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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 mPW1PW91/6-31G
Calculated values were scaled by 0.9466.

Species Name mode Symmetry Experiment Theory difference ratio
CH3CONH2 Acetamide 20 A 259 408 149 0.635
CH3COOH Acetic acid 11 A' 657 547 -110 1.200
CH3COOH Acetic acid 18 A" 93 77 -16 1.207
CH3OH Methyl alcohol 12 A" 200 328 128 0.610
CH3COCH3 Acetone 12 A2 77 40 -37 1.916
CH3SOCH3 Dimethyl sulfoxide 12 A' 308 231 -77 1.334
CH3SOCH3 Dimethyl sulfoxide 23 A" 333 218 -115 1.527
CH3SOCH3 Dimethyl sulfoxide 9 A' 1006 769 -237 1.309
CH3SOCH3 Dimethyl sulfoxide 11 A' 382 282 -100 1.353
C2H6O2S Dimethyl sulfone 13 A2 326 199 -127 1.642
C2H6O2S Dimethyl sulfone 20 B1 262 162 -100 1.621
C2H6O2S Dimethyl sulfone 19 B1 396 263 -133 1.506
C2H6O2S Dimethyl sulfone 27 B2 465 300 -165 1.549
C2H6O2S Dimethyl sulfone 7 A1 703 565 -138 1.245
C2H6O2S Dimethyl sulfone 9 A1 294 211 -83 1.393
C2H6O2S Dimethyl sulfone 17 B1 1269 1038 -231 1.222
C2H6O2S Dimethyl sulfone 6 A1 1013 786 -227 1.288
C2H6O2S Dimethyl sulfone 8 A1 496 336 -160 1.474
CH3NH2 methyl amine 14 A" 1195 936 -259 1.277
CH3NH2 methyl amine 9 A' 780 532 -248 1.467
CH3CH2NH2 Ethylamine 13 A' 773 567 -206 1.364
CHONH2 formamide 12 A" 289 526 237 0.549
CH3CHClCH3 Propane, 2-chloro- 27 A" 276 224 -52 1.231
CH3COCl Acetyl Chloride 15 A" 166 129 -37 1.285
N(CH3)3 Trimethylamine 7 A1 367 293 -74 1.251
CBr2F2 Methane, dibromodifluoro- 3 A1 140 303 163 0.462
CH3COOCH3 methyl acetate 26 A" 136 91 -45 1.502
CH3COOCH3 methyl acetate 27 A" 110 50 -60 2.185
C3H6O 2-Propen-1-ol 22 A 377 310 -67 1.217
C3H6O 2-Propen-1-ol 24 A 188 101 -87 1.859
C3H6O 2-Propen-1-ol 21 A 554 435 -119 1.274
CH3OCHO methyl formate 18 A" 130 83 -47 1.558
C4H8O Furan, tetrahydro- 17 A 286 238 -48 1.202
C4H8O Furan, tetrahydro- 33 B 137 62 -75 2.227
CH2C(CH3)CH3 1-Propene, 2-methyl- 15 A2 193 158 -35 1.220
C4H9N Pyrrolidine 19 A' 299 247 -52 1.209
C4H9N Pyrrolidine 36 A" 65 38 -27 1.693
CO2 Carbon dioxide 3 Πu 667 547 -120 1.219
C4H8 cyclobutane 6 A1 199 160 -39 1.245
N2H4 Hydrazine 12 B 966 505 -461 1.914
N2H4 Hydrazine 6 A 780 647 -133 1.205
C4H6O2 2,3-Butanedione 21 Bg 240 90 -150 2.657
C5H12 Propane, 2,2-dimethyl- 12 T1 203 297 94 0.684
C3H6O Oxetane 23 B2 1228 956 -272 1.285
C3O2 Carbon suboxide 7 Πu 61 136 75 0.449
HCNO fulminic acid 5 Π 224 377 153 0.594
C5H8 1,4-Pentadiene 31 B 721 595 -126 1.211
C5H8 1,4-Pentadiene 33 B 331 94 -237 3.508
C5H8 1,4-Pentadiene 17 A 102 83 -19 1.235
