How can I identify the molecular fomula, based on an m/z of 350.7897?

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SUMMARY

The discussion focuses on identifying a molecular formula from a specific m/z value of 350.7897 using mass spectrometry techniques. Participants recommend utilizing the online tool www.chemcalc.org to deduce possible molecular structures based on the exact mass. Key strategies include applying the nitrogen rule, analyzing fragmentation patterns, and interpreting the significance of peak differences in the mass spectrum. The process involves iterative deduction of potential structures and their corresponding fragment losses.

PREREQUISITES
  • Understanding of mass spectrometry principles
  • Familiarity with the nitrogen rule in molecular formula determination
  • Experience using www.chemcalc.org for molecular structure analysis
  • Knowledge of fragmentation patterns in mass spectrometry
NEXT STEPS
  • Learn how to apply the nitrogen rule in molecular formula calculations
  • Explore advanced features of www.chemcalc.org for structure elucidation
  • Study fragmentation patterns in mass spectrometry for accurate molecular identification
  • Investigate common functional groups and their mass spectral signatures
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Chemistry students, analytical chemists, and researchers in mass spectrometry seeking to enhance their skills in molecular formula identification and structure elucidation.

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TL;DR Summary: I have the aforementioned m/z and a mass spec graph, my lecturer completely glossed over how to find the molecular formula so I'm stumped.

I have a mass spec with 4 peaks and the m/z value, how can I find the molecular formula.
 
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You have a very exact mass. Use www.chemcalc.org to find possible structures. Remember the nitrogen rule. Deduce possible structures and look if their fragmentation patterns fit the other m/z tops.
 
What do you think the highest mass ion represents (in most examples for students to solve, that is).
What do you think the difference between two peaks represents?
What group of atoms could that be?
Repeat for several of the fragment losses.
Build the molecule.
 
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