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

Compare vibrational frequencies in CCCBDB for C2H2N4 (sym-tetrazine)

B1B95/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Ag 3124 114 Ag 3010  
2 Ag 1278 -137 Ag 1415  
3 Ag 921 -88 Ag 1009  
4 Ag 712 -24 Ag 736  
5 Au 303 -32 Au 335  
6 B1u 3122 36 B1u 3086  
7 B1u 1126 -78 B1u 1204  
8 B1u 997 -96 B1u 1093  
9 B2g 984 -10 B2g 994  
10 B2g 785 -16 B2g 801  
11 B2u 1372 -76 B2u 1448  
12 B2u 1037 -67 B2u 1104  
13 B2u 721 -162 B2u 883  
14 B3g 1393 -132 B3g 1525  
15 B3g 1270 -20 B3g 1290  
16 B3g 593 -47 B3g 640  
17 B3u 924 -5 B3u 929  
18 B3u 233 -21 B3u 254  
The calculated vibrational frequencies were scaled by 0.9567

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.