C5H8 1,4-Pentadiene 16 A 137 288 151 0.476
C6H10 1,5-Hexadiene 29 Bg 264 172 -92 1.536
C6H10 1,5-Hexadiene 14 Ag 351 256 -95 1.370
COBr2 Carbonic dibromide 6 B2 512 325 -187 1.573
COBr2 Carbonic dibromide 4 B1 757 489 -268 1.547
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 177 -50 1.279
CH3ONO Methyl nitrite 15 A" 186 145 -41 1.283
C2F2 difluoroacetylene 4 Πg 270 198 -72 1.362
C4H6O Cyclobutanone 12 A2 1163 940 -223 1.237
C4H6O Cyclobutanone 13 A2 909 648 -261 1.403
GeO2 Germanium dioxide 3 Πu 196 130 -65 1.501
LiOH lithium hydroxide 3 Π 257 414 157 0.620
SiF2 Silicon difluoride 2 A1 345 275 -70 1.252
SiF2 Silicon difluoride 2 A1 278 217 -61 1.282
CCl2 dichloromethylene 3 B2 758 605 -153 1.253
C5H10S 2H-Thiopyran, tetrahydro- 23 A' 194 155 -39 1.253
CH3OCH2CN Methoxyacetonitrile 15 A' 243 166 -77 1.464
CH3OCH2CN Methoxyacetonitrile 24 A" 113 80 -33 1.413
C5H8 1,3-Pentadiene, (E)- 32 A" 129 196 67 0.659
C5H8 1,3-Pentadiene, (E)- 31 A" 361 248 -113 1.458
SF6 Sulfur Hexafluoride 6 T2u 347 212 -135 1.640
SF6 Sulfur Hexafluoride 1 A1g 774 594 -180 1.303
SF6 Sulfur Hexafluoride 4 T1u 616 383 -232 1.606
SF6 Sulfur Hexafluoride 5 T2g 525 321 -204 1.638
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 98 -260 3.650
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 870 -266 1.306
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 144 -120 1.831
SO2F2 Sulfuryl fluoride 1 A1 1269 892 -377 1.422
SO2F2 Sulfuryl fluoride 3 A1 544 343 -201 1.587
SO2F2 Sulfuryl fluoride 6 B1 885 705 -180 1.256
SO2F2 Sulfuryl fluoride 9 B2 553 334 -219 1.656
SO2F2 Sulfuryl fluoride 4 A1 385 223 -162 1.726
SO2F2 Sulfuryl fluoride 2 A1 848 653 -195 1.299
SO2F2 Sulfuryl fluoride 5 A2 388 223 -165 1.742
SO2F2 Sulfuryl fluoride 7 B1 539 315 -224 1.710
SO2F2 Sulfuryl fluoride 8 B2 1502 1010 -492 1.487
CCl carbon monochloride 1 Σ 877 700 -177 1.252
SiH2Cl2 dichlorosilane 4 A1 188 153 -35 1.232
C4H6 Methylenecyclopropane 17 B1 360 295 -65 1.219
SeO2 Selenium dioxide 2 A1 373 309 -64 1.207
SO2 Sulfur dioxide 3 B2 1362 986 -376 1.381
SO2 Sulfur dioxide 1 A1 1151 884 -267 1.302
SO2 Sulfur dioxide 2 A1 518 378 -140 1.370
SeS- selenium monosulfide anion 1 Σ 469 385 -84 1.217
SeS Selenium monosulfide 1 Σ 556 463 -93 1.200
AlCl3 Aluminum trichloride 4 E' 150 124 -26 1.211
ClFO3 Perchloryl fluoride 3 A1 549 286 -263 1.920
ClFO3 Perchloryl fluoride 5 E 589 301 -288 1.958
ClFO3 Perchloryl fluoride 6 E 405 195 -210 2.074
ClFO3 Perchloryl fluoride 1 A1 1061 662 -399 1.602
