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Compare vibrational frequencies in CCCBDB for FCN (Cyanogen fluoride)

MP2=FULL/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 Σ 2149 2038   -280 Σ   2317  
2 Σ 1005 952   -108 Σ   1060  
3 Π 373 354   -97 Π   451  
The calculated vibrational frequencies were scaled by 0.948

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.