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

Compare vibrational frequencies in CCCBDB for CHOCH(CH3)CH3 (Propanal, 2-methyl-)

MP2/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3022 48 A' 2974  
2 A' 3014 61 A' 2953  
3 A' 2962 22 A' 2940  
4 A' 2924 48 A' 2876  
5 A' 2778 21 A' 2757  
6 A' 1676 -76 A' 1752  
7 A' 1469 -5 A' 1474  
8 A' 1464 15 A' 1449  
9 A' 1377 -22 A' 1399  
10 A' 1359 -22 A' 1381  
11 A' 1269 -60 A' 1329  
12 A' 1147 -35 A' 1182  
13 A' 1136 -2 A' 1138  
14 A' 904 -18 A' 922  
15 A' 817 17 A' 800  
16 A' 517 -115 A' 632  
17 A' 335 -60 A' 395  
18 A' 316 44 A' 272  
19 A' 230 18 A' 212  
20 A" 3021 31 A" 2990  
21 A" 3010 28 A" 2982  
22 A" 2923 38 A" 2885  
23 A" 1452 -15 A" 1467  
24 A" 1449 -3 A" 1452  
25 A" 1355 -82 A" 1437  
26 A" 1300 10 A" 1290  
27 A" 1102 -7 A" 1109  
28 A" 955 -10 A" 965  
29 A" 915 -27 A" 942  
30 A" 896 -37 A" 933  
31 A" 315 -36 A" 351  
32 A" 210 -17 A" 227  
33 A" 57 -18 A" 75  
The calculated vibrational frequencies were scaled by 0.9365

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.