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Compare vibrational frequencies in CCCBDB for H2POH (Phosphinous acid)

PBEPBE/3-21G*

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 A' 3343 3188           
2 A' 2217 2114           
3 A' 1171 1116           
4 A' 1107 1055           
5 A' 890 848           
6 A' 778 741           
7 A" 2218 2115           
8 A" 873 832           
9 A" 473 451           
The calculated vibrational frequencies were scaled by 0.9535

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.