ClFO3 Perchloryl fluoride 4 E 1315 765 -550 1.718
ClFO3 Perchloryl fluoride 2 A1 715 524 -191 1.365
SiO2 silicon dioxide 3 Πu 273 178 -95 1.535
HF Hydrogen fluoride 1 Σ 4138 3620 -519 1.143
NH3 Ammonia 2 A1 950 384 -566 2.473
H2SO4 Sulfuric acid 7 A 379 216 -162 1.750
H2SO4 Sulfuric acid 11 B 1157 939 -218 1.232
H2SO4 Sulfuric acid 13 B 558 331 -227 1.686
H2SO4 Sulfuric acid 3 A 1136 848 -288 1.340
H2SO4 Sulfuric acid 5 A 548 350 -198 1.567
H2SO4 Sulfuric acid 12 B 882 677 -205 1.303
H2SO4 Sulfuric acid 4 A 831 614 -217 1.354
H2SO4 Sulfuric acid 15 B 288 181 -107 1.592
H2SO4 Sulfuric acid 14 B 506 312 -194 1.622
H2SO4 Sulfuric acid 6 A 422 278 -144 1.519
H2SO4 Sulfuric acid 8 A 224 144 -80 1.553
H2SO4 Sulfuric acid 10 B 1452 1152 -301 1.261
SOCl2 thionyl chloride 2 A' 492 374 -118 1.314
SOCl2 thionyl chloride 4 A' 194 124 -70 1.566
SOCl2 thionyl chloride 3 A' 344 246 -98 1.397
SOCl2 thionyl chloride 5 A" 455 363 -92 1.255
SOCl2 thionyl chloride 1 A' 1251 955 -296 1.310
SOCl2 thionyl chloride 6 A" 284 208 -76 1.364
PCl3 Phosphorus trichloride 1 A1 504 419 -85 1.202
PCl3 Phosphorus trichloride 2 A1 252 196 -56 1.283
PCl3 Phosphorus trichloride 4 E 198 142 -56 1.392
Cl2 Chlorine diatomic 1 Σg 560 461 -99 1.215
NF3 Nitrogen trifluoride 4 E 492 406 -86 1.212
SiF4 Silicon tetrafluoride 1 A1 800 664 -136 1.204
SiF4 Silicon tetrafluoride 4 T2 389 310 -79 1.256
SiF4 Silicon tetrafluoride 2 E 268 203 -65 1.320
AsF5 Arsenic pentafluoride 6 E' 372 307 -65 1.211
AsF5 Arsenic pentafluoride 8 E" 386 320 -66 1.208
HSO3F Fluorosulfonic acid 6 A 823 631 -192 1.304
HSO3F Fluorosulfonic acid 8 A 551 326 -225 1.692
HSO3F Fluorosulfonic acid 2 A 1486 1127 -359 1.318
HSO3F Fluorosulfonic acid 4 A 1150 869 -281 1.324
HSO3F Fluorosulfonic acid 3 A 1243 970 -273 1.281
HSO3F Fluorosulfonic acid 5 A 896 689 -207 1.300
HSO3F Fluorosulfonic acid 10 A 409 264 -145 1.550
HSO3F Fluorosulfonic acid 9 A 518 323 -195 1.603
HSO3F Fluorosulfonic acid 11 A 390 223 -167 1.748
HSO3F Fluorosulfonic acid 7 A 562 345 -217 1.628
HSO3F Fluorosulfonic acid 12 A 266 151 -115 1.760
BrF5 bromine pentafluoride 6 B2 281 181 -100 1.557
BrF5 bromine pentafluoride 2 A1 587 479 -108 1.226
BrF5 bromine pentafluoride 1 A1 683 555 -128 1.230
BrF5 bromine pentafluoride 4 B1 312 226 -86 1.383
BrF5 bromine pentafluoride 8 E 415 310 -105 1.338
BrF5 bromine pentafluoride 3 A1 369 280 -89 1.319
BrF5 bromine pentafluoride 9 E 237 162 -75 1.461
ClF3 Chlorine trifluoride 4 B1 328 231 -97 1.423
