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Compare vibrational frequencies in CCCBDB for CH3 (Methyl radical)

CCSD/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' 3198 2982   -22 A1'   3004  
2 A2" 422 393   -213 A2"   606  
3 E' 3385 3156   -4 E'   3161  
4 E' 1475 1375   -21 E'   1396  
The calculated vibrational frequencies were scaled by 0.9326

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.