Concept #1: Common IR Frequencies
Example #1: Major IR absorptions
Example #2: Major IR absorptions
Example #3: Major IR absorptions
Example #4: Major IR absorptions
Practice: Answer each of the following questions based on the images below.
a) Which compounds show an intense peak ~ 1700 cm-1?
b) Which compound shows an intense, broad peak at ~ 3400 cm-1?
c) Which compound has a peak at ~1700 cm-1, but no peaks at 2700 cm-1?
d) Which compound has no signal beyond the fingerprint region?
Practice: Identify which carbonyl group will exhibit a signal at a lower wavenumber