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Compare vibrational frequencies in CCCBDB for CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

MP2=FULL/6-31G(2df,p)

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 A1 3290 3092   32 A1   3060  
2 A1 1634 1536   -48 A1   1584  
3 A1 1203 1130           
4 A1 658 618           
5 A1 120 113           
6 A2 914 859           
7 A2 403 379           
8 B1 712 669   -2409 B1   3079  
9 B2 3268 3072           
10 B2 1304 1226           
11 B2 831 781           
12 B2 500 470           
The calculated vibrational frequencies were scaled by 0.9399

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.