Organic Chemistry

Learn the toughest concepts covered in Organic Chemistry with step-by-step video tutorials and practice problems by world-class tutors.

15. Analytical Techniques:IR, NMR, Mass Spect

Infrared Spectroscopy Table

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Common IR Frequencies

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Major IR absorptions

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Major IR absorptions

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Major IR absorptions

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Major IR absorptions

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6
Problem

Answer each of the following questions based on the images below.


a) Which compounds show an intense peak ~ 1700 cm-1


b) Which compound shows an intense, broad peak at ~ 3400 cm-1


c) Which compound has a peak at ~1700 cm-1, but no peaks at 2700 cm-1


d) Which compound has no signal beyond the fingerprint region?

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Problem

Identify which carbonyl group will exhibit a signal at a lower wavenumber