NMR

Question 1

What does NMR stand for

Answer 1

Nuclear magnetic resonance spectroscopy

Question 2

How does NMR work?

Answer 2

If a nucleus has an odd number of nucleons then it can act as a tiny magnet

H nuclei oppose a magnetic field when it is applied thus reducing its strength

Question 3

What is NMR spectroscopy used for?

Answer 3

To identify the structure of a compound

Question 4

Number of peaks= ?

Answer 4

Number of H environments

Question 5

What is the extent to which a magnetic field is altered measured in?

Answer 5

ppm

Question 6

What is the scale for NMR called?

Answer 6

Chemical shift

Question 7

What is the reference molecule for NMR?

Answer 7

Tetramethylsilane

Question 8

What is the standard molecule for NMR?

Answer 8

Tertramethylsilane

Question 9

Draw the skeletal formula of the molecule all shifts are compared to in NMR

Answer 9

CH3
          |
H3C-Si-CH3
          |
          CH3

Question 10

Why is tetramethylsilane used to

Answer 10

H

Question 11

Identify a solvent in which molecules can be dissolved before obtaining its proton NMR spectrum

Answer 11

CDCl3