TOPIC=USES OF IR SPECTROSCOPY.explain the lines please "the progress o...
Uses of IR Spectroscopy in Following Reactions
IR spectroscopy is a powerful technique used for the identification and quantification of molecules. It can also be used to follow the progress of chemical reactions. This is possible because different functional groups vibrate at different frequencies, and the presence or absence of these vibrations can provide information about the reaction taking place. One example of this is the oxidation of a secondary alcohol to a ketone.
Following Reaction Progress
By examining the infrared spectra of aliquots withdrawn from the reaction mixture, the progress of most reactions can be followed. In the case of the oxidation of a secondary alcohol to a ketone, the following changes can be observed:
- The O-H band near 3600cm-1 disappears.
- The C=O band near 1715cm-1 appears.
These changes indicate that the alcohol is being oxidized to a ketone, with the loss of the hydroxyl group and the formation of a carbonyl group.
Other Examples
IR spectroscopy can be used to follow the progress of many other reactions, including:
- Hydrolysis reactions
- Amide formation reactions
- Esterification reactions
- Reduction reactions
Each of these reactions involves changes in functional groups that can be detected by IR spectroscopy. By monitoring these changes, it is possible to determine the rate of reaction, the extent of conversion, and the identity of the products formed.
Conclusion
IR spectroscopy is a valuable tool for following the progress of chemical reactions. By examining the infrared spectra of aliquots withdrawn from the reaction mixture, it is possible to detect changes in functional groups that provide information about the reaction taking place. This information can be used to determine the rate of reaction, the extent of conversion, and the identity of the products formed.