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Molecule problem. Defaulted to H2CO
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Compare vibrational frequencies in CCCBDB for H2CO (Formaldehyde)

B2PLYP/6-31G*

18 11 26 13 55
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency Scaled
Frequency
Harm.
diff
Fund.
diff
Symmetry Harmonic
Frequency
Fundamental
Frequency
Comment
1 A1 2969 2819   37 A1   2782  
2 A1 1822 1729   -17 A1   1746  
3 A1 1576 1496   -4 A1   1500  
4 B1 1208 1146   -21 B1   1167  
5 B2 3028 2874   31 B2   2843  
6 B2 1289 1223   -26 B2   1249  
The calculated vibrational frequencies were scaled by 0.9492

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.
See section Calculated; Vibrations; Scale Factors; Scale factor uncertainty for information on where the above scaling factor is from.