ClF3 Chlorine trifluoride 6 B2 442 298 -144 1.485
ClF3 Chlorine trifluoride 3 A1 328 216 -112 1.519
ZnCN Zinc monocyanide 3 Π 212 149 -63 1.421
N2O Nitrous oxide 3 Π 589 443 -146 1.329
S2Cl2 Disulfur dichloride 4 A 95 75 -20 1.270
S2Cl2 Disulfur dichloride 2 A 466 388 -78 1.200
S2Cl2 Disulfur dichloride 6 B 244 182 -62 1.340
S2Cl2 Disulfur dichloride 3 A 202 155 -47 1.302
S2Cl2 Disulfur dichloride 1 A 546 432 -114 1.264
SiHCl3 Trichlorosilane 3 A1 254 205 -49 1.242
SiHCl3 Trichlorosilane 2 A1 499 413 -86 1.208
SiHCl3 Trichlorosilane 6 E 176 142 -34 1.243
SiCl4 Silane, tetrachloro- 4 T2 221 179 -42 1.235
SiCl4 Silane, tetrachloro- 1 A1 424 346 -78 1.226
SiCl4 Silane, tetrachloro- 2 E 150 117 -33 1.278
PCl5 Phosphorus pentachloride 5 E' 592 460 -132 1.287
PCl5 Phosphorus pentachloride 6 E' 273 200 -73 1.364
PCl5 Phosphorus pentachloride 8 E" 261 195 -66 1.340
PCl5 Phosphorus pentachloride 2 A1' 370 238 -132 1.553
PCl5 Phosphorus pentachloride 4 A2" 299 229 -70 1.305
PCl5 Phosphorus pentachloride 1 A1' 395 305 -90 1.294
PCl5 Phosphorus pentachloride 3 A2" 465 380 -85 1.225
PCl5 Phosphorus pentachloride 7 E' 100 64 -36 1.562
OClO Chlorine dioxide 2 A1 448 287 -161 1.562
OClO Chlorine dioxide 3 B2 1110 724 -386 1.532
OClO Chlorine dioxide 1 A1 946 684 -261 1.382
GeCl2 Germanium dichloride 2 A1 160 133 -27 1.202
N2O3 Dinitrogen trioxide 9 A" 63 140 77 0.451
SCl2 Sulfur dichloride 2 A1 208 154 -54 1.354
SCl2 Sulfur dichloride 3 B2 535 426 -109 1.255
SCl2 Sulfur dichloride 1 A1 525 432 -93 1.216
NS Mononitrogen monosulfide 1 Σ 1219 1007 -212 1.210
MgOH magnesium hydroxide 3 Π 188 346 158 0.543
PO2 Phosphorus dioxide 2 A1 397 315 -82 1.260
PO2 Phosphorus dioxide 3 B2 1328 848 -479 1.565
PO2 Phosphorus dioxide 1 A1 1076 837 -239 1.285
CaOH Calcium monohydroxide 2 Σ 353 573 220 0.616
CaOH Calcium monohydroxide 3 Π 609 455 -154 1.338
P4 Phosphorus tetramer 2 E 361 300 -61 1.202
P4 Phosphorus tetramer 3 T2 467 387 -80 1.208
S3- Sulfur trimer anion 3 B2 594 465 -129 1.277
S3 Sulfur trimer 1 A1 581 480 -101 1.209
S3 Sulfur trimer 2 A1 281 204 -77 1.378
S3 Sulfur trimer 3 B2 680 536 -144 1.270
H2S2 HSSH 3 A 515 428 -87 1.203
H2S2 HSSH 4 A 417 339 -78 1.231
SiH3Cl chlorosilane 3 A1 551 457 -94 1.205
F3PO Phosphoryl fluoride 6 E 336 226 -110 1.484
F3PO Phosphoryl fluoride 1 A1 1417 1109 -308 1.278
F3PO Phosphoryl fluoride 3 A1 472 345 -127 1.370
F3PO Phosphoryl fluoride 5 E 482 327 -155 1.476
F3PO Phosphoryl fluoride 2 A1 873 688 -185 1.268
