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

Compare vibrational frequencies in CCCBDB for C8H8 (cubane)

MP2=FULL/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1g 3028 33 A1g 2995  
2 A1g 944 -58 A1g 1002  
3 A2u 2984 6 A2u 2978  
4 A2u 874 35 A2u 839  
5 Eg 1069 -14 Eg 1083  
6 Eg 874 -38 Eg 912  
7 Eu 969 -182 Eu 1151  
8 Eu 379 -238 Eu 617  
9 T1g 1105 -25 T1g 1130  
10 T1u 3004 26 T1u 2978  
11 T1u 1211 -19 T1u 1230  
12 T1u 794 -59 T1u 853  
13 T2g 2994 24 T2g 2970  
14 T2g 1119 -63 T2g 1182  
15 T2g 757 -64 T2g 821  
16 T2g 548 -117 T2g 665  
17 T2u 1002 -34 T2u 1036  
18 T2u 784 -45 T2u 829  
The calculated vibrational frequencies were scaled by 0.9501

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.