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

Compare vibrational frequencies in CCCBDB for ONONO (Nitrosyl nitrite)

MP2/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 1603 -137 A1 1740  
2 A1 918 -55 A1 974  
3 A1 373 -22 A1 395  
4 A1 217        
5 A2 226 16 A2 210  
6 B1 128 -12 B1 140  
7 B2 1557 -140 B2 1697  
8 B2 659 -46 B2 705  
9 B2 257 -123 B2 380  
The calculated vibrational frequencies were scaled by 0.9365

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.