3.15 - NMR
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what does NMR spectroscopy allow you to work out?
Structure of a compound
The solvent for NMR does not contain ____ ?
Hydrogen atoms which would swamp the peaks
CDCl₃ is polar, which means it dissolves ____ ?
Polar molecules
CCl₄ is non-polar, which means it dissolves ____ ?
Non-polar molecules
What is the reference for NMR?
TMS - Tetramethylsilane
Where does reference peak appear?
0ppm by definition
Why is TMS used as a reference?
|> Single intense peak |> Inert, volatile & non-toxic
For Carbon NMR, the no. of peaks = ?
No. of Carbon environments
For ¹H/Proton NMR, the no. of peaks = ?
No. of Proton environments
What are Proton NMR integration values proportional to?
No. of protons
What do Proton NMR splitting values give?
No. of adjacent protons
What does a singlet mean in Proton NMR?
No adjacent protons
What does a doublet mean in Proton NMR?
One adjacent proton
What does a triplet mean in Proton NMR?
Two adjacent protons
What does a quartet mean in Proton NMR?
Three adjacent protons