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¹³C NMR
13C NMR chemical shift ranges by carbon environment.
1-19 of 19 records
All ¹³C NMR
13C NMR chemical shift ranges by carbon environment.
R-CH₃
¹³C NMR: a R-CH₃ carbon appears at δ 0-30 ppm. Primary carbon.
R₂CH₂
¹³C NMR: a R₂CH₂ carbon appears at δ 15-55 ppm. Secondary carbon.
R₃CH
¹³C NMR: a R₃CH carbon appears at δ 20-60 ppm. Tertiary carbon.
R₄C
¹³C NMR: a R₄C carbon appears at δ 30-45 ppm. Quaternary carbon.
C-X (halide)
¹³C NMR: a C-X (halide) carbon appears at δ 10-75 ppm. Depends on halogen.
C-O (alcohol, ether)
¹³C NMR: a C-O (alcohol, ether) carbon appears at δ 50-90 ppm.
C-N (amine)
¹³C NMR: a C-N (amine) carbon appears at δ 30-65 ppm.
C=C (alkene)
¹³C NMR: a C=C (alkene) carbon appears at δ 100-150 ppm.
C≡C (alkyne)
¹³C NMR: a C≡C (alkyne) carbon appears at δ 65-90 ppm. More shielded than expected.
Aromatic C (general)
¹³C NMR: a Aromatic C (general) carbon appears at δ 110-160 ppm.
Aromatic C-H
¹³C NMR: a Aromatic C-H carbon appears at δ 110-130 ppm.
Aromatic C-C (ipso)
¹³C NMR: a Aromatic C-C (ipso) carbon appears at δ 125-150 ppm. Substituted position.
Aromatic C-O
¹³C NMR: a Aromatic C-O carbon appears at δ 150-165 ppm. e.g., phenol.
C=O (ketone)
¹³C NMR: a C=O (ketone) carbon appears at δ 195-220 ppm.
C=O (aldehyde)
¹³C NMR: a C=O (aldehyde) carbon appears at δ 190-205 ppm.
C=O (carboxylic acid)
¹³C NMR: a C=O (carboxylic acid) carbon appears at δ 170-185 ppm.
C=O (ester)
¹³C NMR: a C=O (ester) carbon appears at δ 160-175 ppm.
C=O (amide)
¹³C NMR: a C=O (amide) carbon appears at δ 160-180 ppm. Lower than ester (resonance).
C≡N (nitrile)
¹³C NMR: a C≡N (nitrile) carbon appears at δ 115-125 ppm.
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