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

Compare vibrational frequencies in CCCBDB for CBr2F2 (Methane, dibromodifluoro-)

MP2=FULL/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3535 2445 A1 1090  
2 A 3402 2779 A1 623  
3 A 2864 2724 A1 140  
4 A 1659 1491 A1 168  
5 A 1620 1339 A2 281  
6 A 1409 256 B1 1153  
7 A 1215 846 B1 369  
8 A 1040 209 B2 831  
9 A 1015 780 B2 235  
10 A 622        
11 A 546        
12 A 407        
The calculated vibrational frequencies were scaled by 0.9548

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.