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

Compare vibrational frequencies in CCCBDB for CH2CF2 (Ethene, 1,1-difluoro-)

MP2/CEP-31G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3101 31 A1 3070  
2 A1 1646 -82 A1 1728  
3 A1 1381 21 A1 1360  
4 A1 794 -132 A1 926  
5 A1 456 -94 A1 550  
6 A2 680 -34 A2 714  
7 B1 749 -54 B1 803 B1 & B2 switched in 1974sve/kov
8 B1 477 -134 B1 611  
9 B2 3219 65 B2 3154  
10 B2 1167 -135 B2 1302  
11 B2 894 -61 B2 955  
12 B2 380 -58 B2 438  
The calculated vibrational frequencies were scaled by 0.9663

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.