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Compare vibrational frequencies in CCCBDB for C5H8 (Cyclopentene)

HF/3-21G*

18 11 26 13 55
Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency Scaled
Frequency
Harm.
diff
Fund.
diff
Symmetry Harmonic
Frequency
Fundamental
Frequency
Comment
1 A' 3394 3064   -2 A'   3066  
2 A' 3286 2966   8 A'   2958  
3 A' 3250 2933   17 A'   2916  
4 A' 3230 2915   13 A'   2902  
5 A' 3201 2889   37 A'   2852  
6 A' 1830 1652   36 A'   1616  
7 A' 1668 1506   39 A'   1467  
8 A' 1643 1483   34 A'   1449  
9 A' 1453 1311   9 A'   1302  
10 A' 1373 1239   -45 A'   1284  
11 A' 1256 1134   -79 A'   1213  
12 A' 1180 1065   17 A'   1048  
13 A' 1010 912   -52 A'   964  
14 A' 930 839   -123 A'   962  
15 A' 881 795   -109 A'   904  
16 A' 807 729   37 A'   692  
17 A' 680 614   11 A'   603  
18 A' 127 114   -140 A'   254  
19 A" 3363 3036   -3 A"   3039  
20 A" 3242 2927   -40 A"   2967  
21 A" 3201 2889   -38 A"   2927  
22 A" 1650 1489   22 A"   1467  
23 A" 1507 1360   -72 A"   1432  
24 A" 1471 1328   -28 A"   1356  
25 A" 1446 1305   3 A"   1302  
26 A" 1350 1218   -79 A"   1297  
27 A" 1304 1177   -30 A"   1207  
28 A" 1131 1021   -92 A"   1113  
29 A" 1093 986   -96 A"   1082  
30 A" 982 886   -51 A"   937  
31 A" 931 840   40 A"   800  
32 A" 852 769   67 A"   702  
33 A" 421 380   -7 A"   387  
The calculated vibrational frequencies were scaled by 0.9026

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.
See section Calculated; Vibrations; Scale Factors; Scale factor uncertainty for information on where the above scaling factor is from.