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

Compare vibrational frequencies in CCCBDB for CHF2Cl (difluorochloromethane)

PBEPBE/3-21G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A' 3058 37 A' 3021  
2 A' 1234 -78 A' 1313  
3 A' 1076 -31 A' 1107  
4 A' 656 -156 A' 812 affected by fermi resonance 2nu6
5 A' 534 -62 A' 596  
6 A' 325 -88 A' 413  
7 A" 1351 0 A" 1351  
8 A" 1163 36 A" 1127  
9 A" 296 -70 A" 366  
The calculated vibrational frequencies were scaled by 0.9909

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.