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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 PBEPBE/cc-pVDZ
Calculated values were scaled by 0.9942.

Species Name mode Symmetry Experiment Theory difference ratio
C3H4O2 β–Propiolactone 21 A" 113 179 66 0.630
CH3COOH Acetic acid 18 A" 93 60 -33 1.545
CH3OH Methyl alcohol 12 A" 200 333 133 0.601
CH3COCH3 Acetone 12 A2 77 34 -43 2.270
C2H6O2S Dimethyl sulfone 13 A2 326 258 -68 1.265
C2H6O2S Dimethyl sulfone 20 B1 262 195 -67 1.342
C2H6O2S Dimethyl sulfone 19 B1 396 318 -78 1.245
CH3NH2 methyl amine 14 A" 1195 948 -247 1.261
CHONH2 formamide 12 A" 289 71 -218 4.060
CH3COCl Acetyl Chloride 15 A" 166 137 -29 1.207
CBr2F2 Methane, dibromodifluoro- 3 A1 140 315 175 0.444
C2F6 hexafluoroethane 4 A1u 68 39 -29 1.730
C3H6O 2-Propen-1-ol 22 A 377 310 -67 1.217
C3H6O 2-Propen-1-ol 24 A 188 113 -76 1.671
C3H6O 2-Propen-1-ol 21 A 554 434 -120 1.276
CH3OCHO methyl formate 11 A' 767 619 -148 1.239
CH3OCHO methyl formate 18 A" 130 101 -29 1.282
CH3OCHO methyl formate 17 A" 332 207 -125 1.601
C4H8O Furan, tetrahydro- 33 B 137 53 -84 2.605
C4H8O2 1,4-Dioxane 19 Au 288 238 -50 1.208
C5H8 Cyclopentene 18 A' 254 151 -103 1.681
C3H3NO Isoxazole 14 A" 1033 857 -176 1.205
C4H4N2 Pyridazine 13 A2 421 343 -78 1.228
CH2NN diazomethane 6 B1 406 323 -83 1.258
NH2CN cyanamide 5 A' 408 632 224 0.645
C4H6O2 2,3-Butanedione 13 Au 1111 891 -220 1.247
C4H6O2 2,3-Butanedione 21 Bg 240 87 -153 2.754
C4H6O2 2,3-Butanedione 9 Ag 614 503 -111 1.221
C5H12 Propane, 2,2-dimethyl- 12 T1 203 307 104 0.662
C2H3NO3 Oxamic acid 16 A" 984 800 -184 1.231
C2H3NO3 Oxamic acid 15 A' 328 254 -74 1.293
C2H3NO3 Oxamic acid 17 A" 815 675 -140 1.208
C2H3NO3 Oxamic acid 21 A" 162 74 -88 2.177
C2H3NO3 Oxamic acid 3 A' 2600 3454 854 0.753
C3O2 Carbon suboxide 7 Πu 61 94 33 0.648
C6H12 2-Butene, 2,3-dimethyl- 37 B2u 181 330 149 0.549
C5H8 1,4-Pentadiene 31 B 721 592 -129 1.219
C5H8 1,4-Pentadiene 33 B 331 103 -228 3.227
C5H8 1,4-Pentadiene 16 A 137 288 151 0.475
C6H10 1,5-Hexadiene 29 Bg 264 193 -71 1.371
C6H10 1,5-Hexadiene 14 Ag 351 255 -96 1.379
COBr2 Carbonic dibromide 6 B2 512 325 -187 1.573
COBr2 Carbonic dibromide 4 B1 757 497 -260 1.522
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 186 -41 1.222
CH3ONO Methyl nitrite 15 A" 186 131 -55 1.418
C3H6O2 1,3-Dioxolane 5 A 1480 2891 1411 0.512
C3H6O2 1,3-Dioxolane 4 A 1509 2928 1419 0.515
C3H6O2 1,3-Dioxolane 6 A 1361 2801 1440 0.486
C3H6O2 1,3-Dioxolane 13 A 658 1210 552 0.544
C2F2 difluoroacetylene 4 Πg 270 160 -110 1.685
SiF2 Silicon difluoride 2 A1 278 227 -51 1.226
C5H8 1,3-Pentadiene, (E)- 32 A" 129 208 79 0.619
