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Nuclear magnetic resonance spectroscopy (A-level only)
This A-level-only topic uses spectroscopy to identify organic structures.
4
Objectives
10
Flashcards
10
Questions
88 min
Study time
AqaA LevelChemistryOrganic chemistry
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Syllabus checklist
What you need to know
4 objective pages available
NMR spectroscopy (A-level only)4 objectives
- Use carbon-13 NMR spectra to identify carbon environments.
- Use proton NMR chemical shifts to identify proton environments.
- Interpret integration and splitting patterns.
- Use NMR evidence with other analytical data to determine structures.
Key terms
Chemical ShiftIntegrationSpin-Spin CouplingChemical Environment
Exam tips
- Practice interpreting spectra: Regularly practice with various carbon-13 NMR spectra to become familiar with common chemical shifts.
- Practice interpreting NMR spectra: Regularly practice analyzing NMR spectra to become familiar with identifying chemical shifts and integration.
Common mistakes
- Misinterpreting chemical shifts: Refer to a chemical shift table to accurately identify the functional groups based on the observed ppm values.
- Misinterpreting chemical shifts: Refer to a chemical shift table and consider the influence of electronegative atoms and hybridization on the chemical shift.
Practice preview
- In a carbon-13 NMR spectrum, what does a peak at 100 ppm typically indicate?
- Explain how the number of peaks in a carbon-13 NMR spectrum relates to the number of different carbon environments in a molecule.
- A compound has a carbon-13 NMR spectrum showing peaks at 30 ppm, 50 ppm, and 75 ppm. Identify the possible functional groups present in the compound based on these chemical shifts.
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