Wednesday, April 8

Reminders: •  Take-home due FRIDAY

Handouts:

Readings: • Chang & Thoman: Appendix 11.1, 14.6

Today: •  Other types of spectroscopy

•  Vibronic •  NMR

•  Moving to the solid state

Last Time: -  Finished practice problems

Electronic-vibrational (vibronic) transitions

Electronic-vibrational (vibronic) transitions

Franck-Condon Principle

Energy

UV/Vis IR Microwave

• Electronic Transitions • HOMO-LUMO gap • Sharp = Atoms • Broad = Molecules

• Vibrational transitions • Bond strength • Bond Order

• Rotational transitions • Bond length • Geometry

Molecules only

Radio X-Ray

14

A

A

B

B