BRAINCAKE1H NMR Spectroscopy
1H NMR (proton NMR) detects hydrogen nuclei. It gives more information than 13C NMR because it shows how many hydrogens are in each environment and what is next to them.
Hydrogen atoms in the same chemical environment are equivalent and give one signal. So:
• the number of peaks = the number of different hydrogen environments
• the chemical shift of each peak shows the type of environment (for example, next to O or C=O)
• the relative area of each peak gives the ratio of hydrogens in each environment (integration)
• in a high resolution spectrum, the splitting of each peak shows the number of H on neighbouring carbons
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Key terms in this lesson
- chemical shift
- The position of a signal in an NMR spectrum, measured in parts per million relative to TMS, determined by how shielded the nucleus is by electrons.
More in Modern Analytical Techniques
- Retention Times
- Nuclear Magnetic Resonance
- Chemical Shift
- 13C NMR Spectroscopy
- Integration Traces
- Spin-Spin Splitting
- The n+1 Rule
- Deducing Structures from Combined Data
All 15 lessons in Modern Analytical Techniques · All Edexcel A-level Chemistry topics