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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 B1B95/3-21G
Calculated values were scaled by 0.9567.

Species Name mode Symmetry Experiment Theory difference ratio
CH3CONH2 Acetamide 20 A 259 392 133 0.661
CH3COOH Acetic acid 11 A' 657 539 -118 1.218
CH3OH Methyl alcohol 12 A" 200 368 168 0.543
CH3SOCH3 Dimethyl sulfoxide 12 A' 308 242 -66 1.271
CH3SOCH3 Dimethyl sulfoxide 23 A" 333 224 -109 1.489
CH3SOCH3 Dimethyl sulfoxide 11 A' 382 291 -91 1.314
CH3SOCH3 Dimethyl sulfoxide 22 A" 695 568 -127 1.225
CH3SOCH3 Dimethyl sulfoxide 10 A' 672 549 -123 1.224
C2H6O2S Dimethyl sulfone 13 A2 326 188 -138 1.736
C2H6O2S Dimethyl sulfone 20 B1 262 159 -103 1.647
C2H6O2S Dimethyl sulfone 19 B1 396 265 -131 1.494
C2H6O2S Dimethyl sulfone 27 B2 465 302 -163 1.538
C2H6O2S Dimethyl sulfone 7 A1 703 555 -148 1.268
C2H6O2S Dimethyl sulfone 9 A1 294 228 -66 1.287
C2H6O2S Dimethyl sulfone 26 B2 771 621 -150 1.242
C2H6O2S Dimethyl sulfone 8 A1 496 384 -112 1.293
CH3NH2 methyl amine 14 A" 1195 948 -247 1.260
CH3NH2 methyl amine 9 A' 780 647 -133 1.206
CHONH2 formamide 12 A" 289 494 206 0.584
HNCO Isocyanic acid 5 A' 577 413 -164 1.398
HNCO Isocyanic acid 4 A' 777 573 -203 1.354
CH3SCH3 Dimethyl sulfide 7 A1 282 225 -57 1.251
CH3COCl Acetyl Chloride 9 A' 445 370 -75 1.201
CCl2O Phosgene 5 B2 849 678 -171 1.253
CCl2O Phosgene 2 A1 567 464 -103 1.223
CHF2Cl difluorochloromethane 4 A' 812 672 -140 1.209
CHF2Cl difluorochloromethane 9 A" 366 302 -64 1.212
CHF2Cl difluorochloromethane 6 A' 413 334 -79 1.237
N(CH3)3 Trimethylamine 7 A1 367 304 -63 1.208
CBr2F2 Methane, dibromodifluoro- 3 A1 140 327 187 0.428
CFCl3 Trichloromonofluoromethane 2 A1 535 445 -90 1.202
CF2Cl2 difluorodichloromethane 3 A1 458 378 -80 1.212
CF2Cl2 difluorodichloromethane 6 B1 902 746 -156 1.210
CF2Cl2 difluorodichloromethane 9 B2 446 361 -85 1.235
CF2Cl2 difluorodichloromethane 7 B1 437 363 -74 1.203
CF3Cl Methane, chlorotrifluoro- 3 A1 476 385 -91 1.236
C2F6 hexafluoroethane 4 A1u 68 55 -13 1.232
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 517 -115 1.222
CHOCH(CH3)CH3 Propanal, 2-methyl- 17 A' 395 328 -67 1.205
C3H6O 2-Propen-1-ol 22 A 377 292 -85 1.290
C3H6O 2-Propen-1-ol 24 A 188 100 -88 1.884
C3H6O 2-Propen-1-ol 21 A 554 440 -114 1.259
C2H2O2 Ethanedial 7 Au 127 195 68 0.653
C4H8O Furan, tetrahydro- 33 B 137 55 -82 2.500
C4H9N Pyrrolidine 36 A" 65 28 -37 2.313
C4H8O2 1,4-Dioxane 19 Au 288 219 -69 1.313
C5H8 Cyclopentene 18 A' 254 133 -121 1.912
CH2N4 1H-Tetrazole 11 A' 925 763 -162 1.212
N2H4 Hydrazine 12 B 966 789 -177 1.224
