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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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