IRrittable
IR is useful for what kind of molecules?
Organic
Amide C=O
1630-1690
odd number of protons, odd number of neutrons, or both
It’s useful is determining what?
Functional Groups
C=C
1620-1680
Alcohol and Phenol -OH group where
3200-3600
Aromatic Ring
1450-1550
-OH group of a carboxylic acid
2500-3200
What is the Fingerprint region
less than 1500 cm
-NH group amine
3300-3500
what makes a peak strong?
large atom and small atom difference
location of bond
Amide -NH group
what causes a strong peak
H-bonding
Alkane C-H
2800-3000
How many humps are in a NH2, NH, and N IR
Alkene C-H
3000-3100
Why is the difference in the carbonyl wavelength
Resonance
Alkyne C-H
~3300
Why is there a difference in C-H peaks?
The number of C-H bonds
Aldehyde C-H
2720 and 2820
Nitrile
2210-2260
Alkyne
2100-2260