-
Methyl (CH3) without inductive effects
0.9 ppm
-
Methylene(CH2) w/o inductive effect
1.2 ppm
-
Methine (CH) w/o inductive effect
1.7 ppm
-
Oxygen of an alcohol or ether
+ 2.5 ppm to alpha protons
-
Oxygen of an ester O=CO
+3 ppm to alpha protons
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Carbonyl Group C=O, including ketones, aldehydes, and esters
+1 ppm
-
beta protons
only 1/5 of inductive effect
if Oxygen adds 2.5 ppm to alpha then it adds 0.5 ppm
-
Aromatic
neighborhood of 7 ppm
-
CH2 in ethylbenzene
benzene adds 1.4 so shifts to 2.6
-
-
-
Aromatic methyl
about 2.5
-
Alkyl halide
about 2-4 ppm
-
Alcohol
about 2-5 ppm produces broad signal
-
Vinylic H
about 4.5-6.5 ppm
-
Aryl (off benzene)
6.5-8 ppm
-
-
Carboxylic acid H
about 12 ppm
-
Ethy group
quartet downfield from a triplet
-
Isopropyl
douplet with integration of 6, upfield from septet with integration of 1
-
Tert- Butyl
singlet with integration of 9
-
Complex Splitting
2 different types of neighbors
-
Quartet of triplets
occurs with 2 neighbors, when Jab is much greater than Jbc
-
triplet of quartets
when Jbc is greater than Jab
-
Multiplet
complex splitting that is difficult to identify
-
Sextet (complex splitting)
If Jab and Jba are about equal
-
C NMR 0-50ppm
SP3 hybrid, methyl methylene, methine
-
C NMR 50-100
SP triple bond
SP3 with electronegative atoms
-
C NMR 100-150
SP2 hybrid C=C
-
C NMR 150-200
Carbonyl groups C=O
-
-
DEPT 135
shows CH and CH3, shows CH2 upside down
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