Compare your reasoning with the explanation given below:
Do you want a more detailed explanation of these points? Check page21!
- The methyl group in acetaldehyde can rotate almost
freely around around the C-C single bond. Therefore the methyl protons
are exposed to a shielding averaged over time.
- The methyl protons are equivalent if averaged over
the NMR time scale, and give only a single NMR signal.
Considering what you have learned so far, would
you expect in a 1H-NMR-spektrum of
at room temperature