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

Compare vibrational frequencies in CCCBDB for N2H4 (Hydrazine)

mPW1PW91/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3521 123 A 3398  
2 A 3381 52 A 3329  
3 A 1659 17 A 1642  
4 A 1237 -38 A 1275  
5 A 1143 67 A 1076  
6 A 647 -133 A 780  
7 A 415 39 A 377  
8 B 3523 173 B 3350  
9 B 3391 77 B 3314  
10 B 1652 24 B 1628  
11 B 1225 -50 B 1275  
12 B 505 -461 B 966  
The calculated vibrational frequencies were scaled by 0.9466

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.