National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 19April 2018
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

NIST policy on privacy, security, and accessibility.

Please rate our products
© 2013 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

Please send questions, comments, corrections, additions and suggestions to cccbdb@nist.gov.

return to home page

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 LSDA/6-31G**
Calculated values were scaled by 0.9813.

Species Name mode Symmetry Experiment Theory difference ratio
CH3OH Methyl alcohol 12 A" 200 339 139 0.590
C3H6O 2-Propen-1-ol 22 A 377 304 -73 1.241
C3H6O 2-Propen-1-ol 24 A 188 119 -69 1.586
C4H6O2 2,3-Butanedione 13 Au 1111 874 -237 1.272
C4H6O2 2,3-Butanedione 16 Au 48 -34 -82 -1.421
C4H6O2 2,3-Butanedione 21 Bg 240 47 -193 5.073
C5H12 Propane, 2,2-dimethyl- 12 T1 203 323 120 0.629
C2H3NO3 Oxamic acid 3 A' 2600 3424 824 0.759
C2H3NO3 Oxamic acid 15 A' 328 257 -71 1.279
C2H3NO3 Oxamic acid 16 A" 984 787 -197 1.250
C2H3NO3 Oxamic acid 21 A" 162 87 -75 1.868
C3H6O Oxetane 12 A2 986 800 -186 1.233
C3H6O Oxetane 18 B1 90 -63 -153 -1.431
C3O2 Carbon suboxide 7 Πu 61 139 78 0.437
HCNO fulminic acid 5 Π 224 42 -182 5.305
C5H8 1,4-Pentadiene 16 A 137 284 147 0.483
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 180 -47 1.259
CH3SSCH3 Disulfide, dimethyl 13 A 117 73 -44 1.596
C6H6 Benzvalene 10 A1 996 744 -252 1.339
C2F2 difluoroacetylene 4 Πg 270 166 -104 1.627
C6H8 (E)-hexa-1,3,5-triene 36 Bu 170 136 -34 1.252
H2CS- thioformaldehyde anion 4 B1 450 142 -308 3.163
CuO Copper Monoxide 1 Σ 640 931 291 0.687
SiF2+ Silicon difluoride cation 2 A1 350 272 -78 1.286
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 216 72 0.666
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 340 -116 1.340
CH3OO methylperoxy radical 12 A" 170 126 -44 1.351
CH3 Methyl radical 2 A2" 606 482 -124 1.257
CH2OH Hydroxymethyl radical 9 A 234 427 193 0.548
C6H8 (Z)-hexa-1,3,5-triene 11 A1 1136 875 -261 1.298
C6H8 (Z)-hexa-1,3,5-triene 19 A2 264 166 -98 1.594
C6H8 (Z)-hexa-1,3,5-triene 24 B1 358 109 -249 3.288
HCCN cyanomethylene 5 Π 129 -179 -308 -0.721
CHCl2 dichloromethyl radical 4 A' 190 280 90 0.679
C4H6 Methylenecyclopropane 17 B1 360 280 -80 1.285
C2Cl2 dichloroacetylene 4 Πg 333 245 -88 1.358
HClO4 perchloric acid 12 A" 191 127 -64 1.510
MgF2 Magnesium fluoride 3 Πu 165 134 -31 1.232
SF4 Sulfur tetrafluoride 4 A1 228 177 -51 1.290
CaF2 Calcium difluoride 2 A1 120 19 -101 6.250
OClO- Chlorine dioxide anion 2 A1 418 335 -83 1.249
N2O3 Dinitrogen trioxide 9 A" 63 151 88 0.417
SF5 Sulfur pentafluoride 9 E 387 307 -80 1.260
C3O Tricarbon monoxide 5 Π 109 192 83 0.567
C3 carbon trimer 3 Πu 63 137 74 0.461
ClOOCl Dichlorine dioxide 1 A 750 1155 405 0.650
SiH- silicon monohydride anion 1 Σ 2175 1752 -423 1.241
H3O+ hydronium cation 2 A1 954 693 -262 1.378
ZnH2 Zinc hydride 3 Πu 633 470 -163 1.347
C2H4O4 Formic acid dimer 2 Ag 2949 1897 -1052 1.555
C2H4O4 Formic acid dimer 18 Bu 2939 2067 -872 1.422
C2H4O4 Formic acid dimer 24 Bu 268 490 222 0.547
ClOO chloroperoxy radical 3 A' 201 316 115 0.637
B2H6 Diborane 14 B2u 369 262 -106 1.406
H2OH2O water dimer 6 A' 311 585 274 0.531
H2OH2O water dimer 7 A' 143 327 184 0.437
H2OH2O water dimer 10 A" 523 785 262 0.666
H2OH2O water dimer 11 A" 108 205 97 0.527
H2OH2O water dimer 12 A" 88 -206 -294 -0.428
H2POH Phosphinous acid 9 A" 375 244 -132 1.540
Mg2 Magnesium diatomic 1 Σg 51 119 68 0.430
ClOF3 Chlorine trifluoride oxide 6 A' 224 181 -43 1.239
ZnCH3 Zinc monomethyl 6 E 315 594 279 0.531
ClONO chlorine nitrite 5 A' 270 185 -85 1.462
ZnCN Zinc monocyanide 3 Π 212 -116 -328 -1.829
HSO3 HOSO2 3 A 1296 1047 -249 1.237