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

Compare vibrational frequencies in CCCBDB for C8H8 (cubane)

MP2/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1g 3048 53 A1g 2995  
2 A1g 950 -52 A1g 1002  
3 A2u 3004 26 A2u 2978  
4 A2u 879 40 A2u 839  
5 Eg 1075 -8 Eg 1083  
6 Eg 879 -33 Eg 912  
7 Eu 974 -177 Eu 1151  
8 Eu 382 -235 Eu 617  
9 T1g 1111 -19 T1g 1130  
10 T1u 3024 46 T1u 2978  
11 T1u 1219 -11 T1u 1230  
12 T1u 799 -54 T1u 853  
13 T2g 3014 44 T2g 2970  
14 T2g 1125 -57 T2g 1182  
15 T2g 761 -60 T2g 821  
16 T2g 550 -115 T2g 665  
17 T2u 1007 -29 T2u 1036  
18 T2u 789 -40 T2u 829  
The calculated vibrational frequencies were scaled by 0.9568

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.