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11 Nov 2019
CHARACTERISTIC PROTON CHEMICAL SHIFTS Type of Proton Structure Chemical Shift, ppm 0.2 R-CH Tertiary R-C-H C-C-H triple bond,CC-H 4.6-5.9 2-3 6-8.5 Ar-C-H 1.7 Fluorides H-C-F 4-4.5 H-CI H-C-OH H-C-OR RCOO-C-H H-C-COOR H-C-COOH H-C-C-O Alcohols 3.4-4 3.3-4 3.7-4.1 2-2.2 2-2.6 2-2.7 Esters Carbonyl Compounds Aldehydic Hydroxylic R-C-OH Ar-OH C-C-OH 1-5.5 Enolic Carboxylic 10.5-12 1-5 The Important Shifts (the ones you have to memorize) are listed below. Everything else you can kind of jus 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
CHARACTERISTIC PROTON CHEMICAL SHIFTS Type of Proton Structure Chemical Shift, ppm 0.2 R-CH Tertiary R-C-H C-C-H triple bond,CC-H 4.6-5.9 2-3 6-8.5 Ar-C-H 1.7 Fluorides H-C-F 4-4.5 H-CI H-C-OH H-C-OR RCOO-C-H H-C-COOR H-C-COOH H-C-C-O Alcohols 3.4-4 3.3-4 3.7-4.1 2-2.2 2-2.6 2-2.7 Esters Carbonyl Compounds Aldehydic Hydroxylic R-C-OH Ar-OH C-C-OH 1-5.5 Enolic Carboxylic 10.5-12 1-5 The Important Shifts (the ones you have to memorize) are listed below. Everything else you can kind of jus 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
Hubert KochLv2
2 Feb 2019