Inorganic NMR

Question 1

What is a quadrupolar nuclei?

Answer 1

Nuclei with greater magnetic moments
They have lower symmetry than 1/2 spin nuclei
When these nuceli are placed in a magentic field their energies are split into multiple levels (number of levels given by: 2I+1)

Question 2

What is the quadrupole moment?

Answer 2

A measure of asymmetry in quadrupolar nuclei

Question 3

Draw the digram showing the multiple levels of quadrupole nuclei

Answer 3

Question 4

What are factors of rapid quadrupolar relaxation and what is it?

Answer 4

Wider NMR signals that I=1/2 nuceli. Line width increases because of:
* The quadruple moment of the nucleus
* The size of the molecule
* The symmetry of the molecule.

Question 6

What are characteristics of quadrupolar nuceli NMR?

Answer 6

Broad peaks - can lead to broad peaks for neighboring atoms
Smaller and more symmetrical molecules - sharper NMR signal

Question 7

What are the 4 common quadrupolar nuclei?

Answer 7