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

Compare vibrational frequencies in CCCBDB for CH3CH2CHO (Propanal)

MP2/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3102 121 A' 2981  
2 A' 2960 56 A' 2904  
3 A' 2945 50 A' 2895  
4 A' 2863 54 A' 2809  
5 A' 1544 -199 A' 1743  
6 A' 1513 53 A' 1460  
7 A' 1484 68 A' 1416  
8 A' 1413 23 A' 1390  
9 A' 1331 -45 A' 1376  
10 A' 1302 -33 A' 1335  
11 A' 1063 -30 A' 1093  
12 A' 968 -25 A' 993  
13 A' 808 -40 A' 848  
14 A' 588 -80 A' 668  
15 A' 210 -61 A' 271  
16 A" 3103 111 A" 2992  
17 A" 3053 111 A" 2942  
18 A" 1508 57 A" 1451  
19 A" 1239 -11 A" 1250  
20 A" 1067 -51 A" 1118  
21 A" 813 -79 A" 892  
22 A" 654 -6 A" 660  
23 A" 188 -32 A" 220  
24 A" 85 -50 A" 135  
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.