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

Compare vibrational frequencies in CCCBDB for CH3NH2 (methyl amine)

BLYP/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3350 -11 A' 3361  
2 A' 2971 10 A' 2961  
3 A' 2852 32 A' 2820  
4 A' 1675 52 A' 1623  
5 A' 1473 -0 A' 1473  
6 A' 1431 1 A' 1430  
7 A' 1151 21 A' 1130  
8 A' 1010 -34 A' 1044  
9 A' 852 72 A' 780  
10 A" 3423 -4 A" 3427  
11 A" 3006 21 A" 2985  
12 A" 1495 10 A" 1485  
13 A" 1334 -1 A" 1335  
14 A" 965   A"   1195 assignment questionable
15 A" 325 57 A" 268  
The calculated vibrational frequencies were scaled by 0.9975

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.