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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 B1B95/aug-cc-pVDZ
Calculated values were scaled by 0.9579.

Species Name mode Symmetry Experiment Theory difference ratio
C3H4O2 β–Propiolactone 21 A" 113 175 62 0.645
CH3CONH2 Acetamide 20 A 259 210 -49 1.234
CH3COOH Acetic acid 18 A" 93 70 -23 1.319
CH3OH Methyl alcohol 12 A" 200 298 98 0.671
C2H6O2S Dimethyl sulfone 13 A2 326 264 -62 1.236
C2H6O2S Dimethyl sulfone 20 B1 262 186 -76 1.407
C2H6O2S Dimethyl sulfone 19 B1 396 316 -80 1.252
CH3NH2 methyl amine 14 A" 1195 929 -266 1.287
CH3CHClCH3 Propane, 2-chloro- 27 A" 276 224 -52 1.229
CH3COCl Acetyl Chloride 15 A" 166 135 -31 1.227
CBr2F2 Methane, dibromodifluoro- 3 A1 140 329 189 0.426
C2F6 hexafluoroethane 4 A1u 68 56 -12 1.204
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 521 -111 1.212
CHOCH(CH3)CH3 Propanal, 2-methyl- 17 A' 395 326 -69 1.213
CHOCH(CH3)CH3 Propanal, 2-methyl- 33 A" 75 62 -13 1.207
CH3COOCH3 methyl acetate 26 A" 136 70 -66 1.945
CH3COOCH3 methyl acetate 27 A" 110 39 -71 2.798
C6H4O2 parabenzoquinone 30 B3u 109 87 -22 1.249
C3H6O 2-Propen-1-ol 22 A 377 312 -65 1.210
C3H6O 2-Propen-1-ol 24 A 188 109 -79 1.724
C3H6O 2-Propen-1-ol 21 A 554 428 -126 1.294
C5H12 Pentane 23 A2 131 103 -28 1.272
C3H2N2 Malononitrile 6 A1 167 138 -29 1.207
C4H8O Furan, tetrahydro- 33 B 137 59 -78 2.317
CH2C(CH3)CH3 1-Propene, 2-methyl- 15 A2 193 160 -33 1.208
C5H8 Cyclopentene 18 A' 254 142 -112 1.786
C4H6O2 2,3-Butanedione 13 Au 1111 899 -212 1.236
C4H6O2 2,3-Butanedione 21 Bg 240 152 -88 1.584
C4H6O2 2,3-Butanedione 9 Ag 614 505 -109 1.216
C4H2 Diacetylene 7 Πg 482 197 -285 2.441
C6H4 Benzyne 24 B2 472 364 -108 1.298
C5H12 Propane, 2,2-dimethyl- 12 T1 203 298 95 0.682
C2H3NO3 Oxamic acid 16 A" 984 806 -178 1.221
C2H3NO3 Oxamic acid 18 A" 745 614 -131 1.213
C2H3NO3 Oxamic acid 15 A' 328 250 -78 1.313
C2H3NO3 Oxamic acid 17 A" 815 653 -162 1.247
C2H3NO3 Oxamic acid 21 A" 162 71 -91 2.290
C2H3NO3 Oxamic acid 3 A' 2600 3464 864 0.751
C5H8 1,4-Pentadiene 31 B 721 588 -133 1.227
C5H8 1,4-Pentadiene 33 B 331 98 -233 3.364
C5H8 1,4-Pentadiene 16 A 137 284 147 0.483
COBr2 Carbonic dibromide 6 B2 512 340 -172 1.508
COBr2 Carbonic dibromide 4 B1 757 501 -256 1.510
CH3SSCH3 Disulfide, dimethyl 13 A 117 95 -22 1.230
C3H6O2 1,3-Dioxolane 5 A 1480 2907 1427 0.509
C3H6O2 1,3-Dioxolane 4 A 1509 2940 1431 0.513
C3H6O2 1,3-Dioxolane 6 A 1361 2858 1497 0.476
C3H6O2 1,3-Dioxolane 13 A 658 1217 559 0.541
C6H10 2-Hexyne 25 A' 115 94 -21 1.220
C6H10 2-Hexyne 38 A" 392 321 -71 1.220
C3H7N Cyclopropylamine 12 A' 989 809 -180 1.223
C6H8 1,3,5-Hexatriene, (E)- 36 Bu 170 141 -29 1.206
C4N2 2-Butynedinitrile 7 Πg 263 206 -57 1.277
CH3C(SCH3)HCH3 Propane, 2-(methylthio)- 37 A 215 174 -41 1.234
CH3OCH2CN Methoxyacetonitrile 15 A' 243 171 -72 1.419
CH3OCH2CN Methoxyacetonitrile 24 A" 113 84 -29 1.352
CH2OH Hydroxymethyl radical 9 A 234 404 170 0.579
SO2F2 Sulfuryl fluoride 5 A2 388 317 -71 1.225
C3H3 Propargyl radical 7 B1 490 403 -87 1.217
CHOCHCHCH3 2-Butenal 18 A' 230 190 -40 1.213
C4H6 Methylenecyclopropane 17 B1 360 272 -88 1.324
ClFO3 Perchloryl fluoride 6 E 405 330 -75 1.228
BF3+ boron trifluoride cation 4 E' 411 -182 -593 -2.252
BF3+ boron trifluoride cation 3 E' 1662 889 -773 1.870
SiF4 Silicon tetrafluoride 2 E 268 217 -51 1.234
AsH3+ Arsine cation 2 A1 452 666 214 0.678
HSO3F Fluorosulfonic acid 11 A 390 320 -70 1.218
BrF5 bromine pentafluoride 6 B2 281 211 -70 1.333
PCl5 Phosphorus pentachloride 7 E' 100 81 -19 1.236
PCl5 Phosphorus pentachloride 2 A1' 370 277 -93 1.335
N2O3 Dinitrogen trioxide 9 A" 63 140 77 0.450
C4 Carbon tetramer 4 Πg 323 225 -98 1.434
F3PO Phosphoryl fluoride 6 E 336 279 -57 1.202
SiH- silicon monohydride anion 1 Σ 2175 1770 -405 1.229
H3O+ hydronium 2 A1 954 782 -173 1.221
FO2 Dioxygen monofluoride 3 A' 376 126 -250 2.978
ClOO chloroperoxy radical 2 A' 414 291 -122 1.420
ClOO chloroperoxy radical 3 A' 201 114 -88 1.772
GeH2 germylene 2 A1 916 1821 905 0.503
GeH2 germylene 1 A1 1856 898 -958 2.066