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

Compare vibrational frequencies in CCCBDB for C4H6 (Methylenecyclopropane)

B3LYP/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3014 4 A1 3010  
2 A1 2995 -7 A1 3002  
3 A1 1775 32 A1 1743  
4 A1 1446 9 A1 1437  
5 A1 1406 -4 A1 1410  
6 A1 1030 -6 A1 1036  
7 A1 1000 -2 A1 1002  
8 A1 717 -6 A1 723  
9 A2 3061 10 A2 3051  
10 A2 1135 -9 A2 1144  
11 A2 934 -3 A2 937  
12 A2 600 -16 A2 616  
13 B1 3074 3 B1 3071  
14 B1 1067 -5 B1 1072  
15 B1 879 -10 B1 889  
16 B1 737 -11 B1 748  
17 B1 277 -83 B1 360  
18 B2 3090 4 B2 3086  
19 B2 2994 -5 B2 2999  
20 B2 1412 59 B2 1353  
21 B2 1109 -65 B2 1174  
22 B2 1034 -91 B2 1125  
23 B2 871 79 B2 792  
24 B2 343 53 B2 290  
The calculated vibrational frequencies were scaled by 0.9663

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.