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

Compare vibrational frequencies in CCCBDB for C2H6O2S (Dimethyl sulfone)

MP2/CEP-121G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3063 45 A1 3018 B1 & B2 reversed
2 A1 2943 7 A1 2936  
3 A1 1425 -26 A1 1451  
4 A1 1334 -3 A1 1337  
5 A1 1084 -37 A1 1121  
6 A1 986 -27 A1 1013  
7 A1 660 -43 A1 703  
8 A1 441 -55 A1 496  
9 A1 252 -42 A1 294  
10 A2 3067 43 A2 3024  
11 A2 1415 10 A2 1405  
12 A2 918 -19 A2 937  
13 A2 277 -49 A2 326  
14 A2 170   A2   CH3 torsion
15 B1 3070 45 B1 3025 B1 & B2 reversed
16 B1 1430 2 B1 1428 B1 & B2 reversed
17 B1 1251 -18 B1 1269 B1 & B2 reversed
18 B1 971 -15 B1 986 B1 & B2 reversed
19 B1 336 -60 B1 396 B1 & B2 reversed
20 B1 212 -50 B1 262 B1 & B2 reversed
21 B2 3062 45 B2 3017 B1 & B2 reversed
22 B2 2941 5 B2 2936 B1 & B2 reversed
23 B2 1416 -22 B2 1438 B1 & B2 reversed
24 B2 1315 -7 B2 1322 B1 & B2 reversed
25 B2 928 -30 B2 958 B1 & B2 reversed
26 B2 728 -43 B2 771 B1 & B2 reversed
27 B2 425 -40 B2 465 B1 & B2 reversed
The calculated vibrational frequencies were scaled by 0.9528

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.