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Infrared Spectroscopy and Mass Spectrometry

Infrared Spectroscopy and mass Spectrometry Introduction It is fundamental for an organic chemist to be able to identify, or characterize, the new compound that he/she has just made. Sometimes this can be achieved by a chemical means, such as determining the elemental composition and molecular weight. If the compound has been made previously, it is possible to compare physical properties (boiling points / melting points, etc ) with literature values. Chemical tests can be used to determine whether certain functionalities are present or absent. But, these are not sufficient for either complex molecules or new molecules that have never been made before.

sp3 is one quarter s, absorbs at 2800-3000cm-1 sp2 is one third s, absorbs at 3000-3100cm-1 sp is one half s, absorbs at ~3300cm-1. Interpretation of IR Spectra Figures 12-6, 12-7 (SLIDES) Characteristic Absorptions of Alcohols and Amines The O-H and N-H bonds are strong and therefore stiff, so they occur at high frequencies, usually above ...

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