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

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

MP2/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A 3025 63 A 2962  
2 A 3003 62 A 2941  
3 A 2971 58 A 2913  
4 A 2941 66 A 2875  
5 A 1554 66 A 1488  
6 A 1511 49 A 1462  
7 A 1363 -1 A 1365  
8 A 1343 35 A 1308  
9 A 1232 5 A 1227  
10 A 1160 -18 A 1178  
11 A 1137 -5 A 1142  
12 A 996 -33 A 1029  
13 A 869 -50 A 919  
14 A 855 -40 A 895  
15 A 796 -44 A 840  
16 A 629 -28 A 657  
17 A 258 -28 A 286  
18 A 3037 65 B 2972  
19 A 3002 68 B 2934  
20 A 2972 60 B 2912  
21 A 2937 79 B 2858  
22 A 1542 65 B 1477  
23 A 1507 57 B 1450  
24 A 1335 1 B 1334  
25 A 1312 20 B 1292  
26 A 1239 -5 B 1244  
27 A 1130 -32 B 1162  
28 A 1019 -51 B 1070  
29 A 960 5 B 955  
30 A 866 -44 B 910  
31 A 864 -1 B 865  
32 A 555 -36 B 591  
33 A 26 -111 B 137  
The calculated vibrational frequencies were scaled by 0.9545

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.