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

Compare vibrational frequencies in CCCBDB for C4H6 (Methylenecyclopropane)

PBEPBE/6-311+G(3df,2p)

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3030 20 A1 3010  
2 A1 3013 11 A1 3002  
3 A1 1771 28 A1 1743  
4 A1 1418 -19 A1 1437  
5 A1 1380 -30 A1 1410  
6 A1 1040 4 A1 1036  
7 A1 980 -22 A1 1002  
8 A1 729 6 A1 723  
9 A2 3082 31 A2 3051  
10 A2 1117 -27 A2 1144  
11 A2 916 -21 A2 937  
12 A2 588 -28 A2 616  
13 B1 3095 24 B1 3071  
14 B1 1046 -26 B1 1072  
15 B1 871 -18 B1 889  
16 B1 720 -28 B1 748  
17 B1 275 -85 B1 360  
18 B2 3109 23 B2 3086  
19 B2 3013 14 B2 2999  
20 B2 1383 30 B2 1353  
21 B2 1097 -77 B2 1174  
22 B2 1019 -106 B2 1125  
23 B2 876 84 B2 792  
24 B2 342 52 B2 290  
The calculated vibrational frequencies were scaled by 0.9918

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.