Topic 7-Modern Analytical Methods

Question 1

What does the peak with the highest m/z ratio tell you?

Answer 1

It shows the Mr of the whole molecule

Question 2

What happens when an electron knocks off an electron from a bond within a compound?

Answer 2

The bond breaks as 2 electrons are required
This leads to 2 different fragments
The radical fragment has the negative charge of the bond
The ion fragment has the positive charge on the bond

Question 3

What is a carbocation?

Answer 3

A carbon with a positive charge bonded to another carbon

Question 4

Explain the relationship between the amount of carbons in a carbocation and stability?

Answer 4

More carbons in a carbocation means more stability so more relative abundance

Question 5

Give an advantage and disadvantage of a chemical test instead of infrared spectroscopy?

Answer 5

Chemical test is cheaper and quicker
IR does not destroy the compound