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

Compare vibrational frequencies in CCCBDB for H2OH2O (water dimer)

HF/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3575 -160 A' 3735  
2 A' 3406 -254 A' 3660  
3 A' 3376 -225 A' 3601  
4 A' 1797 181 A' 1616  
5 A' 1753 154 A' 1599  
6 A' 385 74 A' 311  
7 A' 229 86 A' 143  
8 A' 198 95 A' 103  
9 A" 3607 -138 A" 3745  
10 A" 600 77 A" 523  
11 A" 237 129 A" 108  
12 A" 91 3 A" 88  
The calculated vibrational frequencies were scaled by 0.8165

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.