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O-H alcohol
3200-3600

Carboxylic Acids (R-COOH)
O--H 2500-3500
C=O 1700

Aldehyde (R-C=O)
------- |
--------H
C=O 1700
C--H 2700 & 2800 (2 peaks)

Amides (R-C=O)
------ |
------R'-N-R''
1685 or 3300

Ketones (R-C=O)
------ |
------ R'
1710

Esters (R-C=O)
|
OR'
1735 C=O
1000-1300 C--O

Benzene
1500-1600
sp2 C-H left of 3000

NH2
2 peaks at 3300 (# peaks = # N-H bonds)
Alkanes
sp3 C-H Rt of 3000

Alkenes
sp2 C-H left of 3000
C=C 1650

Alkynes (terminal)
C triple bond C 2200 (internal)
sp C-H 3300 (external)

Nitriles
C triple bond N 2200
