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

Compare vibrational frequencies in CCCBDB for GeO2 (Germanium dioxide)

QCISD/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Σg 794 -76 Σg 870  
2 Σu 952 -110 Σu 1062  
3 Πu 150 -45 Πu 196  
The calculated vibrational frequencies were scaled by 0.9414

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.