6.3.4 Proton NMR Flashcards
What does each peak on the spectra indicate?
One hydrogen environment for every peak.
What does the relative area under a peak indicate?
The relative number of hydrogen atoms in each environment.
What is the difference between carbon-13 NMR and Proton NMR?
The peaks in a spectrum split according to how the hydrogen atoms are arranged.
Define spin-spin coupling.
A peak that represents a hydrogen environment can be split. The splitting is caused by the influence of hydrogen atoms that are bonded to neighbouring carbons.
What occurs when you use an ordinary solvent like ethanol or water to the spectrum?
The hydrogen ions nuclei in the solvent would add peaks to the spectrum.
What atom is used to replace hydrogen?
Deuterium.
Why is deuterium used instead of hydrogen?
Deuterium nuclei don’t absorb the radio waves energy, so they don’t add peaks to the spectrum.
How do you differentiate between OH and NH?
Run two spectra on the molecule and add a little bit of deuterium oxide.
