Module 4: Analytical Techniques (4.2.4)

Question 1

Mass Spectroscopy

Answer 1

1. Molecular ion: Organic compound loses an e- to form a +ve ion. Indicates molecular mass.
2. Fragmentation: Molecular ions broken down into fragments.
3. A positively charged fragment and radical usually formed.

Question 2

Infrared Spectroscopy

Answer 2

1. Covalent bonds absorb IR which makes them shake and move.
2. Sample placed in IR Spectrometer and beam of IR is passed through.
3. Molecule absorbs some IR frequencies, computer used to identify which frequencies have been absorbed.