National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 18October 2016
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
IXFeedback
XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

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XIII.F.2. (III.B.7.b.) (IV.C.7.) (XVIII.B.2.)

Bad vibrational frequency predictions

Calculated frequencies that differ from experiment by more than 400 cm-1 or have a ratio with experiment outside of 0.7 to 1.2 are listed

Calculated vibrational frequencies ("theory" in table) are calculated at B3LYP/cc-pVQZ
Calculated values were scaled by 0.9688.

Species Name mode Symmetry Experiment Theory difference ratio
CH3OH Methyl alcohol 12 A" 200 287 87 0.697
C2H4+ Ethylene cation 4 Au 84 -483 -567 -0.174
CHONH2 formamide 12 A" 289 224 -65 1.289
NaOH sodium hydroxide 3 Π 300 129 -171 2.328
CH2OH Hydroxymethyl radical 9 A 234 401 167 0.584
C2H3+ vinyl cation 2 A1 2217 2901 684 0.764
C3 carbon trimer 3 Πu 63 95 32 0.665
C2H4O4 Formic acid dimer 13 Au 1050 74 -976 14.231
H2OH2O water dimer 8 A' 103 157 54 0.654
H2POH Phosphinous acid 9 A" 375 257 -118 1.460
CH3BO Borane, methyloxo- 7 E 897 1413 516 0.635