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11 Nov 2019
1^H-NMR
CHARACTERISTIC PROTON CHEMICAL SHIFTS Type of Proton Structure Chemical Shift ppm 0.2 0.9 Secondary Tertiary R-C-H CCH triple bond,CC-H 4.6-5.9 2-3 6-85 Acetylenic 1.7 Chlorides H-C-C H-C-Br 3.4-4 Ethers Esters H-C-OR RCOO-C-H H-C-COOR H-C-COOH H-C-C-O 3.7-4.1 2-22 2-2.6 2-2.7 9-10 1-5.5 4-12 15-17 10.5-12 1-5 Acids Carbonyl Compounds Hydroxylic R-C-OH Ar-OH C-C-OH RCOOH RNH2 Enolic The Important Shifts (the ones you have to memorize) are listed below. Everything else you can kind of just guess. Aromatic ring 6.0 to 8.5 ppm .Alcohol 3.4 to 4.0 ppm .Aldehyde-9.0 to 10.0 ppm Carboxylic acid 10.5 to 12.0 ppm
1^H-NMR
CHARACTERISTIC PROTON CHEMICAL SHIFTS Type of Proton Structure Chemical Shift ppm 0.2 0.9 Secondary Tertiary R-C-H CCH triple bond,CC-H 4.6-5.9 2-3 6-85 Acetylenic 1.7 Chlorides H-C-C H-C-Br 3.4-4 Ethers Esters H-C-OR RCOO-C-H H-C-COOR H-C-COOH H-C-C-O 3.7-4.1 2-22 2-2.6 2-2.7 9-10 1-5.5 4-12 15-17 10.5-12 1-5 Acids Carbonyl Compounds Hydroxylic R-C-OH Ar-OH C-C-OH RCOOH RNH2 Enolic The Important Shifts (the ones you have to memorize) are listed below. Everything else you can kind of just guess. Aromatic ring 6.0 to 8.5 ppm .Alcohol 3.4 to 4.0 ppm .Aldehyde-9.0 to 10.0 ppm Carboxylic acid 10.5 to 12.0 ppm
Elin HesselLv2
16 Oct 2019