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

Compare vibrational frequencies in CCCBDB for CH3NH2 (methyl amine)

HF/6-31+G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3396 35 A' 3361  
2 A' 2913 -48 A' 2961  
3 A' 2838 18 A' 2820  
4 A' 1635 12 A' 1623  
5 A' 1469 -4 A' 1473  
6 A' 1436 6 A' 1430  
7 A' 1146 16 A' 1130  
8 A' 1034 -10 A' 1044  
9 A' 808 28 A' 780  
10 A" 3477 50 A" 3427  
11 A" 2946 -39 A" 2985  
12 A" 1485 -0 A" 1485  
13 A" 1316 -19 A" 1335  
14 A" 940   A"   1195 assignment questionable
15 A" 292 24 A" 268  
The calculated vibrational frequencies were scaled by 0.9042

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.