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Proton NMR
J Values, Peaks, Defintions
23
Chemistry
Undergraduate 2
11/15/2010
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Term
Alkane J Value
 Definition
7 Hz
Term
Cis Alkene J Value
 Definition
10 Hz
Term
Trans Alkene J Value
 Definition
15 Hz
Term
Geminal Alkene J Value
 Definition
2 Hz
Term
Allylic/Vicinal Alkene J Value
 Definition
6 Hz
Term
Ortho Aromatics J Value
 Definition
8 Hz
Term
Meta Aromatics J Value
 Definition
2 Hz
Term
Alkane -CH3
 Definition
0.9 ppm
Term
Alkane -CH2
 Definition
1.3 ppm
Term
Alkane CH
 Definition
1.4 ppm
Term
H3C-C=O
 Definition
2.1 ppm
Term
-C=-C-H
 Definition
2.5 ppm
Term
R-CH2-X
 Definition
3-4 ppm
Term
-C=C-H
 Definition
5-6 ppm
Term
-C=C-CH3
 Definition
1.7 ppm
Term
Ph-H
 Definition
7.2 ppm
Term
Ph-CH3
 Definition
2.3 ppm
Term
R-CHO
 Definition
9-10 ppm
Term
R-COOH
 Definition
10-12 ppm
Term
R-OH
 Definition
Variable, about 2-5 ppm
Term
Ar-OH
 Definition
Variable, about 4-7
Term
R-NH2
 Definition
Variable, about 1.5-4 ppm
Term
Diastereotopic Protons
 Definition
If when using the imaginary replacement test, the two imaginary products are diasteromers
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