Fragment Structure Analysis
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Questions and Answers

What is a consequence of molecular ions formed by EI mass spectrometry being highly energetic species?

  • They are highly stable.
  • They undergo rearrangements. (correct)
  • They are always singly charged.
  • They cannot undergo fragmentation.

    • What can happen to molecular ions formed by EI mass spectrometry in the case of complex molecules?

  • They only undergo rearangements.
  • They only undergo homolytic cleavage.
  • Many reactions can occur, including homolytic cleavage, heterolytic cleavage, and rearrangements. (correct)
  • They only undergo heterolytic cleavage of bonds.

    • What is formed by EI mass spectrometry?

  • Only molecular ions.
  • Neither molecular ions nor fragmented ions.
  • Molecular ions and fragmented ions. (correct)
  • Only fragmented ions.

    • What do M+ and M+1 peaks in a mass spectrum correspond to?

    <p>The molecular ion and an isotopic peak.</p> Signup and view all the answers

    What can be determined by analyzing the M++, M++1, and M++2 peaks in a mass spectrum?

    <p>The isotopic composition of the analyte.</p> Signup and view all the answers

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