National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 17bSeptember 2015
NIST Standard Reference Database 101
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
XOlder CCCBDB versions
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers

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

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


Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1 2987 13 A1 2974  
2 A1 2153 -49 A1 2202  
3 A1 1470 34 A1 1436  
4 A1 1054 21 A1 1033  
5 A2 1358 25 A2 1333  
6 B1 2245 11 B1 2234 B1 and B2 switched
7 B1 1269 35 B2 1234 B1 and B2 switched
8 B2 3035 22 B2 3013 B1 and B2 switched
9 B2 1118 28 B2 1090 B1 and B2 switched
The calculated vibrational frequencies were scaled by 0.9594

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.