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

Compare vibrational frequencies in CCCBDB for CH3COCH3 (Acetone)

B3LYPultrafine/6-31G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3034 15 A1 3019  
2 A1 2923 -14 A1 2937  
3 A1 1747 16 A1 1731  
4 A1 1436 1 A1 1435  
5 A1 1352 -12 A1 1364  
6 A1 1050 -16 A1 1066  
7 A1 753 -24 A1 777  
8 A1 361 -24 A1 385  
9 A2 2971 8 A2 2963  
10 A2 1432 6 A2 1426  
11 A2 859 -18 A2 877  
12 A2 47 -30 A2 77  
13 B1 2978 6 B1 2972  
14 B1 1453 -1 B1 1454  
15 B1 1084 -7 B1 1091  
16 B1 466 -18 B1 484  
17 B1 132 6 B1 125  
18 B2 3033 14 B2 3019  
19 B2 2917 -20 B2 2937  
20 B2 1428 18 B2 1410  
21 B2 1354 -10 B2 1364  
22 B2 1193 -23 B2 1216  
23 B2 857 -34 B2 891  
24 B2 509 -21 B2 530  
The calculated vibrational frequencies were scaled by 0.958

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.