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

Compare vibrational frequencies in CCCBDB for C4H6O (Cyclobutanone)

BLYP/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2994 60 A1 2934  
2 A1 2965 73 A1 2892  
3 A1 1785 -29 A1 1814  
4 A1 1471 1 A1 1470  
5 A1 1419 18 A1 1401  
6 A1 1196 -95 A1 1291  
7 A1 929 -88 A1 1017  
8 A1 798 -50 A1 848  
9 A1 644 -23 A1 667  
10 A2 3006 27 A2 2979  
11 A2 1193 -3 A2 1196  
12 A2 925 -238 A2 1163  
13 A2 615 -294 A2 909  
14 B1 3040 35 B1 3005 B1 and B2 switched
15 B1 2999 20 B1 2979  
16 B1 1190 -19 B1 1209  
17 B1 1064 -9 B1 1073  
18 B1 727 -7 B1 734  
19 B1 387 -8 B1 395  
20 B1 23 -40 B1 63  
21 B2 2960 26 B2 2934 B1 and B2 switched
22 B2 1404 3 B2 1401  
23 B2 1227 -103 B2 1330  
24 B2 1150 -93 B2 1243  
25 B2 1014 -111 B2 1125  
26 B2 881 -76 B2 957  
27 B2 434 -23 B2 457  
The calculated vibrational frequencies were scaled by 0.9975

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.