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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 B3PW91/3-21G
Calculated values were scaled by 0.9612.

Species Name mode Symmetry Experiment Theory difference ratio
NH2CONH2 Urea 9 A2 233 131 -102 1.781
NH2CONH2 Urea 16 B2 1393 3571 2178 0.390
NH2CONH2 Urea 17 B2 1004 3441 2437 0.292
NH2CONH2 Urea 18 B2 543 970 427 0.560
CH3CONH2 Acetamide 20 A 259 400 141 0.647
CH3COOH Acetic acid 11 A' 657 545 -112 1.206
CH3OH Methyl alcohol 12 A" 200 370 170 0.540
CH3COCH3 Acetone 12 A2 77 61 -16 1.258
C2H6O2S Dimethyl sulfone 13 A2 326 193 -133 1.687
C2H6O2S Dimethyl sulfone 20 B1 262 164 -98 1.598
C2H6O2S Dimethyl sulfone 19 B1 396 270 -126 1.468
C2H6O2S Dimethyl sulfone 27 B2 465 307 -158 1.513
C2H6O2S Dimethyl sulfone 7 A1 703 549 -154 1.281
C2H6O2S Dimethyl sulfone 9 A1 294 232 -62 1.270
C2H6O2S Dimethyl sulfone 26 B2 771 614 -157 1.256
C2H6O2S Dimethyl sulfone 8 A1 496 386 -110 1.284
CH3NH2 methyl amine 14 A" 1195 954 -241 1.252
CHONH2 formamide 12 A" 289 497 208 0.581
CH3COCl Acetyl Chloride 9 A' 445 371 -74 1.200
CCl2O Phosgene 5 B2 849 682 -167 1.245
CCl2O Phosgene 2 A1 567 466 -101 1.218
CBr2F2 Methane, dibromodifluoro- 3 A1 140 298 158 0.470
CFCl3 Trichloromonofluoromethane 2 A1 535 443 -92 1.208
CF2Cl2 difluorodichloromethane 3 A1 458 378 -80 1.212
CF2Cl2 difluorodichloromethane 6 B1 902 748 -154 1.206
CF2Cl2 difluorodichloromethane 9 B2 446 364 -82 1.225
CF2Cl2 difluorodichloromethane 7 B1 437 364 -73 1.201
CH3COOCH3 methyl acetate 26 A" 136 73 -63 1.865
CH3COOCH3 methyl acetate 27 A" 110 62 -48 1.785
C3H6O 2-Propen-1-ol 22 A 377 299 -78 1.262
C3H6O 2-Propen-1-ol 24 A 188 100 -88 1.880
C3H6O 2-Propen-1-ol 21 A 554 444 -110 1.248
CH3OCHO methyl formate 18 A" 130 73 -57 1.774
C4H8O Furan, tetrahydro- 33 B 137 54 -83 2.524
C4H9N Pyrrolidine 36 A" 65 29 -36 2.237
N2H4 Hydrazine 12 B 966 801 -165 1.206
N2H4 Hydrazine 6 A 780 602 -178 1.296
C4H6O2 2,3-Butanedione 21 Bg 240 59 -181 4.057
C4H6O2 2,3-Butanedione 16 Au 48 35 -13 1.389
C2N2 Cyanogen 4 Πg 503 761 258 0.661
C5H12 Propane, 2,2-dimethyl- 12 T1 203 320 117 0.634
C3H6O Oxetane 23 B2 1228 951 -277 1.291
C3H6O Oxetane 7 A1 1018 840 -178 1.211
C3O2 Carbon suboxide 7 Πu 61 147 86 0.416
HCNO fulminic acid 5 Π 224 530 306 0.423
Zn(CH3)2 dimethyl zinc 11 E' 134 -104 -238 -1.283
C5H8 1,4-Pentadiene 31 B 721 595 -126 1.212
C5H8 1,4-Pentadiene 33 B 331 92 -239 3.590