N2H4 Hydrazine 6 A 780 596 -184 1.310
C4H6O2 2,3-Butanedione 21 Bg 240 105 -135 2.288
C2N2 Cyanogen 4 Πg 503 756 253 0.665
C5H12 Propane, 2,2-dimethyl- 12 T1 203 311 108 0.653
C2H3NO3 Oxamic acid 15 A' 328 246 -82 1.334
C2H3NO3 Oxamic acid 17 A" 815 668 -147 1.221
C2H3NO3 Oxamic acid 21 A" 162 116 -46 1.394
C2H3NO3 Oxamic acid 3 A' 2600 3375 775 0.770
C3O2 Carbon suboxide 7 Πu 61 145 84 0.420
HCNO fulminic acid 5 Π 224 528 304 0.424
Zn(CH3)2 dimethyl zinc 11 E' 134 -99 -233 -1.359
C5H8 1,4-Pentadiene 31 B 721 593 -128 1.215
C5H8 1,4-Pentadiene 33 B 331 93 -238 3.558
C5H8 1,4-Pentadiene 17 A 102 80 -22 1.276
C5H8 1,4-Pentadiene 16 A 137 299 162 0.459
C6H10 1,5-Hexadiene 29 Bg 264 188 -76 1.401
C6H10 1,5-Hexadiene 14 Ag 351 283 -68 1.241
CH2FCl fluorochloromethane 6 A' 385 314 -71 1.226
CH2FCl fluorochloromethane 5 A' 760 619 -141 1.228
COBr2 Carbonic dibromide 6 B2 512 339 -173 1.512
COBr2 Carbonic dibromide 4 B1 757 521 -236 1.452
CH3SSCH3 Disulfide, dimethyl 11 A 240 189 -51 1.268
CH3SSCH3 Disulfide, dimethyl 13 A 117 95 -22 1.232
CH3SSCH3 Disulfide, dimethyl 10 A 509 418 -91 1.217
CH3SSCH3 Disulfide, dimethyl 23 B 274 224 -50 1.223
C3H6O2 1,3-Dioxolane 5 A 1480 2932 1452 0.505
C3H6O2 1,3-Dioxolane 4 A 1509 2939 1430 0.513
C3H6O2 1,3-Dioxolane 6 A 1361 2922 1561 0.466
C3H6O2 1,3-Dioxolane 13 A 658 1197 539 0.550
C3H7N Cyclopropylamine 12 A' 989 788 -201 1.255
C3H7N Cyclopropylamine 14 A' 762 627 -135 1.215
C4N2 2-Butynedinitrile 6 Πg 504 909 405 0.554
C4N2 2-Butynedinitrile 8 Πu 472 683 211 0.691
LiOH lithium hydroxide 3 Π 257 410 153 0.626
CCl2 dichloromethylene 2 A1 335 271 -65 1.239
CCl2 dichloromethylene 3 B2 758 576 -182 1.316
C5H10S 2H-Thiopyran, tetrahydro- 23 A' 194 157 -37 1.238
C5H10 Cyclopropane, 1,1-dimethyl- 39 B2 392 325 -67 1.204
CH3OCH2CN Methoxyacetonitrile 15 A' 243 176 -67 1.384
CH3OCH2CN Methoxyacetonitrile 24 A" 113 87 -26 1.299
C5H8 1,3-Pentadiene, (E)- 32 A" 129 199 70 0.649
C5H8 1,3-Pentadiene, (E)- 31 A" 361 246 -115 1.469
C2H Ethynyl radical 3 Π 372 542 171 0.685
CH3 Methyl radical 2 A2" 606 465 -141 1.304
SF6 Sulfur Hexafluoride 6 T2u 347 226 -121 1.533
SF6 Sulfur Hexafluoride 4 T1u 616 418 -198 1.473
SF6 Sulfur Hexafluoride 5 T2g 525 347 -178 1.515
CH2OH Hydroxymethyl radical 9 A 234 425 191 0.551
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 100 -258 3.596
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 864 -272 1.315
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 145 -119 1.818
CCl3 Trichloromethyl radical 3 E 898 747 -151 1.202
OH Hydroxyl radical 1 Σ 3738 3155 -582 1.185
OH+ hydoxyl cation 1 Σ 3113 2575 -538 1.209
