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

Compare vibrational frequencies in CCCBDB for C3H2N2 (Malononitrile)

MP2/6-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2939 4 A1 2935  
2 A1 2012 -263 A1 2275  
3 A1 1470 75 A1 1395  
4 A1 836 -54 A1 890  
5 A1 517 -65 A1 582  
6 A1 125 -42 A1 167  
7 A2 1225 5 A2 1220  
8 A2 288 -79 A2 367  
9 B1 2981 13 B1 2968  
10 B1 953 20 B1 933  
11 B1 266 -71 B1 337  
12 B2 2018 -257 B2 2275  
13 B2 1337 19 B2 1318  
14 B2 931 -51 B2 982  
15 B2 290 -76 B2 366  
The calculated vibrational frequencies were scaled by 0.9568

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.