C5H8 1,4-Pentadiene 17 A 102 79 -23 1.286
C5H8 1,4-Pentadiene 16 A 137 300 163 0.456
C6H10 1,5-Hexadiene 29 Bg 264 176 -88 1.500
C6H10 1,5-Hexadiene 14 Ag 351 264 -87 1.331
CH2FCl fluorochloromethane 6 A' 385 315 -70 1.222
CH2FCl fluorochloromethane 5 A' 760 616 -144 1.234
COBr2 Carbonic dibromide 6 B2 512 325 -187 1.573
COBr2 Carbonic dibromide 4 B1 757 503 -254 1.505
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 175 -52 1.296
CH3ONO Methyl nitrite 15 A" 186 136 -50 1.371
C4N2 2-Butynedinitrile 6 Πg 504 911 407 0.553
C4N2 2-Butynedinitrile 8 Πu 472 688 216 0.686
GeO2 Germanium dioxide 3 Πu 196 -71 -267 -2.751
LiOH lithium hydroxide 3 Π 257 400 143 0.642
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 219 75 0.659
C5H8 1,3-Pentadiene, (Z)- 32 A" 171 139 -32 1.230
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 344 -112 1.327
CCl2 dichloromethylene 2 A1 335 273 -63 1.230
CCl2 dichloromethylene 3 B2 758 578 -180 1.311
C5H8 1,3-Pentadiene, (E)- 32 A" 129 196 67 0.659
C5H8 1,3-Pentadiene, (E)- 31 A" 361 247 -114 1.463
C2H Ethynyl radical 3 Π 372 539 168 0.689
CH3 Methyl radical 2 A2" 606 473 -133 1.281
SF6 Sulfur Hexafluoride 6 T2u 347 230 -117 1.511
SF6 Sulfur Hexafluoride 1 A1g 774 642 -132 1.205
SF6 Sulfur Hexafluoride 4 T1u 616 426 -190 1.447
SF6 Sulfur Hexafluoride 5 T2g 525 357 -168 1.469
COHCl Formyl chloride 5 A' 457 374 -83 1.222
COHCl Formyl chloride 4 A' 739 613 -126 1.205
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 97 -261 3.683
C6H8 1,3,5-Hexatriene, (Z)- 36 B2 243 348 105 0.699
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 868 -268 1.309
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 144 -120 1.836
SO2F2 Sulfuryl fluoride 1 A1 1269 1018 -251 1.247
SO2F2 Sulfuryl fluoride 3 A1 544 391 -153 1.392
SO2F2 Sulfuryl fluoride 9 B2 553 381 -172 1.453
SO2F2 Sulfuryl fluoride 4 A1 385 256 -129 1.505
SO2F2 Sulfuryl fluoride 5 A2 388 265 -123 1.465
SO2F2 Sulfuryl fluoride 7 B1 539 356 -183 1.515
SO2F2 Sulfuryl fluoride 8 B2 1502 1175 -327 1.278
OH Hydroxyl radical 1 Σ 3738 3181 -557 1.175
OH+ hydoxyl cation 1 Σ 3113 2606 -508 1.195
CCl carbon monochloride 1 Σ 877 650 -227 1.349
CCl+ carbon monochloride cation 1 Σ 1175 913 -262 1.287
SiH2Cl2 dichlorosilane 3 A1 527 438 -89 1.204
SO2 Sulfur dioxide 3 B2 1362 1081 -281 1.260
SO2 Sulfur dioxide 1 A1 1151 933 -219 1.234
SO2 Sulfur dioxide 2 A1 518 415 -103 1.247
