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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 B1B95/6-31G
Calculated values were scaled by 0.9537.

Species Name mode Symmetry Experiment Theory difference ratio
C3H4O2 β–Propiolactone 21 A" 113 172 59 0.656
CH3CONH2 Acetamide 20 A 259 403 144 0.642
CH3COOH Acetic acid 11 A' 657 545 -112 1.205
CH3COOH Acetic acid 18 A" 93 76 -17 1.222
CH3OH Methyl alcohol 12 A" 200 329 129 0.608
CH3SOCH3 Dimethyl sulfoxide 12 A' 308 228 -80 1.353
CH3SOCH3 Dimethyl sulfoxide 23 A" 333 215 -118 1.551
CH3SOCH3 Dimethyl sulfoxide 9 A' 1006 772 -234 1.303
CH3SOCH3 Dimethyl sulfoxide 11 A' 382 277 -105 1.379
C2H6O2S Dimethyl sulfone 13 A2 326 195 -131 1.676
C2H6O2S Dimethyl sulfone 20 B1 262 157 -105 1.665
C2H6O2S Dimethyl sulfone 19 B1 396 259 -137 1.526
C2H6O2S Dimethyl sulfone 27 B2 465 298 -167 1.561
C2H6O2S Dimethyl sulfone 7 A1 703 563 -140 1.249
C2H6O2S Dimethyl sulfone 9 A1 294 207 -87 1.421
C2H6O2S Dimethyl sulfone 17 B1 1269 1039 -230 1.222
C2H6O2S Dimethyl sulfone 6 A1 1013 792 -221 1.279
C2H6O2S Dimethyl sulfone 8 A1 496 337 -159 1.473
CH3NH2 methyl amine 14 A" 1195 936 -259 1.277
CH3NH2 methyl amine 9 A' 780 524 -256 1.489
CH3CH2NH2 Ethylamine 13 A' 773 560 -213 1.381
CHONH2 formamide 12 A" 289 524 235 0.551
HNCO Isocyanic acid 5 A' 577 458 -119 1.261
HNCO Isocyanic acid 6 A" 656 541 -116 1.214
HNCO Isocyanic acid 4 A' 777 540 -237 1.439
CH3SCH3 Dimethyl sulfide 15 B1 182 151 -31 1.204
CH3SCH3 Dimethyl sulfide 7 A1 282 230 -52 1.224
CH3CHClCH3 Propane, 2-chloro- 27 A" 276 224 -52 1.233
CH3COCl Acetyl Chloride 15 A" 166 130 -36 1.281
N(CH3)3 Trimethylamine 7 A1 367 289 -77 1.267
CBr2F2 Methane, dibromodifluoro- 3 A1 140 305 165 0.459
C2F6 hexafluoroethane 4 A1u 68 51 -17 1.324
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 522 -110 1.212
CHOCH(CH3)CH3 Propanal, 2-methyl- 17 A' 395 329 -66 1.202
CHOCH(CH3)CH3 Propanal, 2-methyl- 33 A" 75 54 -21 1.390
CH3COOCH3 methyl acetate 27 A" 110 54 -56 2.035
C3H6O 2-Propen-1-ol 22 A 377 308 -70 1.227
C3H6O 2-Propen-1-ol 24 A 188 102 -86 1.844
C3H6O 2-Propen-1-ol 21 A 554 434 -120 1.277
CH3OCHO methyl formate 18 A" 130 23 -107 5.599
C5H12 Pentane 23 A2 131 106 -25 1.241
C4H8O Furan, tetrahydro- 33 B 137 63 -74 2.166
CH2C(CH3)CH3 1-Propene, 2-methyl- 15 A2 193 159 -34 1.214
CH3CH2CHO Propanal 24 A" 135 106 -29 1.272
C4H9N Pyrrolidine 36 A" 65 45 -20 1.438
