Nuclear Magnetic Resonance Flashcards
1
Q
Determine structure from a mass spectrum with peaks at 15, 29, 46
A
15 = C(+)H3
29 = C(+)H2CH3
46 = (+)OH
Ethanol
2
Q
What does NMR give info about?
A
Number & environment of H atoms in a molecule
3
Q
How do atomic nuclei spin?
A
Some spin clockwise, some anticlockwise
4
Q
What does each spinning nucleus do?
A
Align itself with magnetic field
5
Q
How are nuclei protected from external field?
A
By electrons - shielding
6
Q
What is used as a reference point?
A
Tetramethylsilane - TMS
