H-NMR Chemical Shifts Flashcards
1
Q
0 ppm
A
Completely shielded hydrogen
2
Q
0.2 - 0.6 ppm (sharp)
A
Hydrogen of a cyclopropyl
3
Q
0.9 - 1.2 ppm
A
Primary alkyl hydrogen
4
Q
0.9 - 1.8 ppm (sharp)
A
Alkyl hydrogen range
5
Q
1.2 - 1.5 ppm
A
Secondary alkyl hydrogen
6
Q
1.5 - 1.8 ppm
A
Tertiary alkyl hydrogen
7
Q
1.6 - 1.9 ppm (sharp)
A
Allylic hydrogen
8
Q
2.1 - 2.9 ppm (sharp)
A
Some amines (N — H bond)
Benzylic hydrogens
Alpha hydrogens of carbonyl compounds
Terminal alkyne hydrogen
9
Q
3.2 - 4.5 ppm (sharp)
A
Hydrogens attached to sp3 hybridized carbons or oxygens (alcohols, esters, ethers)
10
Q
5 - 6 ppm (sharp)
A
Hydrogens attached to sp2 hybridized carbons in alkenes
11
Q
6 - 8 ppm (sharp)
A
Aromatic hydrogens
12
Q
9 - 10 ppm (sharp)
A
Hydrogens of aldehydes
13
Q
11 - 13 ppm
A
Hydrogen of a carboxylic acid