AlFCl2 Aluminum dichloride fluoride 2 A1 450 370 -80 1.217
ND3 Ammonia-d3 2 A1 748 294 -454 2.542
SiCl2 Dichlorosilylene 2 A1 201 153 -48 1.311
SiCl2 Dichlorosilylene 1 A1 522 432 -90 1.208
AlCl Aluminum monochloride 1 Σ 482 393 -88 1.225
SiH- silicon monohydride anion 1 Σ 2175 1619 -556 1.343
SO Sulfur monoxide 1 Σ 1151 946 -205 1.216
SO+ sulfur monoxide cation 1 Σ 1360 1077 -283 1.263
SiCl Clorosilylidyne 1 Σ 536 434 -102 1.235
H3O+ hydronium 2 A1 954 610 -345 1.566
ZnH2 Zinc hydride 3 Πu 633 486 -146 1.300
PO+ phosphorus monoxide cation 1 Σ 1405 1165 -240 1.206
ClONO2 Chlorine nitrate 7 A' 273 213 -61 1.286
SCl sulfur monochloride 1 Σ 575 463 -111 1.240
FO2 Dioxygen monofluoride 3 A' 376 189 -187 1.986
FO2 Dioxygen monofluoride 2 A' 579 308 -272 1.883
CaCl calcium monochloride 1 Σ 368 292 -76 1.260
BrO Bromine monoxide 1 Σ 726 604 -122 1.202
PF+ phosphorus monofluoride cation 1 Σ 1053 850 -203 1.239
ClOO chloroperoxy radical 2 A' 414 219 -195 1.891
ClOO chloroperoxy radical 3 A' 201 102 -99 1.966
SiCl3 trichlorosilyl radical 1 A1 470 381 -89 1.233
SSO Disulfur monoxide 1 A' 1166 893 -273 1.306
SSO Disulfur monoxide 3 A' 380 282 -98 1.345
SSO Disulfur monoxide 2 A' 679 530 -149 1.281
OBrO OBrO 2 A1 312 247 -66 1.266
OBrO OBrO 3 B2 849 642 -206 1.322
OBrO OBrO 1 A1 799 636 -164 1.257
GeH2 germylene 2 A1 916 1787 871 0.513
GeH2 germylene 1 A1 1856 910 -946 2.040
Mg2 Magnesium diatomic 1 Σg 51 75 24 0.682
ZnCH3 Zinc monomethyl 6 E 315 622 307 0.507
C2F6 hexafluoroethane 4 A1u 68 54 -14 1.262
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 524 -108 1.207
C4H8O2 1,4-Dioxane 19 Au 288 228 -60 1.263
C2H3NO3 Oxamic acid 16 A" 984 784 -200 1.255
CH3SSCH3 Disulfide, dimethyl 11 A 240 194 -46 1.239
CaO Calcium monoxide 1 Σ 732 533 -199 1.372
PF5 Phosphorus pentafluoride 1 A1' 816 647 -169 1.261
PF5 Phosphorus pentafluoride 7 E' 174 139 -35 1.252
SF4 Sulfur tetrafluoride 1 A1 892 714 -177 1.248
SO2Cl2 Sulfuryl chloride 1 A1 1205 839 -366 1.436
SO2Cl2 Sulfuryl chloride 3 A1 408 262 -146 1.556
SO2Cl2 Sulfuryl chloride 6 B1 586 409 -177 1.434
SO2Cl2 Sulfuryl chloride 9 B2 362 223 -139 1.625
Cl3PO Phosphoryl chloride 2 A1 481 368 -113 1.308
C3 carbon trimer 3 Πu 63 199 135 0.319
ClS2 Sulfur chloride 1 A' 662 520 -142 1.272
C2H4O3 trioxolane124 21 B 193 151 -42 1.276
C2H3NO3 Oxamic acid 21 A" 162 80 -82 2.029
CH3SSCH3 Disulfide, dimethyl 23 B 274 217 -57 1.260
C3H7N Cyclopropylamine 14 A' 762 530 -232 1.439
OH- hydroxide anion 1 Σ 3738 3105 -634 1.204
