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