C4H8O2 1,4-Dioxane 19 Au 288 230 -58 1.252
CO2 Carbon dioxide 3 Πu 667 545 -122 1.223
C5H8 Cyclopentene 18 A' 254 130 -124 1.952
C2H4O3 trioxolane124 21 B 193 157 -36 1.231
N2H4 Hydrazine 12 B 966 495 -471 1.953
C4H6O2 2,3-Butanedione 21 Bg 240 55 -185 4.380
C4H6O2 2,3-Butanedione 16 Au 48 36 -12 1.316
C5H12 Propane, 2,2-dimethyl- 12 T1 203 291 88 0.698
C2H3NO3 Oxamic acid 16 A" 984 782 -202 1.258
C2H3NO3 Oxamic acid 15 A' 328 254 -74 1.291
C2H3NO3 Oxamic acid 17 A" 815 671 -144 1.214
C2H3NO3 Oxamic acid 21 A" 162 82 -80 1.972
C2H3NO3 Oxamic acid 3 A' 2600 3456 856 0.752
C3O2 Carbon suboxide 7 Πu 61 136 75 0.448
HCNO fulminic acid 5 Π 224 368 144 0.610
C5H8 1,4-Pentadiene 31 B 721 597 -124 1.207
C5H8 1,4-Pentadiene 33 B 331 95 -236 3.466
C5H8 1,4-Pentadiene 16 A 137 287 150 0.477
C6H10 1,5-Hexadiene 29 Bg 264 203 -61 1.299
C6H10 1,5-Hexadiene 14 Ag 351 280 -71 1.254
COBr2 Carbonic dibromide 6 B2 512 328 -184 1.563
COBr2 Carbonic dibromide 4 B1 757 491 -266 1.542
CH3ONO Methyl nitrite 15 A" 186 140 -46 1.328
CH3SSCH3 Disulfide, dimethyl 11 A 240 192 -48 1.253
CH3SSCH3 Disulfide, dimethyl 13 A 117 61 -56 1.930
CH3SSCH3 Disulfide, dimethyl 10 A 509 423 -86 1.204
CH3SSCH3 Disulfide, dimethyl 12 A 134 109 -25 1.230
CH3SSCH3 Disulfide, dimethyl 23 B 274 214 -60 1.282
C3H6O2 1,3-Dioxolane 5 A 1480 2939 1459 0.504
C3H6O2 1,3-Dioxolane 13 A 658 1198 540 0.549
C3H6O2 1,3-Dioxolane 4 A 1509 2939 1430 0.513
C3H6O2 1,3-Dioxolane 6 A 1361 2930 1569 0.465
C2F2 difluoroacetylene 4 Πg 270 197 -73 1.371
C3H7N Cyclopropylamine 12 A' 989 812 -177 1.218
C3H7N Cyclopropylamine 14 A' 762 524 -238 1.455
C6H8 1,3,5-Hexatriene, (E)- 36 Bu 170 141 -29 1.209
CaO Calcium monoxide 1 Σ 732 520 -212 1.407
GeO2 Germanium dioxide 3 Πu 196 129 -67 1.520
LiOH lithium hydroxide 3 Π 257 418 161 0.614
SiF2 Silicon difluoride 2 A1 345 276 -69 1.248
SiF2 Silicon difluoride 2 A1 278 216 -62 1.286
CCl2 dichloromethylene 2 A1 335 277 -58 1.211
CCl2 dichloromethylene 3 B2 758 599 -159 1.265
C5H10S 2H-Thiopyran, tetrahydro- 23 A' 194 155 -39 1.252
CH3OCH2CN Methoxyacetonitrile 15 A' 243 165 -78 1.475
CH3OCH2CN Methoxyacetonitrile 24 A" 113 80 -33 1.404
C5H8 1,3-Pentadiene, (E)- 32 A" 129 200 71 0.646
C5H8 1,3-Pentadiene, (E)- 31 A" 361 250 -111 1.447
C2H Ethynyl radical 3 Π 372 537 166 0.691
SF6 Sulfur Hexafluoride 6 T2u 347 211 -136 1.647
SF6 Sulfur Hexafluoride 1 A1g 774 595 -178 1.300
