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

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

MP2/CEP-121G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2995 21 A1 2974  
2 A1 2157 -45 A1 2202  
3 A1 1430 -6 A1 1436  
4 A1 1031 -2 A1 1033  
5 A2 1315 -18 A2 1333  
6 B1 2264 -749 B1 3013  
7 B1 1246 156 B1 1090  
8 B2 3057 823 B2 2234  
9 B2 1100 -134 B2 1234  
The calculated vibrational frequencies were scaled by 0.9528

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.