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

Compare vibrational frequencies in CCCBDB for SF6 (Sulfur Hexafluoride)

MP4/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1g 653 -121 A1g 774  
2 Eg 658 16 Eg 642  
3 T1u 967 19 T1u 948  
4 T1u 451 -165 T1u 616  
5 T2g 383 -142 T2g 525  
6 T2u 250 -97 T2u 347  
The calculated vibrational frequencies were scaled by 0.9698

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.