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

Compare vibrational frequencies in CCCBDB for N2O3 (Dinitrogen trioxide)

HF/6-31G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 1889 57 A' 1832  
2 A' 1774 122 A' 1652  
3 A' 1448 143 A' 1305  
4 A' 834 61 A' 773  
5 A' 780 153 A' 627  
6 A' 403 162 A' 241  
7 A' 335 130 A' 205  
8 A" 617 203 A" 414  
9 A" 104 41 A" 63  
The calculated vibrational frequencies were scaled by 0.8985

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.