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

Compare vibrational frequencies in CCCBDB for C4H4N2 (Succinonitrile)

B1B95/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Ag 2963 16 Ag 2947 renumbered from paper
2 Ag 2143 -111 Ag 2254  
3 Ag 1422 -0 Ag 1422  
4 Ag 1309 -19 Ag 1328  
5 Ag 985 -38 Ag 1023  
6 Ag 891 82 Ag 809  
7 Ag 458 -50 Ag 508  
8 Ag 203 16 Ag 187  
9 Au 3061 76 Au 2985  
10 Au 1129 -68 Au 1197  
11 Au 721 -39 Au 760  
12 Au 351 -6 Au 357 from gauche form
13 Au 64   Au    
14 Bg 3050 68 Bg 2982  
15 Bg 1226 -0 Bg 1226  
16 Bg 974 23 Bg 951  
17 Bg 320 -67 Bg 387  
18 Bu 2969 4 Bu 2965  
19 Bu 2145 -110 Bu 2255  
20 Bu 1435 10 Bu 1425  
21 Bu 1211 -59 Bu 1270  
22 Bu 856 -61 Bu 917  
23 Bu 466 -60 Bu 526  
24 Bu 117   Bu    
The calculated vibrational frequencies were scaled by 0.883

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.