SF6 Sulfur Hexafluoride 4 T1u 616 380 -236 1.621
SF6 Sulfur Hexafluoride 5 T2g 525 316 -209 1.660
CH2OH Hydroxymethyl radical 9 A 234 385 151 0.608
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 99 -259 3.599
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 872 -264 1.303
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 145 -119 1.825
SO2F2 Sulfuryl fluoride 1 A1 1269 899 -370 1.412
SO2F2 Sulfuryl fluoride 3 A1 544 345 -199 1.575
SO2F2 Sulfuryl fluoride 6 B1 885 712 -173 1.242
SO2F2 Sulfuryl fluoride 9 B2 553 336 -217 1.645
SO2F2 Sulfuryl fluoride 4 A1 385 224 -161 1.721
SO2F2 Sulfuryl fluoride 2 A1 848 660 -188 1.285
SO2F2 Sulfuryl fluoride 5 A2 388 223 -165 1.741
SO2F2 Sulfuryl fluoride 7 B1 539 317 -222 1.701
SO2F2 Sulfuryl fluoride 8 B2 1502 1015 -487 1.480
NF2 Difluoroamino radical 2 A1 573 470 -103 1.219
CCl carbon monochloride 1 Σ 877 698 -179 1.257
SiH2Cl2 dichlorosilane 4 A1 188 153 -35 1.230
C4H6 Methylenecyclopropane 17 B1 360 295 -65 1.219
SeO2 Selenium dioxide 2 A1 373 308 -64 1.209
SO2 Sulfur dioxide 3 B2 1362 986 -376 1.381
SO2 Sulfur dioxide 1 A1 1151 885 -266 1.301
SO2 Sulfur dioxide 2 A1 518 377 -141 1.374
SO3 Sulfur trioxide 1 A1' 1065 758 -307 1.404
SO3 Sulfur trioxide 2 A2" 498 281 -217 1.770
SO3 Sulfur trioxide 3 E' 1391 970 -421 1.434
SO3 Sulfur trioxide 4 E' 530 337 -193 1.572
SeS- selenium monosulfide anion 1 Σ 469 390 -79 1.203
AlCl3 Aluminum trichloride 4 E' 150 125 -25 1.202
C2Cl2+ dichloroacetylene cation 5 Πu 233 168 -65 1.384
ClFO3 Perchloryl fluoride 3 A1 549 285 -264 1.927
ClFO3 Perchloryl fluoride 5 E 589 300 -289 1.965
ClFO3 Perchloryl fluoride 6 E 405 192 -213 2.107
ClFO3 Perchloryl fluoride 1 A1 1061 662 -399 1.603
ClFO3 Perchloryl fluoride 4 E 1315 765 -550 1.720
ClFO3 Perchloryl fluoride 2 A1 715 518 -197 1.379
SiO2 silicon dioxide 3 Πu 273 174 -99 1.570
BF3+ boron trifluoride cation 3 E' 1662 723 -939 2.299
BF3+ boron trifluoride cation 4 E' 411 -282 -693 -1.457
PF5 Phosphorus pentafluoride 1 A1' 816 654 -162 1.248
PF5 Phosphorus pentafluoride 7 E' 174 140 -34 1.244
PF5 Phosphorus pentafluoride 4 A2" 575 413 -162 1.391
PF5 Phosphorus pentafluoride 8 E" 520 353 -167 1.472
PF5 Phosphorus pentafluoride 6 E' 533 382 -151 1.396
HF Hydrogen fluoride 1 Σ 4138 3624 -515 1.142
NH3 Ammonia 2 A1 950 374 -576 2.538
H2SO4 Sulfuric acid 7 A 379 213 -166 1.778
H2SO4 Sulfuric acid 11 B 1157 942 -215 1.228
