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IV.C.1. (XIII.D.1.)

Compare vibrational frequencies in CCCBDB for CH3OO (methylperoxy radical)

B3LYP/CEP-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3092 59 A' 3033  
2 A' 2965 11 A' 2954  
3 A' 1444 -9 A' 1453  
4 A' 1394 -14 A' 1408  
5 A' 1137 -46 A' 1183  
6 A' 1056 -61 A' 1117  
7 A' 838 -64 A' 902  
8 A' 431 -51 A' 482  
9 A" 3082 62 A" 3020  
10 A" 1427 -14 A" 1441  
11 A" 1072        
12 A" 104 -66 A" 170  
The calculated vibrational frequencies were scaled by 0.9684

See section XIII.C.3 List or set vibrational scaling factors to change the scale factors used here.
See section III.B.3.c Calculate a vibrational scaling factor for a set of molecules to determine the least squares best scaling factor.
See section III.B.3.b List of vibrational scaling factors and their uncertainties for information on where the above scaling factor is from.