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

Compare vibrational frequencies in CCCBDB for C3H2N2 (Malononitrile)

MP3/6-31G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2937 2 A1 2935  
2 A1 2317 42 A1 2275  
3 A1 1422 27 A1 1395  
4 A1 870 -20 A1 890  
5 A1 555 -27 A1 582  
6 A1 136 -31 A1 167  
7 A2 1200 -20 A2 1220  
8 A2 337 -30 A2 367  
9 B1 2980 12 B1 2968  
10 B1 914 -19 B1 933  
11 B1 312 -25 B1 337  
12 B2 2313 38 B2 2275  
13 B2 1309 -9 B2 1318  
14 B2 958 -24 B2 982  
15 B2 335 -31 B2 366  
The calculated vibrational frequencies were scaled by 0.9386

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.