NF2 Difluoroamino radical 2 A1 573 475 -98 1.207
SO3 Sulfur trioxide 1 A1' 1065 757 -308 1.407
SF4 Sulfur tetrafluoride 3 A1 532 374 -158 1.423
SF4 Sulfur tetrafluoride 9 B2 475 376 -99 1.263
N2O4 Dinitrogen tetroxide 9 B2u 265 216 -49 1.230
PCl phosphorus chloride 1 Σ 577 443 -134 1.303
S2 Sulfur diatomic 1 Σg 726 594 -131 1.221
HNCO Isocyanic acid 5 A' 577 471 -107 1.227
CHOCH(CH3)CH3 Propanal, 2-methyl- 33 A" 75 54 -21 1.393
C5H8 Cyclopentene 18 A' 254 120 -134 2.114
C2H3NO3 Oxamic acid 3 A' 2600 3448 848 0.754
C2H3NO3 Oxamic acid 15 A' 328 261 -67 1.258
C2H3NO3 Oxamic acid 17 A" 815 671 -144 1.214
CH3SSCH3 Disulfide, dimethyl 10 A 509 422 -87 1.206
C3H7N Cyclopropylamine 12 A' 989 809 -180 1.222
SO3 Sulfur trioxide 2 A2" 498 281 -217 1.775
SO3 Sulfur trioxide 3 E' 1391 968 -423 1.437
SO3 Sulfur trioxide 4 E' 530 337 -193 1.575
C2Cl2+ dichloroacetylene cation 5 Πu 233 165 -68 1.410
BF3+ boron trifluoride cation 4 E' 411 -372 -783 -1.104
PF5 Phosphorus pentafluoride 4 A2" 575 414 -161 1.387
PF5 Phosphorus pentafluoride 8 E" 520 356 -164 1.461
HN3 hydrogen azide 6 A" 607 506 -101 1.200
PF3 Phosphorus trifluoride 2 A1 487 351 -136 1.386
PF3 Phosphorus trifluoride 4 E 344 247 -97 1.391
SF4 Sulfur tetrafluoride 7 B1 353 277 -76 1.274
SO2Cl2 Sulfuryl chloride 2 A1 577 398 -179 1.448
SO2Cl2 Sulfuryl chloride 4 A1 218 126 -92 1.726
SO2Cl2 Sulfuryl chloride 5 A2 282 169 -113 1.669
SO2Cl2 Sulfuryl chloride 7 B1 388 239 -149 1.625
SO2Cl2 Sulfuryl chloride 8 B2 1434 982 -452 1.460
Cl3PO Phosphoryl chloride 1 A1 1322 1016 -306 1.301
Cl3PO Phosphoryl chloride 5 E 333 241 -92 1.382
Cl3PO Phosphoryl chloride 6 E 187 135 -52 1.382
NCl nitrogen monochloride 1 Σ 828 678 -150 1.221
AlO Aluminum monoxide 1 Σ 979 812 -167 1.206
ClS2 Sulfur chloride 2 A' 450 359 -91 1.252
C3H4O2 β–Propiolactone 21 A" 113 175 62 0.646
HNCO Isocyanic acid 6 A" 656 541 -115 1.213
C5H12 Pentane 23 A2 131 105 -26 1.242
CH3SSCH3 Disulfide, dimethyl 13 A 117 78 -39 1.505
CH2OH Hydroxymethyl radical 9 A 234 366 132 0.639
BF3+ boron trifluoride cation 3 E' 1662 663 -998 2.505
PF5 Phosphorus pentafluoride 6 E' 533 383 -150 1.391
SF4 Sulfur tetrafluoride 4 A1 228 91 -137 2.509
Cl3PO Phosphoryl chloride 3 A1 266 196 -70 1.358
Cl3PO Phosphoryl chloride 4 E 590 458 -132 1.288
HPO HPO 2 A' 1188 972 -216 1.222
PO Phosphorus monoxide 1 Σ 1233 1024 -209 1.204
BCl boron monochloride 1 Σ 840 680 -160 1.236
HNCO Isocyanic acid 4 A' 777 542 -235 1.434
CH3SCH3 Dimethyl sulfide 7 A1 282 234 -48 1.203