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

Compare vibrational frequencies in CCCBDB for HCNO (fulminic acid)

B3LYP/cc-pVDZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Σ 3413 77 Σ 3336  
2 Σ 2273 78 Σ 2196  
3 Σ 1273 19 Σ 1254  
4 Π 553 16 Π 537  
5 Π 97 -127 Π 224  
The calculated vibrational frequencies were scaled by 0.97

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.