SeS- selenium monosulfide anion 1 Σ 469 385 -84 1.217
SeS Selenium monosulfide 1 Σ 556 447 -108 1.243
C2Cl2 dichloroacetylene 4 Πg 333 595 262 0.559
ClFO3 Perchloryl fluoride 3 A1 549 323 -226 1.699
ClFO3 Perchloryl fluoride 5 E 589 346 -243 1.701
ClFO3 Perchloryl fluoride 6 E 405 225 -180 1.798
ClFO3 Perchloryl fluoride 1 A1 1061 723 -338 1.467
ClFO3 Perchloryl fluoride 4 E 1315 875 -440 1.503
ClFO3 Perchloryl fluoride 2 A1 715 541 -174 1.323
SiO2 silicon dioxide 3 Πu 273 121 -151 2.246
HCl+ hydrogen chloride cation 1 Σ 2674 2261 -412 1.182
HF Hydrogen fluoride 1 Σ 4138 3551 -588 1.166
NH3 Ammonia 2 A1 950 691 -259 1.375
HNO3 Nitric acid 7 A' 579 480 -99 1.206
SOCl2 thionyl chloride 2 A' 492 372 -120 1.323
SOCl2 thionyl chloride 4 A' 194 111 -83 1.748
SOCl2 thionyl chloride 3 A' 344 239 -105 1.438
SOCl2 thionyl chloride 5 A" 455 365 -90 1.245
SOCl2 thionyl chloride 1 A' 1251 1038 -213 1.205
SOCl2 thionyl chloride 6 A" 284 204 -80 1.393
PCl3 Phosphorus trichloride 1 A1 504 412 -92 1.223
PCl3 Phosphorus trichloride 2 A1 252 184 -68 1.369
PCl3 Phosphorus trichloride 4 E 198 139 -59 1.429
Cl2 Chlorine diatomic 1 Σg 560 460 -100 1.218
NF3 Nitrogen trifluoride 2 A1 647 527 -120 1.229
NF3 Nitrogen trifluoride 4 E 492 388 -104 1.267
AlF3 Aluminum trifluoride 2 A2" 297 246 -51 1.205
HSO3F Fluorosulfonic acid 6 A 823 682 -141 1.208
HSO3F Fluorosulfonic acid 8 A 551 368 -183 1.498
HSO3F Fluorosulfonic acid 2 A 1486 1205 -281 1.233
HSO3F Fluorosulfonic acid 10 A 409 293 -116 1.396
HSO3F Fluorosulfonic acid 9 A 518 357 -161 1.450
HSO3F Fluorosulfonic acid 11 A 390 254 -136 1.536
HSO3F Fluorosulfonic acid 7 A 562 395 -167 1.424
HSO3F Fluorosulfonic acid 12 A 266 187 -79 1.421
KF Potassium Fluoride 1 Σ 428 339 -89 1.263
FNO Nitrosyl fluoride 1 A' 1844 1501 -343 1.228
FNO3 Fluorine nitrate 7 A' 303 249 -54 1.216
BrF5 bromine pentafluoride 6 B2 281 158 -123 1.782
BrF5 bromine pentafluoride 8 E 415 303 -112 1.368
BrF5 bromine pentafluoride 4 B1 312 238 -74 1.312
BrF5 bromine pentafluoride 3 A1 369 285 -84 1.295
BrF5 bromine pentafluoride 9 E 237 172 -65 1.379
ClF3 Chlorine trifluoride 4 B1 328 242 -86 1.354
ClF3 Chlorine trifluoride 1 A1 752 608 -144 1.237
ClF3 Chlorine trifluoride 6 B2 442 284 -158 1.554
ClF3 Chlorine trifluoride 3 A1 328 207 -121 1.585
S2Cl2 Disulfur dichloride 4 A 95 68 -27 1.388
S2Cl2 Disulfur dichloride 2 A 466 383 -83 1.217
S2Cl2 Disulfur dichloride 6 B 244 173 -71 1.414
