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

Compare vibrational frequencies in CCCBDB for CH2D2 (methane-d2)

B3LYP/CEP-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2996 22 A1 2974  
2 A1 2158 -44 A1 2202  
3 A1 1429 -7 A1 1436  
4 A1 1033 0 A1 1033  
5 A2 1311 -22 A2 1333  
6 B1 2257 -756 B1 3013  
7 B1 1252 162 B1 1090  
8 B2 3051 817 B2 2234  
9 B2 1103 -131 B2 1234  
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.