NMR Spectroscopy Flashcards
1
Q
Primary alkyl (R-CH3)
A
0.8-1.0
2
Q
Secondary Alkyl (R-CH2-R)
A
1.2-1.4
3
Q
Tertiary Alkyl (R3-CH)
A
1.4-1.7
4
Q
Allylic Alkyl (attached to a double-bonded C)
A
1.6-1.9
5
Q
Benzylic Alkyl (attached to a benzene ring)
A
2.2-2.5
6
Q
Ketone
A
2.1-2.6
7
Q
Alkyne
A
1.7-3.1
8
Q
Chloroalkane
A
3.6-3.8
9
Q
Bromoalkane
A
3.4-3.6
10
Q
Iodoalkane
A
3.1-3.3
11
Q
Next to an Ether
A
3.3-3.9
12
Q
Next to an Alcohol
A
3.3-4.0
13
Q
Terminal Alkene
A
4.6-5.0
14
Q
Internal Alkene
A
5.2-5.7
15
Q
Aromatic H
A
6.0-9.5
16
Q
Aldehyde
A
9.5-9.9
17
Q
Hydroxide
A
0.5-5.0
18
Q
Thiol
A
0.5-5.0
19
Q
Amine
A
0.5-5.0
20
Q
How does electronegativity of a haloalkane affect chemical shift?
A
Higher electronegativity = More deshielded = Higher chemical shift
21
Q
How does substitution of a haloalkane affect chemical shift?
A
More halogens = higher chemical shift
Further from halogen(s) = lower chemical shift
