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

Compare vibrational frequencies in CCCBDB for CH3SSCH3 (Disulfide, dimethyl)

mPW1PW91/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3091 101 A 2990  
2 A 3077 94 A 2983  
3 A 2927 14 A 2913  
4 A 1491 65 A 1426  
5 A 1480 61 A 1419  
6 A 1366 55 A 1311  
7 A 947 -8 A 955  
8 A 945 -4 A 949  
9 A 740 46 A 694  
10 A 536 27 A 509  
11 A 219 -21 A 240  
12 A 120 -14 A 134  
13 A 78 -39 A 117  
14 B 3091 101 B 2990  
15 B 3076 93 B 2983  
16 B 2927 12 B 2915  
17 B 1492 62 B 1430  
18 B 1478 63 B 1415  
19 B 1357 54 B 1303  
20 B 948 -7 B 955  
21 B 939 -10 B 949  
22 B 746 55 B 691  
23 B 249 -25 B 274  
24 B 130 -4 B 134  
The calculated vibrational frequencies were scaled by 0.8789

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.