NMR Flashcards
1
Q
What does number of peaks show on C-13?
A
How many carbon environments
2
Q
What does number of peaks show on proton NMR?
A
How many proton environments
3
Q
What does peak area show on proton NMR?
A
Relative number of protons in each environment
4
Q
Splitting pattern?
A
Protons on adjacent carbon atom , n+1
5
Q
What is TMS?
A
Tetramethylsilane - all NMR spectra are standardised relative to TMS which is defined as having a chemical shift
6
Q
What is Deuterated solvents used for and why?
A
Undesirable to have peaks from solvent appear in NMR spectrum and are used as the peak doesn’t appear in NMR
7
Q
How do you identify OH and NH bonds?
A
Add D2O to sample causing OH and NH groups to be replaced by deuterium atoms so they disappear
