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Compare vibrational frequencies in CCCBDB for SiCl4 (Silane, tetrachloro-)

BLYP/6-31G

17 05 22 16 49
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 329 -95 A1 424  
2 E 115 -35 E 150  
3 T2 513 -108 T2 621  
4 T2 176 -45 T2 221  
The calculated vibrational frequencies were scaled by 0.9924

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.
See section Calculated; Vibrations; Scale Factors; Scale factor uncertainty for information on where the above scaling factor is from.