Question detail
How can mass spectrometry be used to differentiate between isomers?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Organic analysis
Question
- A. By measuring the boiling points of the isomers
- B. By analyzing the fragmentation patterns of the isomers
- C. By comparing the infrared spectra of the isomers
- D. By determining the solubility of the isomers
Answer
By analyzing the fragmentation patterns of the isomers
Explanation
Mass spectrometry can differentiate isomers by examining their unique fragmentation patterns. Each isomer will fragment in a specific way, leading to distinct peaks in the mass spectrum. This allows chemists to identify and distinguish between different structural forms of the same molecular formula.
Common mistake
Misidentifying Molecular Ion Peaks
Students often confuse the molecular ion peak with other peaks in the mass spectrum, leading to incorrect identification of the molecular formula.
To correctly identify the molecular ion peak, students should look for the highest m/z value that corresponds to the intact molecule. This peak represents the molecular weight of the compound and is crucial for determining the molecular formula.
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