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

Compare vibrational frequencies in CCCBDB for CH3CONH2 (Acetamide)

PBEPBE/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3610 60 A 3550  
2 A 3477 27 A 3450  
3 A 3034 67 A 2967  
4 A 3031 131 A 2900  
5 A 2954 94 A 2860  
6 A 1727 -6 A 1733  
7 A 1588 -12 A 1600  
8 A 1446 13 A 1433  
9 A 1426 -7 A 1433  
10 A 1347 -38 A 1385  
11 A 1301 -18 A 1319  
12 A 1087 -47 A 1134  
13 A 1011 -29 A 1040  
14 A 944 -21 A 965  
15 A 815 -43 A 858  
16 A 663 38 A 625  
17 A 520 -28 A 548  
18 A 505 -1 A 507  
19 A 414 -13 A 427  
20 A 170 -89 A 259  
21 A 25   A    
The calculated vibrational frequencies were scaled by 0.9896

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.