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

Compare vibrational frequencies in CCCBDB for N2O3 (Dinitrogen trioxide)

B3LYP/aug-cc-pVDZ

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 1876 44 A' 1832  
2 A' 1668 16 A' 1652  
3 A' 1340 35 A' 1305  
4 A' 785 12 A' 773  
5 A' 639 12 A' 627  
6 A' 277 36 A' 241  
7 A' 204 -1 A' 205  
8 A" 449 35 A" 414  
9 A" 134 71 A" 63  
The calculated vibrational frequencies were scaled by 0.9704

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.