Unit 3 - IR Flashcards Preview

Ochem > Unit 3 - IR > Flashcards

Flashcards in Unit 3 - IR Deck (9)
Loading flashcards...
1

What does Imfrared Spectroscopy do?

Provides information on all functional groups

2

How is wave number calculated?

1/ wavelength

3

What does the wave number of the absorbed ligh reveal?

Which functional groups are present in the molecule

4

How is vibration repeated to number of atoms?

Molecules with a greater number of atoms undergo more vibrations than molecules with fewer atoms

5

What is the formula for the number of vibrations in a molecule?

3n - 6

6

What leads to absorption of energy in IR?

Vibrations that change the dipole moment

7

What are IR inactive dipoles?

Vibrations that do not change the dipole moment

8

What is a greater intensity IR absorption associated with?

A greater change in the dipole

9

Where is the fingerprint region?

The region that show unique patterns 1500 - 500