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Compare vibrational frequencies in CCCBDB for N2O3 (Dinitrogen trioxide)

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

18 11 26 13 55
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency Scaled
Frequency
Harm.
diff
Fund.
diff
Symmetry Harmonic
Frequency
Fundamental
Frequency
Comment
1 A' 1871 1767   -65 A'   1832  
2 A' 1810 1709   57 A'   1652  
3 A' 1331 1257   -48 A'   1305  
4 A' 784 741   -32 A'   773  
5 A' 640 605   -22 A'   627  
6 A' 327 309   68 A'   241  
7 A' 192 181   -24 A'   205  
8 A" 451 426   12 A"   414  
9 A" 179 169   106 A"   63  
The calculated vibrational frequencies were scaled by 0.9445

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.
See section Calculated; Vibrations; Scale Factors; Scale factor uncertainty for information on where the above scaling factor is from.