NF2 Difluoroamino radical 2 A1 573 455 -118 1.258
CCl carbon monochloride 1 Σ 877 651 -226 1.347
SiH2Cl2 dichlorosilane 7 B1 602 498 -104 1.210
SiH2Cl2 dichlorosilane 3 A1 527 439 -88 1.200
SO2 Sulfur dioxide 3 B2 1362 1092 -270 1.247
SO2 Sulfur dioxide 1 A1 1151 940 -211 1.225
SO2 Sulfur dioxide 2 A1 518 414 -104 1.250
SO3 Sulfur trioxide 1 A1' 1065 826 -239 1.290
SO3 Sulfur trioxide 2 A2" 498 306 -192 1.628
SO3 Sulfur trioxide 3 E' 1391 1091 -300 1.276
SO3 Sulfur trioxide 4 E' 530 389 -141 1.363
SeS Selenium monosulfide 1 Σ 556 447 -109 1.243
C2Cl2 dichloroacetylene 4 Πg 333 600 267 0.555
C2Cl2+ dichloroacetylene cation 4 Πg 318 519 201 0.612
ClFO3 Perchloryl fluoride 3 A1 549 322 -227 1.705
ClFO3 Perchloryl fluoride 5 E 589 344 -245 1.712
ClFO3 Perchloryl fluoride 6 E 405 224 -181 1.807
ClFO3 Perchloryl fluoride 1 A1 1061 720 -341 1.474
ClFO3 Perchloryl fluoride 4 E 1315 871 -444 1.509
ClFO3 Perchloryl fluoride 2 A1 715 548 -167 1.305
SiO2 silicon dioxide 3 Πu 273 119 -153 2.281
BF3+ boron trifluoride cation 3 E' 1662 884 -778 1.880
BF3+ boron trifluoride cation 4 E' 411 -141 -552 -2.918
NaBr Sodium Bromide 1 Σ 302 250 -52 1.207
PF5 Phosphorus pentafluoride 4 A2" 575 452 -123 1.271
PF5 Phosphorus pentafluoride 8 E" 520 387 -133 1.343
PF5 Phosphorus pentafluoride 6 E' 533 419 -114 1.273
HF Hydrogen fluoride 1 Σ 4138 3535 -603 1.171
NH3 Ammonia 2 A1 950 682 -268 1.393
H2SO4 Sulfuric acid 7 A 379 248 -130 1.526
H2SO4 Sulfuric acid 13 B 558 375 -183 1.487
H2SO4 Sulfuric acid 5 A 548 405 -143 1.355
H2SO4 Sulfuric acid 4 A 831 673 -158 1.235
H2SO4 Sulfuric acid 15 B 288 205 -83 1.407
H2SO4 Sulfuric acid 14 B 506 360 -146 1.405
H2SO4 Sulfuric acid 6 A 422 351 -71 1.201
H2SO4 Sulfuric acid 8 A 224 160 -64 1.398
H2SO4 Sulfuric acid 10 B 1452 1202 -251 1.209
HNO3 Nitric acid 7 A' 579 473 -106 1.223
SOCl2 thionyl chloride 2 A' 492 375 -117 1.311
SOCl2 thionyl chloride 4 A' 194 112 -82 1.729
SOCl2 thionyl chloride 3 A' 344 240 -104 1.431
SOCl2 thionyl chloride 5 A" 455 366 -89 1.242
SOCl2 thionyl chloride 1 A' 1251 1040 -211 1.202
SOCl2 thionyl chloride 6 A" 284 203 -81 1.397
PCl3 Phosphorus trichloride 1 A1 504 414 -90 1.218
PCl3 Phosphorus trichloride 2 A1 252 184 -68 1.367
PCl3 Phosphorus trichloride 4 E 198 138 -60 1.432
H2O2 Hydrogen peroxide 4 A 371 77 -294 4.821
Cl2 Chlorine diatomic 1 Σg 560 458 -102 1.223
F2O Difluorine monoxide 2 A1 461 382 -79 1.206
NF3 Nitrogen trifluoride 2 A1 647 525 -122 1.233
NF3 Nitrogen trifluoride 4 E 492 386 -106 1.274
PF3 Phosphorus trifluoride 4 E 344 279 -65 1.232
PF3 Phosphorus trifluoride 2 A1 487 394 -93 1.237
