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

Compare vibrational frequencies in CCCBDB for C2H5F (fluoroethane)

MP2/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3106 103 A' 3003  
2 A' 2947 6 A' 2941  
3 A' 2911 -4 A' 2915  
4 A' 1517 38 A' 1479  
5 A' 1493 44 A' 1449  
6 A' 1407 12 A' 1395  
7 A' 1368 3 A' 1365  
8 A' 1124 16 A' 1108  
9 A' 1031 -17 A' 1048  
10 A' 874 -6 A' 880  
11 A' 366 -49 A' 415  
12 A" 3107 104 A" 3003  
13 A" 3003 0 A" 3003  
14 A" 1500 51 A" 1449  
15 A" 1243 -34 A" 1277  
16 A" 1112   A"   1048 questionable
17 A" 767 -43 A" 810  
18 A" 185 -58 A" 243  
The calculated vibrational frequencies were scaled by 0.8719

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.