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

Compare vibrational frequencies in CCCBDB for H2OH2O (water dimer)

MP2/CEP-121G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3693 -42 A' 3735  
2 A' 3566 -94 A' 3660  
3 A' 3440 -161 A' 3601  
4 A' 1630 14 A' 1616  
5 A' 1611 12 A' 1599  
6 A' 407 96 A' 311  
7 A' 218 75 A' 143  
8 A' 203 100 A' 103  
9 A" 3743 -2 A" 3745  
10 A" 780 257 A" 523  
11 A" 190 82 A" 108  
12 A" 141 53 A" 88  
The calculated vibrational frequencies were scaled by 0.976

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.