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

Compare vibrational frequencies in CCCBDB for N2H4 (Hydrazine)

PBEPBE/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3508 110 A 3398  
2 A 3356 27 A 3329  
3 A 1672 30 A 1642  
4 A 1248 -27 A 1275  
5 A 1140 64 A 1076  
6 A 652 -128 A 780  
7 A 409 33 A 377  
8 B 3511 161 B 3350  
9 B 3372 58 B 3314  
10 B 1667 39 B 1628  
11 B 1236 -39 B 1275  
12 B 528 -438 B 966  
The calculated vibrational frequencies were scaled by 0.9862

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.