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

Compare vibrational frequencies in CCCBDB for C4H6 (Methylenecyclopropane)

PBEPBE/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3036 26 A1 3010  
2 A1 3012 10 A1 3002  
3 A1 1783 40 A1 1743  
4 A1 1427 -10 A1 1437  
5 A1 1387 -23 A1 1410  
6 A1 1045 9 A1 1036  
7 A1 989 -13 A1 1002  
8 A1 733 10 A1 723  
9 A2 3083 32 A2 3051  
10 A2 1119 -25 A2 1144  
11 A2 917 -20 A2 937  
12 A2 586 -30 A2 616  
13 B1 3095 24 B1 3071  
14 B1 1047 -25 B1 1072  
15 B1 855 -34 B1 889  
16 B1 722 -26 B1 748  
17 B1 274 -86 B1 360  
18 B2 3119 33 B2 3086  
19 B2 3012 13 B2 2999  
20 B2 1392 39 B2 1353  
21 B2 1097 -77 B2 1174  
22 B2 1015 -110 B2 1125  
23 B2 875 83 B2 792  
24 B2 337 47 B2 290  
The calculated vibrational frequencies were scaled by 0.9863

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.