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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 LSDA/6-31G
Calculated values were scaled by 0.9797.

Species Name mode Symmetry Experiment Theory difference ratio
C3H4O2 β–Propiolactone 21 A" 113 183 70 0.616
CH3CONH2 Acetamide 20 A 259 421 162 0.614
CH3COOH Acetic acid 18 A" 93 64 -29 1.450
CH3OH Methyl alcohol 12 A" 200 348 148 0.574
CH3SOCH3 Dimethyl sulfoxide 12 A' 308 235 -73 1.309
CH3SOCH3 Dimethyl sulfoxide 23 A" 333 221 -112 1.510
CH3SOCH3 Dimethyl sulfoxide 11 A' 382 293 -89 1.306
C2H6O2S Dimethyl sulfone 13 A2 326 192 -134 1.697
C2H6O2S Dimethyl sulfone 20 B1 262 163 -99 1.608
C2H6O2S Dimethyl sulfone 19 B1 396 265 -131 1.496
C2H6O2S Dimethyl sulfone 27 B2 465 304 -161 1.528
C2H6O2S Dimethyl sulfone 7 A1 703 572 -131 1.229
C2H6O2S Dimethyl sulfone 9 A1 294 210 -84 1.403
C2H6O2S Dimethyl sulfone 6 A1 1013 842 -171 1.203
C2H6O2S Dimethyl sulfone 8 A1 496 352 -144 1.407
CH3NH2 methyl amine 14 A" 1195 930 -265 1.285
CH3NH2 methyl amine 9 A' 780 433 -347 1.800
CH3CH2NH2 Ethylamine 13 A' 773 508 -265 1.522
CHONH2 formamide 12 A" 289 550 262 0.525
HNCO Isocyanic acid 5 A' 577 433 -144 1.333
HNCO Isocyanic acid 6 A" 656 540 -116 1.215
HNCO Isocyanic acid 4 A' 777 536 -240 1.448
CH3SCH3 Dimethyl sulfide 7 A1 282 233 -49 1.211
CH3COCl Acetyl Chloride 15 A" 166 129 -37 1.290
N(CH3)3 Trimethylamine 7 A1 367 297 -70 1.236
CBr2F2 Methane, dibromodifluoro- 3 A1 140 312 172 0.448
C2F6 hexafluoroethane 4 A1u 68 45 -23 1.499
CHOCH(CH3)CH3 Propanal, 2-methyl- 33 A" 75 53 -22 1.414
C3H6O 2-Propen-1-ol 22 A 377 305 -72 1.237
C3H6O 2-Propen-1-ol 24 A 188 109 -79 1.722
C3H6O 2-Propen-1-ol 21 A 554 443 -111 1.250
CH3OCHO methyl formate 18 A" 130 32 -98 4.062
C4H8O Furan, tetrahydro- 33 B 137 67 -70 2.054
C4H9N Pyrrolidine 36 A" 65 54 -11 1.207
CO2 Carbon dioxide 3 Πu 667 544 -123 1.226
C5H8 Cyclopentene 18 A' 254 148 -106 1.720
C4H4N2 Pyridazine 13 A2 421 345 -76 1.220
C4H4N2 Pyrazine 7 Au 350 283 -67 1.238
N2H4 Hydrazine 12 B 966 184 -782 5.261
N2H4 Hydrazine 7 A 377 184 -193 2.053
C4H6O2 2,3-Butanedione 13 Au 1111 923 -188 1.204
C4H6O2 2,3-Butanedione 21 Bg 240 45 -195 5.344
C4H6O2 2,3-Butanedione 16 Au 48 -31 -79 -1.532
C5H12 Propane, 2,2-dimethyl- 12 T1 203 319 116 0.637
C2H3NO3 Oxamic acid 16 A" 984 795 -189 1.237
C2H3NO3 Oxamic acid 15 A' 328 262 -66 1.250
C2H3NO3 Oxamic acid 21 A" 162 96 -66 1.691
C2H3NO3 Oxamic acid 3 A' 2600 3419 819 0.760
C3O2 Carbon suboxide 7 Πu 61 151 90 0.404
C5H8 1,4-Pentadiene 31 B 721 600 -121 1.201
C5H8 1,4-Pentadiene 33 B 331 99 -232 3.358
C5H8 1,4-Pentadiene 16 A 137 289 152 0.474
C6H10 1,5-Hexadiene 29 Bg 264 208 -56 1.271
C6H10 1,5-Hexadiene 14 Ag 351 275 -76 1.276
COBr2 Carbonic dibromide 6 B2 512 331 -181 1.545
COBr2 Carbonic dibromide 4 B1 757 503 -254 1.505
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 173 -54 1.313
CH3ONO Methyl nitrite 15 A" 186 87 -99 2.130
CH3SSCH3 Disulfide, dimethyl 11 A 240 192 -48 1.248
CH3SSCH3 Disulfide, dimethyl 13 A 117 76 -41 1.549
