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Spectroscopy
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10
Carboxylic acid (RCO2H)
9
Aldehyde (RCHO)
8-7
Aromatic
6-4
C=CH (vinyl)
4.5-3
electron withdrawing (CH-X)
2
Carbonyl or allylic
1
Alkyl
0-3
Cis
7-10
Z on Alkene
12-18
E on Alkene
3600
OH, NH
3300
sp (alkyne)
3100
sp2 (alkene)
2900
sp3 (C-H)
2900-2800
aldehyde (IR)
2200-2000 strong
nitrile, terminal alkyne
2200-2000 weak
internal alkyne
1800-1600
carbonyl (IR)
1600-1400
alkene, aromatics (IR)
1100
C-O
3000 strong
carboxylic acid (IR)