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

Compare vibrational frequencies in CCCBDB for CH2D2 (methane-d2)

mPW1PW91/STO-3G

Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 3049 75 A1 2974  
2 A1 2185 -17 A1 2202  
3 A1 1467 31 A1 1436  
4 A1 1056 23 A1 1033  
5 A2 1351 18 A2 1333  
6 B1 2332 -681 B1 3013  
7 B1 1273 183 B1 1090  
8 B2 3142 908 B2 2234  
9 B2 1125 -109 B2 1234  
The calculated vibrational frequencies were scaled by 0.8789

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.