CH3SSCH3 Disulfide, dimethyl 23 B 274 226 -48 1.212
C3H6O2 1,3-Dioxolane 5 A 1480 2910 1430 0.509
C3H6O2 1,3-Dioxolane 4 A 1509 2918 1409 0.517
C3H6O2 1,3-Dioxolane 6 A 1361 2903 1542 0.469
C3H6O2 1,3-Dioxolane 13 A 658 1192 534 0.552
C2F2 difluoroacetylene 4 Πg 270 142 -128 1.906
C3H7N Cyclopropylamine 12 A' 989 824 -165 1.201
C3H7N Cyclopropylamine 14 A' 762 451 -311 1.688
C6H8 1,3,5-Hexatriene, (E)- 36 Bu 170 139 -31 1.224
CaO Calcium monoxide 1 Σ 732 567 -165 1.292
GeO2 Germanium dioxide 3 Πu 196 135 -61 1.453
LiOH lithium hydroxide 3 Π 257 431 174 0.596
NaOH sodium hydroxide 3 Π 300 155 -145 1.941
SiF2 Silicon difluoride 2 A1 345 264 -81 1.307
SiF2 Silicon difluoride 2 A1 278 214 -64 1.297
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 221 77 0.652
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 347 -109 1.313
CCl2 dichloromethylene 2 A1 335 279 -57 1.203
CCl2 dichloromethylene 3 B2 758 620 -138 1.223
C5H8 1,3-Pentadiene, (E)- 32 A" 129 212 83 0.609
C5H8 1,3-Pentadiene, (E)- 31 A" 361 260 -101 1.387
CH2+ methylene cation 2 A1 968 797 -171 1.215
C4H9N Cyclobutylamine 19 A' 606 471 -135 1.288
SF6 Sulfur Hexafluoride 6 T2u 347 202 -145 1.719
SF6 Sulfur Hexafluoride 1 A1g 774 604 -169 1.280
SF6 Sulfur Hexafluoride 4 T1u 616 372 -243 1.653
SF6 Sulfur Hexafluoride 5 T2g 525 311 -214 1.685
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 110 -248 3.251
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 887 -249 1.281
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 165 -99 1.597
SO2F2 Sulfuryl fluoride 1 A1 1269 941 -328 1.348
SO2F2 Sulfuryl fluoride 3 A1 544 344 -200 1.579
SO2F2 Sulfuryl fluoride 6 B1 885 710 -175 1.246
SO2F2 Sulfuryl fluoride 9 B2 553 330 -223 1.676
SO2F2 Sulfuryl fluoride 4 A1 385 208 -177 1.849
SO2F2 Sulfuryl fluoride 2 A1 848 655 -193 1.294
SO2F2 Sulfuryl fluoride 5 A2 388 219 -169 1.771
SO2F2 Sulfuryl fluoride 7 B1 539 318 -221 1.694
SO2F2 Sulfuryl fluoride 8 B2 1502 1083 -419 1.386
OH- hydroxide anion 1 Σ 3738 3139 -599 1.191
OH Hydroxyl radical 1 Σ 3738 3321 -417 1.126
OH+ hydoxyl cation 1 Σ 3113 2706 -408 1.151
NF2 Difluoroamino radical 2 A1 573 469 -104 1.222
SiH2Cl2 dichlorosilane 4 A1 188 153 -35 1.230
C4H6 Methylenecyclopropane 17 B1 360 293 -67 1.229
SeO2 Selenium dioxide 2 A1 373 304 -69 1.227
SO2 Sulfur dioxide 3 B2 1362 976 -386 1.395
SO2 Sulfur dioxide 1 A1 1151 876 -276 1.315
SO2 Sulfur dioxide 2 A1 518 370 -147 1.398
SO3 Sulfur trioxide 1 A1' 1065 774 -291 1.376
SO3 Sulfur trioxide 2 A2" 498 293 -205 1.700
SO3 Sulfur trioxide 3 E' 1391 998 -393 1.394
SO3 Sulfur trioxide 4 E' 530 345 -185 1.536
AlCl3 Aluminum trichloride 4 E' 150 125 -25 1.203
C2Cl2+ dichloroacetylene cation 5 Πu 233 162 -71 1.434
ClFO3 Perchloryl fluoride 5 E 589 853 264 0.691
ClFO3 Perchloryl fluoride 6 E 405 189 -216 2.144
SiO2 silicon dioxide 3 Πu 273 185 -88 1.475
BF3+ boron trifluoride cation 3 E' 1662 1079 -583 1.540
BF3+ boron trifluoride cation 4 E' 411 230 -181 1.786
PF5 Phosphorus pentafluoride 1 A1' 816 659 -157 1.237
PF5 Phosphorus pentafluoride 7 E' 174 138 -36 1.258
