Some characteristic absorption frequencies in IR spectroscopy
- Page ID
- 1100
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Bond type | Frequency (cm-1) |
C-H alkane | 2950 – 2850 |
C-H alkene | 3080 – 3020 |
C-H aldehyde | ~2900 |
C-H alkyne | ~3300 |
alkyne triple bond | 2250 – 2100 (s) |
alkene double bond | 1680 - 1620 (s) |
carbonyl, ketone | 1725 – 1700 (s) |
carbonyl, aldehyde | 1740 – 1720 (s) |
carbonyl, ester | 1750 – 1730 (s) |
carbonyl, acid | 1725 – 1700 (s) |
carbonyl, amide | 1690 – 1650 (s) |
O-H, alcohol | 3600 – 3200 (s, broad) |
O-H, acid | 3000 – 2500 (s, broad) |
C-O, alcohol, ester, ether | 1300 - 1000 |
s = strong absorbance
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at (Under_Construction/Purgatory/Book:_Organic_Chemistry_with_a_Biological_Emphasis_(Soderberg)/Reference_Tables/Some_characteristic_absorption_frequencies_in_IR_spectroscopy), /content/body/div/p/span, line 1, column 2
Contributors
- Organic Chemistry With a Biological Emphasis, Tim Soderberg (University of Minnesota, Morris)