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

Compare vibrational frequencies in CCCBDB for C5H12 (Pentane)

MP2/6-31G**

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3014 41 A1 2973  
2 A1 2925 33 A1 2892  
3 A1 2921 55 A1 2866  
4 A1 2902 36 A1 2866  
5 A1 1470 -10 A1 1480  
6 A1 1457 -6 A1 1463  
7 A1 1444 -6 A1 1450  
8 A1 1374 -5 A1 1379  
9 A1 1320 -26 A1 1346  
10 A1 1126 -18 A1 1144  
11 A1 1023 -13 A1 1036  
12 A1 847 -20 A1 867  
13 A1 382 -19 A1 401  
14 A1 170 -9 A1 179  
15 A2 3013 46 A2 2967  
16 A2 2963 55 A2 2908  
17 A2 1462 -0 A2 1462  
18 A2 1283 -63 A2 1346  
19 A2 1227 -42 A2 1269  
20 A2 955 -38 A2 993  
21 A2 735 -31 A2 766  
22 A2 249 39 A2 210  
23 A2 103 -28 A2 131  
24 B1 3013 48 B1 2965  
25 B1 2975 45 B1 2930  
26 B1 2945 15 B1 2930  
27 B1 1461 -8 B1 1469  
28 B1 1280 -23 B1 1303  
29 B1 1174 4 B1 1170  
30 B1 834 -24 B1 858  
31 B1 700 -27 B1 727  
32 B1 241 26 B1 215  
33 B1 110 22 B1 88  
34 B2 3014 49 B2 2965  
35 B2 2924 45 B2 2879  
36 B2 2916 50 B2 2866  
37 B2 1466 -10 B2 1476  
38 B2 1447 -9 B2 1456  
39 B2 1370 -19 B2 1389  
40 B2 1362 -17 B2 1379  
41 B2 1239 -30 B2 1269  
42 B2 1051 -22 B2 1073  
43 B2 1010 -14 B2 1024  
44 B2 901 -9 B2 910  
45 B2 379 -27 B2 406  
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.