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

Compare vibrational frequencies in CCCBDB for H2OH2O (water dimer)

CID/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3765 30 A' 3735  
2 A' 3683 23 A' 3660  
3 A' 3641 40 A' 3601  
4 A' 1690 74 A' 1616  
5 A' 1654 55 A' 1599  
6 A' 372 61 A' 311  
7 A' 193 50 A' 143  
8 A' 145 42 A' 103  
9 A" 3788 43 A" 3745  
10 A" 663 140 A" 523  
11 A" 158 50 A" 108  
12 A" 104 16 A" 88  
The calculated vibrational frequencies were scaled by 0.9291

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.