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

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

B3PW91/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3048 74 A1 2974  
2 A1 2184 -18 A1 2202  
3 A1 1469 33 A1 1436  
4 A1 1057 24 A1 1033  
5 A2 1353 20 A2 1333  
6 B1 2330 -683 B1 3013  
7 B1 1274 184 B1 1090  
8 B2 3140 906 B2 2234  
9 B2 1126 -108 B2 1234  
The calculated vibrational frequencies were scaled by 0.885

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.