Formaldehyde Vibrations
Shown below are some vibrations produced by the Formaldehyde molecule. The IR spectrum is shown below to correlate vibrations to the peaks. The peaks that were used were at 1352, 1653, 1875, 3244, and 3334 wavenumbers.


http://webbook.nist.gov/cgi/cbook.cgi?ID=C50000&Type=IR-SPEC&Index=1
 
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Formaldehyde Vibration at 1352 wavenumbers.

This is an HCH out of plane bending and it is not IR active. Therefore it is not correlated to a peak on the IR spectrum of formaldehyde.
 
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Formaldehyde Vibration at 1653 wavenumbers.

This is a carbonyl stretch correlated to the strong peak around 1750 wavenumbers on the IR spectrum above.
 
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Formaldehyde Vibration at 1875 wavenumbers

This is a carbonyl stretch correlated to the strong peak around 1750 wavenumbers on the IR spectrum above.
 
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Formaldehyde Vibration at 3244 wavenumbers

This is a symmetric stretch and it is not IR active. Therefore, it is not correlated to a peak on the IR spectrum.
 
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Formaldehyde Vibration at 3334 wavenumbers.

This is an asymmetric stretch and it is not IR active. Therefore, it is not correlated with a peak on the IR spectrum.
 
Based on template by A. Herráez as modified by J. Gutow
Page skeleton and JavaScript generated by export to web function using Jmol 14.2.15_2015.07.09 2015-07-09 22:22 on Mar 1, 2018.