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

Compare vibrational frequencies in CCCBDB for C3H6O (Oxetane)

PBEPBE/6-311G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2985 26 A1 2959  
2 A1 2916 -14 A1 2930  
3 A1 1483 10 A1 1473  
4 A1 1429 -32 A1 1461  
5 A1 1328 -14 A1 1342  
6 A1 1020 -114 A1 1134  
7 A1 898 -120 A1 1018  
8 A1 779 -129 A1 908  
9 A2 2947 -53 A2 3000  
10 A2 1192 -91 A2 1283  
11 A2 1119 -66 A2 1185  
12 A2 816 -170 A2 986  
13 B1 3041 34 B1 3007  
14 B1 2945 5 B1 2940  
15 B1 1146 -79 B1 1225  
16 B1 1102 -40 B1 1142  
17 B1 743 -93 B1 836  
18 B1 68 -22 B1 90  
19 B2 2904 -62 B2 2966  
20 B2 1453 -55 B2 1508  
21 B2 1263 -195 B2 1458  
22 B2 1214 -149 B2 1363  
23 B2 999 -229 B2 1228  
24 B2 929 -7 B2 936  
The calculated vibrational frequencies were scaled by 0.9909

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.