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 CCD/6-31+G**
Calculated values were scaled by 0.9423.

Species Name mode Symmetry Experiment Theory difference ratio
CH3OH Methyl alcohol 12 A" 200 305 105 0.657
C2H2 Acetylene 4 Πg 612 471 -141 1.298
HCN+ hydrogen cyanide cation 1 Σ 3050 3496 446 0.872
HCN+ hydrogen cyanide cation 2 Σ 1800 2708 908 0.665
CHONH2 formamide 12 A" 289 -166 -455 -1.734
CBr2F2 Methane, dibromodifluoro- 3 A1 140 327 187 0.428
C3F8 perfluoropropane 13 A2 276 217 -59 1.274
CH3COOCH3 methyl acetate 27 A" 110 57 -53 1.942
C9H8 Indene 40 A" 690 468 -223 1.476
C9H8 Indene 41 A" 549 413 -136 1.329
C6H4O2 parabenzoquinone 16 B2g 794 571 -223 1.391
C6H4O2 parabenzoquinone 17 B2g 241 94 -147 2.569
C6H4O2 parabenzoquinone 30 B3u 109 75 -33 1.446
C3H6O 2-Propen-1-ol 24 A 188 104 -84 1.801
C5H8 Cyclopentene 18 A' 254 163 -91 1.558
NH2CN cyanamide 5 A' 408 633 225 0.645
C4H6O2 2,3-Butanedione 21 Bg 240 111 -129 2.158
C6H5F Fluorobenzene 18 B1 685 479 -206 1.429
C3H6O Oxetane 18 B1 90 -73 -163 -1.227
C6H4F2 1,4-difluorobenzene 16 B2g 692 460 -232 1.503
C5H8 1,4-Pentadiene 16 A 137 284 147 0.483
HCCCl Chloroacetylene 5 Π 326 229 -97 1.423
COBr2 Carbonic dibromide 4 B1 757 508 -249 1.491
COBr2 Carbonic dibromide 6 B2 512 344 -168 1.488
C6H8 1,4-Cyclohexadiene 19 B1u 108 75 -33 1.450
C6H8 1,4-Cyclohexadiene 23 B2g 403 291 -112 1.383
C5H8O Methyl cyclopropyl ketone 4 A' 2970 1729 -1241 1.718
C5H8O Methyl cyclopropyl ketone 5 A' 2929 1433 -1496 2.044
C5H8O Methyl cyclopropyl ketone 9 A' 1386 1054 -332 1.315
C5H8O Methyl cyclopropyl ketone 10 A' 1352 952 -400 1.419
C5H8O Methyl cyclopropyl ketone 11 A' 1201 898 -303 1.337
C5H8O Methyl cyclopropyl ketone 12 A' 1170 727 -443 1.609
C5H8O Methyl cyclopropyl ketone 13 A' 1096 357 -739 3.068
C5H8O Methyl cyclopropyl ketone 30 A" 1028 3033 2005 0.339
C5H8O Methyl cyclopropyl ketone 31 A" 865 1424 559 0.607
C5H8O Methyl cyclopropyl ketone 32 A" 822 1176 354 0.699
C5H8O Methyl cyclopropyl ketone 33 A" 601 1020 419 0.589
C5H8O Methyl cyclopropyl ketone 34 A" 265 576 311 0.460
CaO Calcium monoxide 1 Σ 732 559 -173 1.309
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 213 69 0.675
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 319 -137 1.428
C5H8 1,3-Pentadiene, (Z)- 32 A" 171 92 -79 1.867
CN Cyano radical 1 Σ 2069 2503 434 0.826
C2H Ethynyl radical 3 Π 372 708 337 0.524
CH3 Methyl radical 2 A2" 606 454 -152 1.335
CH2OH Hydroxymethyl radical 9 A 234 412 178 0.568
CHCl2 dichloromethyl radical 4 A' 190 297 107 0.639
C2Cl2+ dichloroacetylene cation 4 Πg 318 232 -86 1.372
C2Cl2+ dichloroacetylene cation 5 Πu 233 167 -66 1.392
FOOF Perfluoroperoxide 1 A 1210 949 -261 1.275
AsH3+ Arsine cation 2 A1 452 665 213 0.680
NO Nitric oxide 1 Σ 1904 3050 1146 0.624
N2O3 Dinitrogen trioxide 9 A" 63 122 59 0.517
VO Vanadium monoxide 1 Σ 1011 1883 871 0.537
Li2O dilithium oxide 3 Πu 112 84 -28 1.330
FO Oxygen monofluoride 1 Σ 1053 2383 1330 0.442
C3 carbon trimer 3 Πu 63 -83 -146 -0.767
CaOH Calcium monohydroxide 2 Σ 353 554 201 0.637
CaOH Calcium monohydroxide 3 Π 609 415 -194 1.467
PS phosphorus sulfide 1 Σ 739 1107 367 0.668
SF5Cl sulfur chloropentafluoride 5 B1 625 452 -173 1.383
SF5Cl sulfur chloropentafluoride 7 B2 505 309 -196 1.632
SF5Cl sulfur chloropentafluoride 11 E 397 245 -152 1.619
PO Phosphorus monoxide 1 Σ 1233 2252 1019 0.548
PN+ phosphorus nitride cation 1 Σ 1200 2110 910 0.569
Cl3- trichloride anion 2 Σu 327 185 -142 1.766
H2OH2O water dimer 8 A' 103 154 51 0.669
H2OH2O water dimer 11 A" 108 160 52 0.674
H2OH2O water dimer 12 A" 88 132 44 0.665
F3- trifluoride anion 2 Σu 550 169 -381 3.255
H2POH Phosphinous acid 9 A" 375 258 -117 1.454
Mg2 Magnesium diatomic 1 Σg 51 15 -36 3.398
ZnCH3 Zinc monomethyl 6 E 315 599 284 0.526
CH3BO Borane, methyloxo- 7 E 897 1421 525 0.631