Chapter 12 - Structure Determination: Mass Spectrometry And Infrared Spectroscopy Page 17

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Interpreting Infrared Spectra
Most functional groups absorb at about the
same energy and intensity independent of the
molecule they are in.
Characteristic higher energy IR absorptions
can be used to confirm the presence of a
functional group in a molecule.
IR spectrum has lower energy region
characteristic of a molecule as a whole
(“fingerprint” region).
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