H2SO4 Sulfuric acid 13 B 558 329 -229 1.694
H2SO4 Sulfuric acid 3 A 1136 853 -283 1.332
H2SO4 Sulfuric acid 5 A 548 349 -199 1.571
H2SO4 Sulfuric acid 12 B 882 674 -207 1.308
H2SO4 Sulfuric acid 4 A 831 612 -220 1.359
H2SO4 Sulfuric acid 15 B 288 175 -113 1.644
H2SO4 Sulfuric acid 14 B 506 308 -198 1.643
H2SO4 Sulfuric acid 6 A 422 274 -147 1.537
H2SO4 Sulfuric acid 8 A 224 134 -90 1.672
H2SO4 Sulfuric acid 10 B 1452 1150 -303 1.263
SOCl2 thionyl chloride 2 A' 492 373 -119 1.317
SOCl2 thionyl chloride 4 A' 194 122 -72 1.592
SOCl2 thionyl chloride 3 A' 344 245 -99 1.404
SOCl2 thionyl chloride 5 A" 455 362 -93 1.258
SOCl2 thionyl chloride 1 A' 1251 958 -293 1.306
SOCl2 thionyl chloride 6 A" 284 207 -77 1.374
PCl3 Phosphorus trichloride 2 A1 252 195 -57 1.291
PCl3 Phosphorus trichloride 4 E 198 141 -57 1.408
H2O2 Hydrogen peroxide 4 A 371 78 -293 4.768
Cl2 Chlorine diatomic 1 Σg 560 459 -101 1.219
NF3 Nitrogen trifluoride 4 E 492 400 -92 1.229
PF3 Phosphorus trifluoride 4 E 344 246 -98 1.401
PF3 Phosphorus trifluoride 2 A1 487 350 -137 1.390
SF4 Sulfur tetrafluoride 1 A1 892 712 -179 1.252
SF4 Sulfur tetrafluoride 3 A1 532 374 -158 1.421
SF4 Sulfur tetrafluoride 9 B2 475 373 -102 1.274
SF4 Sulfur tetrafluoride 7 B1 353 280 -73 1.263
SF4 Sulfur tetrafluoride 4 A1 228 84 -144 2.711
SF4 Sulfur tetrafluoride 5 A2 412 343 -69 1.200
SiF4 Silicon tetrafluoride 1 A1 800 665 -135 1.203
SiF4 Silicon tetrafluoride 4 T2 389 309 -80 1.259
SiF4 Silicon tetrafluoride 2 E 268 203 -65 1.323
AsF5 Arsenic pentafluoride 6 E' 372 308 -64 1.208
AsF5 Arsenic pentafluoride 8 E" 386 319 -67 1.210
HSO3F Fluorosulfonic acid 6 A 823 629 -194 1.309
HSO3F Fluorosulfonic acid 8 A 551 323 -228 1.704
HSO3F Fluorosulfonic acid 2 A 1486 1126 -360 1.320
HSO3F Fluorosulfonic acid 3 A 1243 973 -270 1.278
HSO3F Fluorosulfonic acid 5 A 896 687 -209 1.304
HSO3F Fluorosulfonic acid 10 A 409 262 -147 1.559
HSO3F Fluorosulfonic acid 4 A 1150 872 -278 1.319
HSO3F Fluorosulfonic acid 9 A 518 322 -196 1.610
HSO3F Fluorosulfonic acid 11 A 390 219 -171 1.783
HSO3F Fluorosulfonic acid 7 A 562 344 -218 1.632
HSO3F Fluorosulfonic acid 12 A 266 148 -118 1.803
FNO3 Fluorine nitrate 7 A' 303 240 -63 1.262
BrF5 bromine pentafluoride 6 B2 281 178 -103 1.575
BrF5 bromine pentafluoride 2 A1 587 478 -109 1.228
BrF5 bromine pentafluoride 1 A1 683 553 -130 1.235
BrF5 bromine pentafluoride 4 B1 312 216 -96 1.447
