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

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

MP2/cc-pVDZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3582 2492 A1 1090  
2 A 3438 2815 A1 623  
3 A 2861 2721 A1 140  
4 A 1754 1586 A1 168  
5 A 1533 1252 A2 281  
6 A 1364 211 B1 1153  
7 A 1228 859 B1 369  
8 A 1026 195 B2 831  
9 A 994 759 B2 235  
10 A 605        
11 A 538        
12 A 301        
The calculated vibrational frequencies were scaled by 0.9525

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.