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¹H NMR
1H NMR chemical shift ranges by proton environment.
1-23 of 23 records
All ¹H NMR
1H NMR chemical shift ranges by proton environment.
R-CH₃ (primary alkyl)
¹H NMR: protons in a R-CH₃ (primary alkyl) environment appear at δ 0.9-1.0 ppm. Most shielded.
R₂CH₂ (secondary alkyl)
¹H NMR: protons in a R₂CH₂ (secondary alkyl) environment appear at δ 1.2-1.4 ppm.
R₃CH (tertiary alkyl)
¹H NMR: protons in a R₃CH (tertiary alkyl) environment appear at δ 1.4-1.7 ppm.
Allylic (C=C-CH)
¹H NMR: protons in a Allylic (C=C-CH) environment appear at δ 1.6-2.0 ppm. Adjacent to C=C.
Benzylic (Ar-CH)
¹H NMR: protons in a Benzylic (Ar-CH) environment appear at δ 2.2-2.5 ppm. Adjacent to aromatic ring.
Propargylic (C≡C-CH)
¹H NMR: protons in a Propargylic (C≡C-CH) environment appear at δ 1.8-2.2 ppm.
α to C=O (ketone/aldehyde)
¹H NMR: protons in a α to C=O (ketone/aldehyde) environment appear at δ 2.0-2.5 ppm. Deshielded by carbonyl.
α to halogen (R-CHX)
¹H NMR: protons in a α to halogen (R-CHX) environment appear at δ 3.0-4.0 ppm. More deshielded: I < Br < Cl < F.
α to oxygen (R-CH₂-O)
¹H NMR: protons in a α to oxygen (R-CH₂-O) environment appear at δ 3.4-4.0 ppm. Ethers, alcohols.
α to nitrogen (R-CH₂-N)
¹H NMR: protons in a α to nitrogen (R-CH₂-N) environment appear at δ 2.2-2.8 ppm.
R-OH (alcohol)
¹H NMR: protons in a R-OH (alcohol) environment appear at δ 1-5 ppm. Variable, broad, exchanges with D₂O.
Ar-OH (phenol)
¹H NMR: protons in a Ar-OH (phenol) environment appear at δ 4-8 ppm. More deshielded than aliphatic OH.
R-NH₂ (amine)
¹H NMR: protons in a R-NH₂ (amine) environment appear at δ 0.5-3 ppm. Variable, broad, exchanges.
Amide N-H
¹H NMR: protons in a Amide N-H environment appear at δ 5-8 ppm. Broad.
Vinyl H (C=CH)
¹H NMR: protons in a Vinyl H (C=CH) environment appear at δ 4.5-6.5 ppm. Depends on substitution.
Terminal alkene (=CH₂)
¹H NMR: protons in a Terminal alkene (=CH₂) environment appear at δ 4.6-5.0 ppm.
Internal alkene (=CHR)
¹H NMR: protons in a Internal alkene (=CHR) environment appear at δ 5.2-5.7 ppm.
Benzene ring
¹H NMR: protons in a Benzene ring environment appear at δ 6.5-8.5 ppm. Ring current deshielding.
Electron-rich aromatic
¹H NMR: protons in a Electron-rich aromatic environment appear at δ 6.5-7.5 ppm. e.g., anisole.
Electron-poor aromatic
¹H NMR: protons in a Electron-poor aromatic environment appear at δ 7.5-8.5 ppm. e.g., nitrobenzene.
Terminal alkyne (≡C-H)
¹H NMR: protons in a Terminal alkyne (≡C-H) environment appear at δ 1.8-3.0 ppm. Surprisingly shielded (anisotropy).
Aldehyde (R-CHO)
¹H NMR: protons in a Aldehyde (R-CHO) environment appear at δ 9.5-10.0 ppm. Very deshielded, distinctive.
Carboxylic acid (R-COOH)
¹H NMR: protons in a Carboxylic acid (R-COOH) environment appear at δ 10-12 ppm. Most deshielded, exchanges.
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