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

Compare vibrational frequencies in CCCBDB for C4H8O2 (1,4-Dioxane)

PBEPBE/6-311G*

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 Ag 2991 23 Ag 2968  
2 Ag 2865 9 Ag 2856  
3 Ag 1432 -12 Ag 1444  
4 Ag 1363 -34 Ag 1397  
5 Ag 1287 -18 Ag 1305  
6 Ag 1098 -30 Ag 1128  
7 Ag 985 -30 Ag 1015  
8 Ag 818 -19 Ag 837  
9 Ag 420 -15 Ag 435  
10 Ag 407 -17 Ag 424  
11 Au 2990 20 Au 2970  
12 Au 2856 -7 Au 2863  
13 Au 1419 -30 Au 1449  
14 Au 1332 -37 Au 1369  
15 Au 1236 -20 Au 1256  
16 Au 1090 -46 Au 1136  
17 Au 1065 -21 Au 1086  
18 Au 861 -20 Au 881  
19 Au 238 -50 Au 288  
20 Bg 2989 21 Bg 2968  
21 Bg 2868 12 Bg 2856  
22 Bg 1418 -41 Bg 1459  
23 Bg 1303 -32 Bg 1335  
24 Bg 1197 -20 Bg 1217  
25 Bg 1080 -30 Bg 1110  
26 Bg 829 -24 Bg 853  
27 Bg 464 -26 Bg 490  
28 Bu 2990 20 Bu 2970  
29 Bu 2874 11 Bu 2863  
30 Bu 1426 -31 Bu 1457  
31 Bu 1352 -26 Bu 1378  
32 Bu 1274 -17 Bu 1291  
33 Bu 1027 -25 Bu 1052  
34 Bu 858 -31 Bu 889  
35 Bu 582 -28 Bu 610  
36 Bu 262 -12 Bu 274  
The calculated vibrational frequencies were scaled by 0.9896

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.