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

Compare vibrational frequencies in CCCBDB for ZnCH2 (Zinc methylene)

BLYP/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3021 62 A1 2959  
2 A1 1377 35 A1 1342  
3 A1 695 182 A1 514  
4 B1 760 235 B1 525  
5 B2 3109 62 B2 3047  
6 B2 615 71 B2 544  
The calculated vibrational frequencies were scaled by 0.9945

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.