C5H8 1,3-Pentadiene, (E)- 31 A" 361 257 -104 1.407
CH3 Methyl radical 2 A2" 606 454 -152 1.335
C4H9N Cyclobutylamine 21 A' 174 145 -29 1.204
CH2OH Hydroxymethyl radical 9 A 234 443 209 0.528
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 105 -253 3.424
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 873 -263 1.302
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 161 -103 1.644
SO2F2 Sulfuryl fluoride 9 B2 553 451 -102 1.227
SO2F2 Sulfuryl fluoride 4 A1 385 312 -73 1.236
SO2F2 Sulfuryl fluoride 5 A2 388 315 -73 1.231
SO2F2 Sulfuryl fluoride 7 B1 539 449 -90 1.200
OH- hydroxide anion 1 Σ 3738 3221 -517 1.161
C4H6 Methylenecyclopropane 17 B1 360 276 -84 1.306
C2Cl2+ dichloroacetylene cation 5 Πu 233 184 -49 1.269
ClFO3 Perchloryl fluoride 3 A1 549 447 -102 1.228
ClFO3 Perchloryl fluoride 5 E 589 478 -111 1.232
ClFO3 Perchloryl fluoride 6 E 405 316 -89 1.283
BF3+ boron trifluoride cation 3 E' 1662 1108 -554 1.500
BF3+ boron trifluoride cation 4 E' 411 268 -143 1.531
PF5 Phosphorus pentafluoride 7 E' 174 135 -39 1.285
H2SO4 Sulfuric acid 7 A 379 314 -64 1.204
SOCl2 thionyl chloride 4 A' 194 157 -37 1.237
SF4 Sulfur tetrafluoride 3 A1 532 433 -99 1.229
SF4 Sulfur tetrafluoride 7 B1 353 288 -65 1.228
SF4 Sulfur tetrafluoride 4 A1 228 185 -43 1.235
AsH3+ Arsine cation 2 A1 452 663 211 0.682
HSO3F Fluorosulfonic acid 8 A 551 452 -99 1.218
HSO3F Fluorosulfonic acid 11 A 390 312 -78 1.250
HSO3F Fluorosulfonic acid 7 A 562 466 -96 1.207
BrF5 bromine pentafluoride 6 B2 281 186 -95 1.511
BrF5 bromine pentafluoride 8 E 415 331 -84 1.254
BrF5 bromine pentafluoride 3 A1 369 297 -72 1.242
ClF3 Chlorine trifluoride 6 B2 442 332 -110 1.331
ClF3 Chlorine trifluoride 3 A1 328 234 -94 1.400
Cl2O Dichlorine monoxide 3 B2 686 549 -137 1.250
SO2Cl2 Sulfuryl chloride 3 A1 408 340 -68 1.201
SO2Cl2 Sulfuryl chloride 4 A1 218 177 -41 1.230
SO2Cl2 Sulfuryl chloride 7 B1 388 321 -67 1.208
NCl3 nitrogen trichloride 3 E 642 524 -118 1.226
PCl5 Phosphorus pentachloride 2 A1' 370 267 -103 1.385
PCl5 Phosphorus pentachloride 7 E' 100 76 -24 1.321
N2O4 Dinitrogen tetroxide 9 B2u 265 190 -75 1.398
N2O3 Dinitrogen trioxide 9 A" 63 146 83 0.433
C3 carbon trimer 3 Πu 63 91 28 0.696
F3PO Phosphoryl fluoride 5 E 482 401 -81 1.202
SiH- silicon monohydride anion 1 Σ 2175 1716 -459 1.268
ClONO2 Chlorine nitrate 7 A' 273 220 -53 1.240
B2H6 Diborane 14 B2u 368 285 -83 1.291
BrOBr Bromine oxide 3 B2 629 523 -106 1.202
GeH2 germylene 2 A1 916 1801 885 0.509
GeH2 germylene 1 A1 1856 902 -954 2.059
Mg2 Magnesium diatomic 1 Σg 51 103 52 0.494
ClS2 Sulfur chloride 1 A' 662 439 -223 1.507