National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 17bSeptember 2015
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 CCSD(T)/cc-pVTZ
Calculated values were scaled by 0.9748.

Species Name mode Symmetry Experiment Theory difference ratio
CH3OH Methyl alcohol 12 A" 200 300 100 0.667
CHONH2 formamide 12 A" 289 -130 -419 -2.219
HCNO fulminic acid 5 Π 224 -204 -428 -1.101
C3H6O Oxetane 18 B1 90 -50 -140 -1.783
COBr2 Carbonic dibromide 4 B1 757 509 -248 1.486
COBr2 Carbonic dibromide 6 B2 512 345 -167 1.482
GeH3CH3 methyl germane 11 E 848 3057 2209 0.277
GeH3CH3 methyl germane 12 E 506 1434 928 0.353
CH3 Methyl radical 2 A2" 606 484 -122 1.252
CH2OH Hydroxymethyl radical 9 A 234 420 186 0.557
C2H3+ vinyl cation 2 A1 2217 3290 1073 0.674
CH3CO Acetyl radical 4 A' 1420 3060 1640 0.464
CHCl2 dichloromethyl radical 4 A' 190 294 104 0.645
C2Cl2+ dichloroacetylene cation 5 Πu 233 180 -53 1.296
AsH3+ Arsine cation 2 A1 452 681 229 0.664
N2O3 Dinitrogen trioxide 9 A" 63 143 80 0.440
SF5Cl sulfur chloropentafluoride 3 A1 602 394 -208 1.528
SF5Cl sulfur chloropentafluoride 8 E 909 629 -280 1.446
SF5Cl sulfur chloropentafluoride 11 E 397 261 -136 1.521
H2POH Phosphinous acid 9 A" 375 262 -113 1.433
Mg2 Magnesium diatomic 1 Σg 51 40 -11 1.279
CH3BO Borane, methyloxo- 7 E 897 1432 535 0.626