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

Compare vibrational frequencies in CCCBDB for C2H3NO3 (Oxamic acid)

HF/aug-cc-pVDZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3670 330 A' 3340  
2 A' 3602 373 A' 3229  
3 A' 3471 871 A' 2600 hydrogen bonded
4 A' 1850 109 A' 1741  
5 A' 1759 72 A' 1687  
6 A' 1599 4 A' 1595  
7 A' 1441 -29 A' 1470  
8 A' 1320 -40 A' 1360  
9 A' 1198 -43 A' 1241  
10 A' 1089 5 A' 1084  
11 A' 804 -27 A' 831  
12 A' 622 -65 A' 687  
13 A' 536 -20 A' 556  
14 A' 401 -54 A' 455  
15 A' 269 -59 A' 328  
16 A" 852 -132 A" 984  
17 A" 650 -165 A" 815  
18 A" 622 -123 A" 745  
19 A" 470 -11 A" 481  
20 A" 358 43 A" 315  
21 A" 97 -65 A" 162  
The calculated vibrational frequencies were scaled by 0.9106

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.