Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Mass Spectrometry
This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is als…
Question
The compound has carbon, hydrogen, and oxygen, and the M+ peak is at 88 m/z. The compound loses a fragment very easily to form the peak at 70 m/z, but I’m not sure what exactly is being lost. What is the chemical formula, and the structures for the M+ peak and peaks at 57, 41, and 29 m/z
**Mass Spectrometry Analysis** **A. Fragment Loss Analysis** This compound loses a fragment very easily to form the peak at 70 m/z. What has been lost? **B. Chemical Formula Determination** Determine the chemical formula. Predict the structure for the M+ peak. **C. Structure Prediction** Predict the structures for the peaks at 57, 41, and 29 m/z. **Graph Explanation** The graph displayed is a mass spectrum, which plots relative intensity against the mass-to-charge ratio (m/z). - **X-Axis (m/z):** Represents the mass-to-charge ratio of ionized fragments. - **Y-Axis (Relative Intensity):** Shows the abundance of each ion as a percentage of the most abundant ion peak in the spectrum. Key observations: - There are peaks of varying intensities at m/z values of approximately 29, 41, 57, and 70. - The peak at 70 m/z is significant and indicates the formation of a stable fragment when the original compound undergoes fragmentation. - Other notable peaks are visible at 57, 41, and 29 m/z, suggesting the presence of fragment ions with these m/z values.
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Transcribed Image Text:**Mass Spectrometry Analysis** **A. Fragment Loss Analysis** This compound loses a fragment very easily to form the peak at 70 m/z. What has been lost? **B. Chemical Formula Determination** Determine the chemical formula. Predict the structure for the M+ peak. **C. Structure Prediction** Predict the structures for the peaks at 57, 41, and 29 m/z. **Graph Explanation** The graph displayed is a mass spectrum, which plots relative intensity against the mass-to-charge ratio (m/z). - **X-Axis (m/z):** Represents the mass-to-charge ratio of ionized fragments. - **Y-Axis (Relative Intensity):** Shows the abundance of each ion as a percentage of the most abundant ion peak in the spectrum. Key observations: - There are peaks of varying intensities at m/z values of approximately 29, 41, 57, and 70. - The peak at 70 m/z is significant and indicates the formation of a stable fragment when the original compound undergoes fragmentation. - Other notable peaks are visible at 57, 41, and 29 m/z, suggesting the presence of fragment ions with these m/z values.
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