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Compare vibrational frequencies in CCCBDB for CH3CONH2 (Acetamide)

HF/6-31G**

18 11 26 13 55
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency Scaled
Frequency
Harm.
diff
Fund.
diff
Symmetry Harmonic
Frequency
Fundamental
Frequency
Comment
1 A 3993 3604   54 A   3550  
2 A 3851 3476   26 A   3450  
3 A 3321 2998   31 A   2967  
4 A 3258 2940   40 A   2900  
5 A 3195 2884   24 A   2860  
6 A 1984 1791   58 A   1733  
7 A 1779 1606   6 A   1600  
8 A 1612 1455   22 A   1433  
9 A 1600 1444   11 A   1433  
10 A 1550 1399   14 A   1385  
11 A 1455 1313   -6 A   1319  
12 A 1229 1109   -25 A   1134  
13 A 1161 1048   8 A   1040  
14 A 1071 966   1 A   965  
15 A 911 823   -35 A   858  
16 A 694 626   1 A   625  
17 A 599 541   -7 A   548  
18 A 559 505   -2 A   507  
19 A 448 404   -23 A   427  
20 A 127 115   -144 A   259  
21 A 19 17    A      
The calculated vibrational frequencies were scaled by 0.9026

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.
See section Calculated; Vibrations; Scale Factors; Scale factor uncertainty for information on where the above scaling factor is from.