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

Compare vibrational frequencies in CCCBDB for C2H5 (Ethyl radical)

B3LYP/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3044 11 A' 3033  
2 A' 3021 179 A' 2842  
3 A' 2916        
4 A' 1493        
5 A' 1431 -9 A' 1440  
6 A' 1400 34 A' 1366  
7 A' 1007 -131 A' 1138  
8 A' 968        
9 A' 380 -148 A' 528  
10 A" 3171 59 A" 3112  
11 A" 3091 104 A" 2987  
12 A" 1501 61 A" 1440  
13 A" 1156 -19 A" 1175  
14 A" 776        
15 A" 139        
The calculated vibrational frequencies were scaled by 0.8924

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.