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

Compare vibrational frequencies in CCCBDB for N2O3 (Dinitrogen trioxide)

HF/aug-cc-pVTZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 1895 63 A' 1832  
2 A' 1738 86 A' 1652  
3 A' 1448 143 A' 1305  
4 A' 854 81 A' 773  
5 A' 783 156 A' 627  
6 A' 386 145 A' 241  
7 A' 324 119 A' 205  
8 A" 630 216 A" 414  
9 A" 109 46 A" 63  
The calculated vibrational frequencies were scaled by 0.9104

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.