S2Cl2 Disulfur dichloride 3 A 202 145 -57 1.388
S2Cl2 Disulfur dichloride 1 A 546 411 -135 1.329
SiHCl3 Trichlorosilane 3 A1 254 204 -50 1.248
SiHCl3 Trichlorosilane 2 A1 499 412 -87 1.212
NCl3 nitrogen trichloride 4 E 257 213 -44 1.204
SiCl4 Silane, tetrachloro- 4 T2 221 182 -39 1.215
SiCl4 Silane, tetrachloro- 1 A1 424 347 -77 1.221
PCl5 Phosphorus pentachloride 5 E' 592 449 -143 1.320
PCl5 Phosphorus pentachloride 6 E' 273 193 -80 1.417
PCl5 Phosphorus pentachloride 8 E" 261 187 -74 1.396
PCl5 Phosphorus pentachloride 2 A1' 370 244 -126 1.515
PCl5 Phosphorus pentachloride 4 A2" 299 217 -82 1.375
PCl5 Phosphorus pentachloride 1 A1' 395 294 -101 1.343
PCl5 Phosphorus pentachloride 7 E' 100 57 -43 1.768
O3 Ozone 2 A1 705 558 -147 1.262
HBr+ hydrogen bromide cation 1 Σ 2442 2015 -426 1.211
OClO Chlorine dioxide 2 A1 448 308 -140 1.453
OClO Chlorine dioxide 3 B2 1110 733 -377 1.515
OClO Chlorine dioxide 1 A1 946 680 -266 1.391
GeCl2 Germanium dichloride 2 A1 160 128 -32 1.253
NO2 Nitrogen dioxide 3 B2 1618 1314 -304 1.231
N2O3 Dinitrogen trioxide 9 A" 63 151 88 0.417
SCl2 Sulfur dichloride 2 A1 208 143 -65 1.450
SCl2 Sulfur dichloride 3 B2 535 419 -116 1.278
SCl2 Sulfur dichloride 1 A1 525 425 -100 1.235
Li2O dilithium oxide 3 Πu 112 67 -44 1.655
PO2 Phosphorus dioxide 3 B2 1328 969 -359 1.371
CaOH Calcium monohydroxide 2 Σ 353 577 224 0.612
CaOH Calcium monohydroxide 3 Π 609 385 -224 1.583
C4 Carbon tetramer 5 Πu 160 133 -27 1.200
P4 Phosphorus tetramer 1 A1 601 499 -101 1.203
P4 Phosphorus tetramer 2 E 361 295 -66 1.223
P4 Phosphorus tetramer 3 T2 467 374 -93 1.248
Cu2 Copper dimer 1 Σg 265 219 -45 1.206
PS phosphorus sulfide 1 Σ 739 590 -149 1.253
PS+ phosphorus monosulfide cation 1 Σ 845 692 -152 1.220
S3- Sulfur trimer anion 3 B2 594 444 -150 1.339
S3 Sulfur trimer 1 A1 581 449 -132 1.294
S3 Sulfur trimer 2 A1 281 193 -88 1.456
S3 Sulfur trimer 3 B2 680 490 -190 1.387
H2S2 HSSH 3 A 515 418 -96 1.230
H2S2 HSSH 4 A 417 325 -93 1.285
SiH3Cl chlorosilane 3 A1 551 453 -98 1.217
F3PO Phosphoryl fluoride 6 E 336 266 -70 1.265
F3PO Phosphoryl fluoride 3 A1 472 389 -83 1.214
F3PO Phosphoryl fluoride 5 E 482 366 -116 1.318
ND3 Ammonia-d3 2 A1 748 528 -220 1.417
SiCl2 Dichlorosilylene 2 A1 201 151 -49 1.325
SiCl2 Dichlorosilylene 3 B2 509 424 -86 1.203
SiCl2 Dichlorosilylene 1 A1 522 425 -97 1.229
DO Hydroxyl-d 1 Σ 2720 2316 -405 1.175
NH2- amino anion 3 B2 3190 2617 -573 1.219
