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

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

MP2/CEP-121G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3003 29 A' 2974  
2 A' 2996 43 A' 2953  
3 A' 2949 9 A' 2940  
4 A' 2890 14 A' 2876  
5 A' 2843 86 A' 2757  
6 A' 1538 -214 A' 1752  
7 A' 1497 23 A' 1474  
8 A' 1493 44 A' 1449  
9 A' 1419 20 A' 1399  
10 A' 1371 -10 A' 1381  
11 A' 1309 -20 A' 1329  
12 A' 1177 -5 A' 1182  
13 A' 1172 34 A' 1138  
14 A' 910 -12 A' 922  
15 A' 816 16 A' 800  
16 A' 513 -119 A' 632  
17 A' 332 -63 A' 395  
18 A' 319 47 A' 272  
19 A' 216 4 A' 212  
20 A" 3000 10 A" 2990  
21 A" 2987 5 A" 2982  
22 A" 2888 3 A" 2885  
23 A" 1483 16 A" 1467  
24 A" 1475 23 A" 1452  
25 A" 1401 -36 A" 1437  
26 A" 1328 38 A" 1290  
27 A" 1110 1 A" 1109  
28 A" 963 -2 A" 965  
29 A" 922 -20 A" 942  
30 A" 907 -26 A" 933  
31 A" 312 -39 A" 351  
32 A" 183 -44 A" 227  
33 A" 57 -18 A" 75  
The calculated vibrational frequencies were scaled by 0.976

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.