peak within this range corresponds to ions of a specific m/z value. 2. **Y-Axis (Relative Intensity)**: The relative intensity indicates the abundance of detected ions at each m/z value, normalized to the most intense peak. 3. **Various Peaks**: Several peaks appear on the spectrum, each representing ions of different m/z values and their relative abundances. Notable peaks are observed at m/z values of 29, 43, 57, and a marked peak at 72. #### Analysis of Significant Peaks - **Peak at 72:** This prominent peak highlights a significant ion with an m/z value of 72, suggesting it is one of the primary fragments or the molecular ion of the sample. - **Other Marked Peaks:** - **m/z 29** - **m/z 43** - **m/z 57** These peaks are noteworthy and indicate the presence of ions common to the structure of the analyzed compound. #### Spectrum Interpretation - **Identifying Compounds**: Each peak can be cross-referenced with known m/z values from reference libraries, aiding in the identification of the compound or its decomposition products. - **Fragmentation Patterns**: The arrangement and relative intensity of these peaks help illustrate the fragmentation pattern, which is crucial for deducing the molecular structure. Understanding and interpreting these spectral data allows for detailed analysis and identification of chemical compounds through their mass characteristics and fragmentation patterns.
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