NH2- amino anion 1 A1 3122 2578 -544 1.211
NH Imidogen 1 Σ 3283 2835 -448 1.158
SiH- silicon monohydride anion 1 Σ 2175 1652 -523 1.316
N2F2 Dinitrogen difluoride, (E)- 1 Ag 1523 1242 -281 1.226
CaF Calcuium monofluoride 1 Σ 581 470 -112 1.238
SO+ sulfur monoxide cation 1 Σ 1360 1133 -227 1.200
SiCl Clorosilylidyne 1 Σ 536 429 -107 1.249
H3O+ hydronium 2 A1 954 481 -474 1.986
DF Hydrofluoric acid-d 1 Σ 2998 2574 -424 1.165
ClONO2 Chlorine nitrate 7 A' 273 216 -58 1.267
SCl sulfur monochloride 1 Σ 575 451 -124 1.274
FO2 Dioxygen monofluoride 1 A' 1487 1102 -385 1.350
CaCl calcium monochloride 1 Σ 368 295 -73 1.248
ClOO chloroperoxy radical 3 A' 201 116 -85 1.735
SiCl3 trichlorosilyl radical 3 E 582 483 -99 1.206
SiCl3 trichlorosilyl radical 1 A1 470 378 -92 1.243
SSO Disulfur monoxide 1 A' 1166 953 -213 1.224
SSO Disulfur monoxide 3 A' 380 273 -107 1.393
SSO Disulfur monoxide 2 A' 679 471 -208 1.441
GeH2 germylene 2 A1 916 1710 794 0.536
GeH2 germylene 1 A1 1856 868 -988 2.138
ZnCH3 Zinc monomethyl 6 E 315 637 322 0.495
CHF2Cl difluorochloromethane 4 A' 812 670 -142 1.212
CHF2Cl difluorochloromethane 9 A" 366 304 -62 1.202
CF3Cl Methane, chlorotrifluoro- 3 A1 476 380 -96 1.251
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 520 -112 1.214
C4H8O2 1,4-Dioxane 19 Au 288 221 -67 1.304
CH2N4 1H-Tetrazole 11 A' 925 764 -161 1.210
C3H8O2S (Methylsulphonyl)ethane 28 ?a 519 415 -104 1.250
C3H8O2S (Methylsulphonyl)ethane 30 ?a 384 300 -84 1.281
CH3SSCH3 Disulfide, dimethyl 11 A 240 188 -52 1.279
CaO Calcium monoxide 1 Σ 732 544 -188 1.347
CCl3 Trichloromethyl radical 3 E 898 746 -152 1.204
O2+ diatomic oxygen cation 1 Σg 1906 1425 -481 1.337
SO2Cl2 Sulfuryl chloride 1 A1 1205 927 -278 1.300
SO2Cl2 Sulfuryl chloride 3 A1 408 264 -144 1.546
SO2Cl2 Sulfuryl chloride 6 B1 586 403 -183 1.454
SO2Cl2 Sulfuryl chloride 9 B2 362 214 -148 1.693
Cl3PO Phosphoryl chloride 2 A1 481 352 -129 1.367
C3 carbon trimer 3 Πu 63 151 87 0.420
OH- hydroxide anion 1 Σ 3738 2662 -1077 1.404
NF2 Difluoroamino radical 2 A1 573 458 -115 1.251
SO3 Sulfur trioxide 1 A1' 1065 825 -240 1.291
C2Cl2+ dichloroacetylene cation 4 Πg 318 614 296 0.518
SF4 Sulfur tetrafluoride 3 A1 532 403 -129 1.322
N2O4 Dinitrogen tetroxide 9 B2u 265 188 -77 1.413
PCl phosphorus chloride 1 Σ 577 425 -152 1.358
S2 Sulfur diatomic 1 Σg 726 548 -177 1.323
HNCO Isocyanic acid 5 A' 577 446 -132 1.295