SF4 Sulfur tetrafluoride 3 A1 532 414 -118 1.284
SF4 Sulfur tetrafluoride 4 A1 228 121 -107 1.891
AlF3 Aluminum trifluoride 2 A2" 297 246 -51 1.209
AsF5 Arsenic pentafluoride 7 E' 123 102 -21 1.202
AsH3+ Arsine cation 2 A1 452 647 195 0.698
HSO3F Fluorosulfonic acid 8 A 551 367 -184 1.503
HSO3F Fluorosulfonic acid 2 A 1486 1201 -285 1.237
HSO3F Fluorosulfonic acid 10 A 409 296 -113 1.380
HSO3F Fluorosulfonic acid 9 A 518 354 -164 1.463
HSO3F Fluorosulfonic acid 11 A 390 250 -140 1.563
HSO3F Fluorosulfonic acid 7 A 562 395 -167 1.423
HSO3F Fluorosulfonic acid 12 A 266 192 -74 1.383
FNO Nitrosyl fluoride 1 A' 1844 1505 -339 1.225
BrF5 bromine pentafluoride 6 B2 281 159 -122 1.770
BrF5 bromine pentafluoride 4 B1 312 230 -82 1.357
BrF5 bromine pentafluoride 8 E 415 291 -124 1.426
BrF5 bromine pentafluoride 3 A1 369 289 -80 1.276
BrF5 bromine pentafluoride 9 E 237 166 -71 1.430
ClF3 Chlorine trifluoride 4 B1 328 239 -89 1.373
ClF3 Chlorine trifluoride 1 A1 752 613 -139 1.226
ClF3 Chlorine trifluoride 6 B2 442 268 -174 1.647
ClF3 Chlorine trifluoride 3 A1 328 208 -120 1.575
SO2Cl2 Sulfuryl chloride 1 A1 1205 926 -279 1.302
SO2Cl2 Sulfuryl chloride 3 A1 408 266 -142 1.534
SO2Cl2 Sulfuryl chloride 6 B1 586 405 -181 1.446
SO2Cl2 Sulfuryl chloride 9 B2 362 214 -148 1.693
SO2Cl2 Sulfuryl chloride 2 A1 577 426 -151 1.355
SO2Cl2 Sulfuryl chloride 4 A1 218 120 -98 1.823
SO2Cl2 Sulfuryl chloride 5 A2 282 155 -127 1.820
SO2Cl2 Sulfuryl chloride 7 B1 388 234 -154 1.658
SO2Cl2 Sulfuryl chloride 8 B2 1434 1103 -331 1.300
S2Cl2 Disulfur dichloride 4 A 95 72 -23 1.327
S2Cl2 Disulfur dichloride 2 A 466 383 -83 1.217
S2Cl2 Disulfur dichloride 6 B 244 172 -72 1.420
S2Cl2 Disulfur dichloride 3 A 202 147 -55 1.377
S2Cl2 Disulfur dichloride 1 A 546 412 -134 1.324
SiHCl3 Trichlorosilane 3 A1 254 203 -51 1.253
SiHCl3 Trichlorosilane 2 A1 499 414 -85 1.204
Cl3PO Phosphoryl chloride 2 A1 481 355 -126 1.355
Cl3PO Phosphoryl chloride 3 A1 266 187 -79 1.424
Cl3PO Phosphoryl chloride 4 E 590 439 -151 1.345
Cl3PO Phosphoryl chloride 5 E 333 247 -86 1.350
Cl3PO Phosphoryl chloride 6 E 187 134 -53 1.396
SiCl4 Silane, tetrachloro- 4 T2 221 180 -41 1.224
SiCl4 Silane, tetrachloro- 1 A1 424 350 -74 1.210
PCl5 Phosphorus pentachloride 5 E' 592 455 -137 1.301
PCl5 Phosphorus pentachloride 6 E' 273 196 -77 1.393
PCl5 Phosphorus pentachloride 8 E" 261 191 -70 1.363
PCl5 Phosphorus pentachloride 2 A1' 370 249 -121 1.489
PCl5 Phosphorus pentachloride 4 A2" 299 224 -75 1.335
PCl5 Phosphorus pentachloride 1 A1' 395 300 -95 1.316
PCl5 Phosphorus pentachloride 7 E' 100 59 -41 1.695
