National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
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 Zn(CH3)2 (dimethyl zinc)


Frequency in cm-1
  Calculated   Experimental
Mode Number Symmetry Frequency diff Symmetry Frequency Comment
1 A1' 2932 32 A1' 2900  
2 A1' 1201 44 A1' 1157  
3 A1' 529 26 A1' 503  
4 A1" 31   A1"   torsion
5 A2" 2930 15 A2" 2915  
6 A2" 1200 17 A2" 1183  
7 A2" 598 -15 A2" 613  
8 E' 2996 30 E' 2966  
9 E' 1414 110 E' 1304  
10 E' 712 8 E' 704  
11 E' 91 -43 E' 134  
12 E" 2996 153 E" 2843  
13 E" 1408 -26 E" 1434  
14 E" 600 -20 E" 620  
The calculated vibrational frequencies were scaled by 0.9945

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.