C2H2O2 Ethanedial 7 Au 127 195 68 0.650
C5H8 Cyclopentene 18 A' 254 125 -129 2.026
C2H4O3 trioxolane124 21 B 193 159 -34 1.212
COFCl Carbonic chloride fluoride 4 A' 501 417 -84 1.202
C2H3NO3 Oxamic acid 21 A" 162 114 -48 1.421
C3H8O2S (Methylsulphonyl)ethane 24 ?a 1060 876 -184 1.210
C3H8O2S (Methylsulphonyl)ethane 26 ?a 769 612 -157 1.257
C3H8O2S (Methylsulphonyl)ethane 33 ?a 257 200 -57 1.282
CH3SSCH3 Disulfide, dimethyl 12 A 134 111 -23 1.210
CH3SSCH3 Disulfide, dimethyl 23 B 274 216 -58 1.268
C3H7N Cyclopropylamine 14 A' 762 622 -140 1.225
SO3 Sulfur trioxide 2 A2" 498 306 -192 1.625
SO3 Sulfur trioxide 3 E' 1391 1091 -300 1.275
SO3 Sulfur trioxide 4 E' 530 391 -139 1.357
BF3+ boron trifluoride cation 4 E' 411 76 -335 5.416
PF5 Phosphorus pentafluoride 4 A2" 575 454 -121 1.266
PF5 Phosphorus pentafluoride 8 E" 520 391 -129 1.330
PF3 Phosphorus trifluoride 2 A1 487 395 -92 1.233
PF3 Phosphorus trifluoride 4 E 344 283 -61 1.216
SF4 Sulfur tetrafluoride 7 B1 353 278 -75 1.270
SO2Cl2 Sulfuryl chloride 2 A1 577 425 -152 1.358
SO2Cl2 Sulfuryl chloride 4 A1 218 116 -102 1.875
SO2Cl2 Sulfuryl chloride 5 A2 282 157 -125 1.797
SO2Cl2 Sulfuryl chloride 7 B1 388 234 -154 1.658
SO2Cl2 Sulfuryl chloride 8 B2 1434 1105 -329 1.298
Cl3PO Phosphoryl chloride 5 E 333 247 -86 1.346
Cl3PO Phosphoryl chloride 6 E 187 134 -53 1.395
NCl nitrogen monochloride 1 Σ 828 666 -162 1.243
ClNO2 Nitryl chloride 6 B2 408 339 -69 1.204
C2H3NO3 Oxamic acid 3 A' 2600 3387 787 0.768
C2H3NO3 Oxamic acid 15 A' 328 254 -74 1.293
C2H3NO3 Oxamic acid 17 A" 815 668 -147 1.221
C3H8O2S (Methylsulphonyl)ethane 27 ?a 674 535 -139 1.260
C3H8O2S (Methylsulphonyl)ethane 29 ?a 491 357 -134 1.374
CH3SSCH3 Disulfide, dimethyl 10 A 509 416 -93 1.224
C3H7N Cyclopropylamine 12 A' 989 790 -199 1.252
C3H4O2 β–Propiolactone 21 A" 113 162 49 0.699
C3H8O2S (Methylsulphonyl)ethane 32 ?a 324 227 -97 1.428
CH3SSCH3 Disulfide, dimethyl 13 A 117 72 -45 1.616
BF3+ boron trifluoride cation 3 E' 1662 927 -735 1.793
PF5 Phosphorus pentafluoride 6 E' 533 422 -111 1.263
SF4 Sulfur tetrafluoride 4 A1 228 124 -104 1.842
Cl3PO Phosphoryl chloride 3 A1 266 186 -80 1.430
Cl3PO Phosphoryl chloride 4 E 590 435 -155 1.355
SF2 sulfur difluoride 2 A1 355 281 -74 1.264
BCl boron monochloride 1 Σ 840 665 -175 1.264
HNCO Isocyanic acid 4 A' 777 576 -200 1.348
CH3SCH3 Dimethyl sulfide 7 A1 282 232 -50 1.217
CHF2Cl difluorochloromethane 6 A' 413 333 -80 1.239