Typical Chemical Shifts in Carbon NMR Spectra
Structure | Chemical Shift (ppm) |
Carbonyl (ketone) | 205-220 |
Carbonyl (aldehyde) | 190-200 |
Carbonyl (ester, acid) | 170-185 |
Aromatic | 125-150 |
Alkenes | 115-140 |
Alkynes | 67-85 |
RCH2OH | 50-65 |
RCH2Cl | 40-45 |
RCH2NH2 | 37-45 |
R3CH | 25-35 |
CH3CO- | 20-30 |
R2CH2 | 16-25 |
RCH3 | 10-15 |