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Compare vibrational frequencies in CCCBDB for HClO4 (perchloric acid)

BLYP/6-31G

17 05 22 16 49
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3303 -254 A' 3557  
2 A' 900 -407 A' 1307  
3 A' 717 -463 A' 1180  
4 A' 626 -412 A' 1038  
5 A' 414 -297 A' 711  
6 A' 282 -287 A' 569  
7 A' 260 -288 A' 548  
8 A' 169 -236 A' 405  
9 A" 718 -524 A" 1242  
10 A" 281 -295 A" 576  
11 A" 182 -226 A" 408  
12 A" 75i -266 A" 191  
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.