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

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

MP2/6-31G(2df,p)

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3605 2515 A1 1090  
2 A 3460 2837 A1 623  
3 A 2859 2719 A1 140  
4 A 1736 1568 A1 168  
5 A 1532 1251 A2 281  
6 A 1366 213 B1 1153  
7 A 1219 850 B1 369  
8 A 1012 181 B2 831  
9 A 999 764 B2 235  
10 A 617        
11 A 530        
12 A 41        
The calculated vibrational frequencies were scaled by 0.9445

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.