BrF5 bromine pentafluoride 8 E 415 303 -112 1.370
BrF5 bromine pentafluoride 3 A1 369 276 -93 1.339
BrF5 bromine pentafluoride 9 E 237 156 -81 1.515
ClF3 Chlorine trifluoride 4 B1 328 230 -98 1.427
ClF3 Chlorine trifluoride 1 A1 752 623 -129 1.207
ClF3 Chlorine trifluoride 6 B2 442 290 -152 1.526
ClF3 Chlorine trifluoride 3 A1 328 211 -117 1.553
Cl2O Dichlorine monoxide 2 A1 296 245 -51 1.208
SO2Cl2 Sulfuryl chloride 1 A1 1205 844 -361 1.428
SO2Cl2 Sulfuryl chloride 3 A1 408 260 -148 1.567
SO2Cl2 Sulfuryl chloride 6 B1 586 406 -180 1.442
SO2Cl2 Sulfuryl chloride 9 B2 362 221 -141 1.640
SO2Cl2 Sulfuryl chloride 2 A1 577 397 -180 1.452
SO2Cl2 Sulfuryl chloride 4 A1 218 125 -93 1.743
SO2Cl2 Sulfuryl chloride 5 A2 282 166 -116 1.696
SO2Cl2 Sulfuryl chloride 7 B1 388 237 -151 1.640
SO2Cl2 Sulfuryl chloride 8 B2 1434 986 -448 1.454
ZnCN Zinc monocyanide 3 Π 212 150 -62 1.417
N2O Nitrous oxide 3 Π 589 443 -146 1.329
S2Cl2 Disulfur dichloride 4 A 95 75 -20 1.262
S2Cl2 Disulfur dichloride 2 A 466 383 -83 1.218
S2Cl2 Disulfur dichloride 6 B 244 180 -64 1.355
S2Cl2 Disulfur dichloride 3 A 202 155 -47 1.305
S2Cl2 Disulfur dichloride 1 A 546 436 -110 1.252
S2Cl2 Disulfur dichloride 5 B 461 383 -78 1.203
SiHCl3 Trichlorosilane 3 A1 254 205 -49 1.240
SiHCl3 Trichlorosilane 2 A1 499 415 -84 1.201
SiHCl3 Trichlorosilane 6 E 176 141 -35 1.247
Cl3PO Phosphoryl chloride 2 A1 481 368 -113 1.308
Cl3PO Phosphoryl chloride 3 A1 266 195 -71 1.362
Cl3PO Phosphoryl chloride 4 E 590 459 -131 1.285
Cl3PO Phosphoryl chloride 1 A1 1322 1030 -292 1.284
Cl3PO Phosphoryl chloride 5 E 333 241 -92 1.380
Cl3PO Phosphoryl chloride 6 E 187 134 -53 1.395
SiCl4 Silane, tetrachloro- 4 T2 221 179 -42 1.236
SiCl4 Silane, tetrachloro- 1 A1 424 348 -76 1.219
SiCl4 Silane, tetrachloro- 2 E 150 117 -33 1.284
PCl5 Phosphorus pentachloride 5 E' 592 463 -129 1.279
PCl5 Phosphorus pentachloride 6 E' 273 203 -70 1.344
PCl5 Phosphorus pentachloride 8 E" 261 199 -62 1.312
PCl5 Phosphorus pentachloride 2 A1' 370 242 -128 1.531
PCl5 Phosphorus pentachloride 4 A2" 299 236 -63 1.268
PCl5 Phosphorus pentachloride 1 A1' 395 309 -86 1.279
PCl5 Phosphorus pentachloride 3 A2" 465 387 -78 1.201
PCl5 Phosphorus pentachloride 7 E' 100 67 -33 1.501
OClO Chlorine dioxide 2 A1 448 285 -162 1.570
OClO Chlorine dioxide 3 B2 1110 727 -383 1.526
OClO Chlorine dioxide 1 A1 946 683 -263 1.385
N2O3 Dinitrogen trioxide 9 A" 63 142 79 0.445
