¹³C Chemical shifts

relative to TMS	220	200	180	160	140	120	100	80	60	40	20	0	-20
H3C-C- primary
H3C-S-
H3C-N
H3C-O-
-H2C-C secondary
Cyclopropanes
-H2C-S-
-H2C-N
-H2C-O-
-H2C-Hal								F	Cl	Br	I
>CH-C- tertiary
>CH-S-
>CH-N
>CH-Hal							F	Cl	Br	I
C-C quarternary
C-S-
C-N
C-O-
C-Hal								Cl	Br	I
relative to TMS	220	200	180	160	140	120	100	80	60	40	20	0	-20
Alkines
C=C=C Allenes
C=C Alkenes
Aromatic Compounds
Heteroaromatic Compounds
-S-CN Rhodanides
-N=C=S Isothiocyanates
-O-CN
-N=C=O
-CN
-NC
>C=N- Azomethines
(-CO)2O Anhydrides
-COOR
-CONHR
-(CO)2NR Imides
-COOH
-COCl
-CHO
>C=O
relative to TMS	220	200	180	160	140	120	100	80	60	40	20	0	-20