O3 Ozone 2 A1 705 555 -150 1.271
OClO Chlorine dioxide 2 A1 448 306 -142 1.465
OClO Chlorine dioxide 3 B2 1110 742 -368 1.495
OClO Chlorine dioxide 1 A1 946 678 -268 1.395
NO2 Nitrogen dioxide 3 B2 1618 1314 -304 1.232
N2O4 Dinitrogen tetroxide 9 B2u 265 204 -61 1.297
N2O3 Dinitrogen trioxide 9 A" 63 157 94 0.400
SCl2 Sulfur dichloride 2 A1 208 142 -66 1.462
SCl2 Sulfur dichloride 3 B2 535 420 -115 1.274
SCl2 Sulfur dichloride 1 A1 525 427 -98 1.230
NaK Sodium Potassium 1 Σ 124 100 -25 1.248
Li2O dilithium oxide 3 Πu 112 71 -40 1.565
C3 carbon trimer 3 Πu 63 150 87 0.423
MgOH magnesium hydroxide 3 Π 188 296 108 0.635
PO2 Phosphorus dioxide 3 B2 1328 983 -344 1.350
P4 Phosphorus tetramer 3 T2 467 381 -86 1.225
NCl nitrogen monochloride 1 Σ 828 685 -143 1.209
PS phosphorus sulfide 1 Σ 739 595 -144 1.243
S3 Sulfur trimer 1 A1 581 454 -127 1.278
S3 Sulfur trimer 2 A1 281 196 -85 1.436
S3 Sulfur trimer 3 B2 680 496 -184 1.371
Si2 Silicon diatomic 1 Σg 511 407 -104 1.256
ClNO2 Nitryl chloride 6 B2 408 336 -72 1.215
H2S2 HSSH 3 A 515 419 -96 1.228
SiH3Cl chlorosilane 3 A1 551 456 -95 1.207
F3PO Phosphoryl fluoride 6 E 336 264 -72 1.274
F3PO Phosphoryl fluoride 3 A1 472 388 -84 1.218
F3PO Phosphoryl fluoride 5 E 482 363 -119 1.326
ND3 Ammonia-d3 2 A1 748 521 -227 1.436
SiCl2 Dichlorosilylene 2 A1 201 150 -51 1.337
SiCl2 Dichlorosilylene 3 B2 509 424 -85 1.201
SiCl2 Dichlorosilylene 1 A1 522 427 -94 1.221
DO Hydroxyl-d 1 Σ 2720 2297 -423 1.184
NH2- amino anion 1 A1 3122 2583 -539 1.209
NH2- amino anion 3 B2 3190 2624 -566 1.216
NH Imidogen 1 Σ 3283 2799 -484 1.173
SiH- silicon monohydride anion 1 Σ 2175 1804 -371 1.206
N2F2 Dinitrogen difluoride, (E)- 1 Ag 1523 1251 -272 1.217
CaF Calcuium monofluoride 1 Σ 581 392 -189 1.483
SiCl Clorosilylidyne 1 Σ 536 433 -103 1.238
H3O+ hydronium 2 A1 954 485 -469 1.966
DF Hydrofluoric acid-d 1 Σ 2998 2563 -436 1.170
SCl sulfur monochloride 1 Σ 575 453 -122 1.269
FO2 Dioxygen monofluoride 1 A' 1487 1094 -393 1.359
PCl phosphorus chloride 1 Σ 577 425 -152 1.358
ClOO chloroperoxy radical 2 A' 414 333 -80 1.241
ClOO chloroperoxy radical 3 A' 201 119 -82 1.689
BCl boron monochloride 1 Σ 840 657 -184 1.280
SSO Disulfur monoxide 1 A' 1166 953 -214 1.224
SSO Disulfur monoxide 3 A' 380 273 -107 1.392
SSO Disulfur monoxide 2 A' 679 473 -206 1.435
S2 Sulfur diatomic 1 Σg 726 553 -173 1.312
GeH2 germylene 2 A1 916 1800 884 0.509
GeH2 germylene 1 A1 1856 892 -964 2.082
ClS2 Sulfur chloride 1 A' 662 487 -175 1.360
ClS2 Sulfur chloride 3 A' 196 153 -43 1.279
ClS2 Sulfur chloride 2 A' 450 363 -87 1.241
ZnCH3 Zinc monomethyl 6 E 315 632 317 0.498