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

Compare vibrational frequencies in CCCBDB for CH3SCH3 (Dimethyl sulfide)

PBEPBE/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3085 87 A1 2998  
2 A1 2975 45 A1 2930  
3 A1 1487 43 A1 1444  
4 A1 1346 15 A1 1331  
5 A1 1030 57 A1 973  
6 A1 617 -78 A1 695  
7 A1 232 -50 A1 282  
8 A2 3072 120 A2 2952  
9 A2 1470 50 A2 1420  
10 A2 929 10 A2 919  
11 A2 172        
12 B1 3068 98 B1 2970  
13 B1 1480 41 B1 1439  
14 B1 963 -10 B1 973  
15 B1 166 -16 B1 182  
16 B2 3085 87 B2 2998  
17 B2 2978 48 B2 2930  
18 B2 1477 33 B2 1444  
19 B2 1320 5 B2 1315  
20 B2 908 5 B2 903  
21 B2 656 -87 B2 743  
The calculated vibrational frequencies were scaled by 0.9909

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.