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Infrared Spectroscopy, Example #6
Analysis: C3H10NO
Help with Analysis
IR Spectrum
| Correlation Table | Common Absorbances | Interpret IR |
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|
Infrared Spectroscopy, Example #6
Analysis: C3H10NO
Help with Analysis
IR Spectrum
| Correlation Table | Common Absorbances | Interpret IR |
| Give Structure | Next Example | Return to IR Home |
From the molecular formula, the compound has "1 degree of unsaturation" (one double bond, carbonyl or ring).
C3710NO
| 3400-3200 cm-1: | strong peak suggesting OH or NH |
| 3100 cm-1: | minor peak indicating possible unsaturated CH |
| 2900 cm-1: | minor peaks indicating saturated CH |
| 2200 cm-1: | no unsymmetrical triple bonds |
| 1650 cm-1: | strong carbonyl absorbance |
| 1550 cm-1: | moderate absorbance band, characteristic of "N-H bending" |
The spectrum seems to be consistent with a compound containing a carbonyl group and an N-H group. The low carbonyl band (1650 cm-1) and the N-H bending band strongly suggest an amide linkage; this pair of absorbances are often termed the "amide I and II" bands.
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