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

Compare vibrational frequencies in CCCBDB for C4H8O (Furan, tetrahydro-)

B3PW91/6-31G(2df,p)

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3000 38 A 2962  
2 A 2953 12 A 2941  
3 A 2937 24 A 2913  
4 A 2879 4 A 2875  
5 A 1474 -14 A 1488  
6 A 1433 -29 A 1462  
7 A 1350 -14 A 1365  
8 A 1287 -21 A 1308  
9 A 1213 -14 A 1227  
10 A 1151 -27 A 1178  
11 A 1125 -17 A 1142  
12 A 1006 -23 A 1029  
13 A 907 -12 A 919  
14 A 903 8 A 895  
15 A 816 -24 A 840  
16 A 651 -6 A 657  
17 A 237 -49 A 286  
18 A 3009 37 B 2972  
19 A 2952 18 B 2934  
20 A 2939 27 B 2912  
21 A 2873 15 B 2858  
22 A 1460 -17 B 1477  
23 A 1423 -27 B 1450  
24 A 1315 -19 B 1334  
25 A 1261 -31 B 1292  
26 A 1211 -33 B 1244  
27 A 1143 -19 B 1162  
28 A 1085 15 B 1070  
29 A 933 -22 B 955  
30 A 880 -30 B 910  
31 A 851 -14 B 865  
32 A 553 -38 B 591  
33 A 45 -92 B 137  
The calculated vibrational frequencies were scaled by 0.9614

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.