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Compare vibrational frequencies in CCCBDB for C2N2 (Cyanogen)

G2

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 Σg 2738 2738   408 Σg   2330  
2 Σg 928 928   82 Σg   846  
3 Σu 2543 2543   385 Σu   2158  
4 Πg 611 611   108 Πg   503  
5 Πu 279 279   45 Πu   234  
The calculated vibrational frequencies were scaled by 1

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.