SCl2 Sulfur dichloride 2 A1 208 152 -56 1.373
SCl2 Sulfur dichloride 3 B2 535 426 -109 1.257
SCl2 Sulfur dichloride 1 A1 525 432 -93 1.216
C3 carbon trimer 3 Πu 63 194 131 0.327
MgOH magnesium hydroxide 3 Π 188 354 166 0.531
PO2 Phosphorus dioxide 2 A1 397 317 -80 1.252
PO2 Phosphorus dioxide 3 B2 1328 884 -443 1.501
PO2 Phosphorus dioxide 1 A1 1076 847 -229 1.270
NCl nitrogen monochloride 1 Σ 828 681 -147 1.215
S3- Sulfur trimer anion 3 B2 594 468 -126 1.269
S3 Sulfur trimer 1 A1 581 482 -99 1.205
S3 Sulfur trimer 2 A1 281 205 -76 1.373
S3 Sulfur trimer 3 B2 680 536 -144 1.268
H2S2 HSSH 3 A 515 428 -86 1.201
F3PO Phosphoryl fluoride 6 E 336 225 -111 1.494
F3PO Phosphoryl fluoride 1 A1 1417 1122 -295 1.263
F3PO Phosphoryl fluoride 3 A1 472 343 -129 1.375
F3PO Phosphoryl fluoride 5 E 482 326 -156 1.479
F3PO Phosphoryl fluoride 2 A1 873 694 -179 1.259
AlFCl2 Aluminum dichloride fluoride 2 A1 450 372 -78 1.211
ND3 Ammonia-d3 2 A1 748 287 -461 2.608
SiCl2 Dichlorosilylene 2 A1 201 152 -49 1.324
AlCl Aluminum monochloride 1 Σ 482 400 -81 1.203
SiH- silicon monohydride anion 1 Σ 2175 1636 -539 1.329
HPO HPO 2 A' 1188 980 -208 1.212
SO Sulfur monoxide 1 Σ 1151 947 -204 1.215
SO+ sulfur monoxide cation 1 Σ 1360 1090 -270 1.247
SiCl Clorosilylidyne 1 Σ 536 438 -98 1.223
H3O+ hydronium 2 A1 954 620 -335 1.541
ZnH2 Zinc hydride 3 Πu 633 491 -142 1.289
ClONO2 Chlorine nitrate 7 A' 273 223 -50 1.223
SCl sulfur monochloride 1 Σ 575 468 -107 1.229
FO2 Dioxygen monofluoride 3 A' 376 192 -184 1.956
FO2 Dioxygen monofluoride 2 A' 579 338 -241 1.715
PF+ phosphorus monofluoride cation 1 Σ 1053 863 -191 1.221
PCl phosphorus chloride 1 Σ 577 445 -132 1.298
ClOO chloroperoxy radical 2 A' 414 249 -165 1.664
ClOO chloroperoxy radical 3 A' 201 122 -79 1.651
SiCl3 trichlorosilyl radical 1 A1 470 386 -84 1.219
BCl boron monochloride 1 Σ 840 682 -158 1.232
SSO Disulfur monoxide 1 A' 1166 897 -269 1.300
SSO Disulfur monoxide 3 A' 380 282 -98 1.349
SSO Disulfur monoxide 2 A' 679 529 -150 1.283
OBrO OBrO 2 A1 312 247 -65 1.265
OBrO OBrO 3 B2 849 656 -193 1.295
OBrO OBrO 1 A1 799 640 -159 1.248
S2 Sulfur diatomic 1 Σg 726 596 -129 1.217
GeH2 germylene 2 A1 916 1793 877 0.511
GeH2 germylene 1 A1 1856 914 -942 2.031
ClS2 Sulfur chloride 1 A' 662 530 -132 1.248
ClS2 Sulfur chloride 3 A' 196 162 -34 1.208
ClS2 Sulfur chloride 2 A' 450 355 -95 1.267
ZnCH3 Zinc monomethyl 6 E 315 619 304 0.509