Note the feature near 1700 cm-1 which is characteristic of the C=O group in aldehydes, ketones, carboxylic acids and esters.
The feature is comparatively sharp.
propanone
ethanal
butanal
| The three figures on this page show the infra red absorption spectra
of the carbonyl compounds ethanal (an aldehyde), propanone (a ketone) and
butanal (another aldehyde).
Note the feature near 1700 cm-1 which is characteristic of the C=O group in aldehydes, ketones, carboxylic acids and esters. The feature is comparatively sharp. |
propanone |
|
ethanal |
butanal |