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

Compare vibrational frequencies in CCCBDB for CH3CONH2 (Acetamide)

LSDA/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3593 43 A 3550  
2 A 3450 -0 A 3450  
3 A 3047 80 A 2967  
4 A 3036 136 A 2900  
5 A 2944 84 A 2860  
6 A 1700 -33 A 1733  
7 A 1570 -30 A 1600  
8 A 1445 12 A 1433  
9 A 1419 -14 A 1433  
10 A 1364 -21 A 1385  
11 A 1350 31 A 1319  
12 A 1084 -50 A 1134  
13 A 1035 -5 A 1040  
14 A 960 -5 A 965  
15 A 852 -6 A 858  
16 A 697 72 A 625  
17 A 548 -0 A 548  
18 A 519 12 A 507  
19 A 496 69 A 427  
20 A 421 162 A 259  
21 A 37   A    
The calculated vibrational frequencies were scaled by 0.9797

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.