PF5 Phosphorus pentafluoride 4 A2" 575 409 -166 1.405
PF5 Phosphorus pentafluoride 8 E" 520 350 -170 1.485
PF5 Phosphorus pentafluoride 6 E' 533 378 -155 1.410
HF Hydrogen fluoride 1 Σ 4138 3609 -530 1.147
NH3 Ammonia 2 A1 950 235 -715 4.041
H2SO4 Sulfuric acid 7 A 379 199 -180 1.902
H2SO4 Sulfuric acid 13 B 558 332 -226 1.680
H2SO4 Sulfuric acid 3 A 1136 899 -237 1.264
H2SO4 Sulfuric acid 5 A 548 350 -198 1.564
H2SO4 Sulfuric acid 12 B 882 676 -206 1.304
H2SO4 Sulfuric acid 4 A 831 609 -222 1.365
H2SO4 Sulfuric acid 15 B 288 187 -101 1.542
H2SO4 Sulfuric acid 14 B 506 303 -203 1.668
H2SO4 Sulfuric acid 6 A 422 276 -146 1.530
H2SO4 Sulfuric acid 8 A 224 102 -122 2.194
H2SO4 Sulfuric acid 10 B 1452 1152 -300 1.260
SOCl2 thionyl chloride 2 A' 492 383 -109 1.286
SOCl2 thionyl chloride 4 A' 194 116 -78 1.678
SOCl2 thionyl chloride 3 A' 344 239 -105 1.442
SOCl2 thionyl chloride 5 A" 455 376 -79 1.209
SOCl2 thionyl chloride 1 A' 1251 973 -278 1.286
SOCl2 thionyl chloride 6 A" 284 208 -76 1.367
PCl3 Phosphorus trichloride 4 E 198 136 -62 1.455
H2O2 Hydrogen peroxide 4 A 371 37 -334 10.036
F2O Difluorine monoxide 2 A1 461 383 -78 1.205
NF3 Nitrogen trifluoride 4 E 492 392 -100 1.255
PF3 Phosphorus trifluoride 4 E 344 235 -109 1.461
PF3 Phosphorus trifluoride 2 A1 487 338 -149 1.439
SF4 Sulfur tetrafluoride 1 A1 892 715 -177 1.247
SF4 Sulfur tetrafluoride 3 A1 532 345 -187 1.542
SF4 Sulfur tetrafluoride 9 B2 475 353 -122 1.345
SF4 Sulfur tetrafluoride 7 B1 353 251 -102 1.406
SF4 Sulfur tetrafluoride 4 A1 228 89 -139 2.566
SF4 Sulfur tetrafluoride 5 A2 412 320 -92 1.289
SiF4 Silicon tetrafluoride 4 T2 389 306 -83 1.273
SiF4 Silicon tetrafluoride 2 E 268 200 -68 1.340
AsF5 Arsenic pentafluoride 6 E' 372 301 -71 1.237
AsF5 Arsenic pentafluoride 8 E" 386 313 -73 1.234
HSO3F Fluorosulfonic acid 6 A 823 630 -193 1.307
HSO3F Fluorosulfonic acid 8 A 551 325 -226 1.695
HSO3F Fluorosulfonic acid 2 A 1486 1129 -357 1.316
HSO3F Fluorosulfonic acid 4 A 1150 920 -230 1.251
HSO3F Fluorosulfonic acid 3 A 1243 1008 -235 1.233
HSO3F Fluorosulfonic acid 5 A 896 694 -202 1.291
HSO3F Fluorosulfonic acid 10 A 409 267 -142 1.529
HSO3F Fluorosulfonic acid 9 A 518 321 -197 1.616
HSO3F Fluorosulfonic acid 11 A 390 206 -184 1.894
HSO3F Fluorosulfonic acid 7 A 562 347 -215 1.619
HSO3F Fluorosulfonic acid 12 A 266 143 -123 1.859
FNO3 Fluorine nitrate 7 A' 303 244 -59 1.240
BrF5 bromine pentafluoride 6 B2 281 155 -126 1.812
BrF5 bromine pentafluoride 8 E 415 275 -140 1.511
BrF5 bromine pentafluoride 1 A1 683 555 -128 1.230
BrF5 bromine pentafluoride 4 B1 312 206 -106 1.514
BrF5 bromine pentafluoride 3 A1 369 231 -138 1.598
BrF5 bromine pentafluoride 9 E 237 143 -94 1.661
ClF3 Chlorine trifluoride 4 B1 328 250 -78 1.312
ClF3 Chlorine trifluoride 1 A1 752 603 -149 1.248
ClF3 Chlorine trifluoride 6 B2 442 216 -226 2.043
ClF3 Chlorine trifluoride 3 A1 328 86 -242 3.826
Cl2O Dichlorine monoxide 2 A1 296 243 -53 1.219
SO2Cl2 Sulfuryl chloride 1 A1 1205 882 -323 1.366
SO2Cl2 Sulfuryl chloride 3 A1 408 269 -139 1.519
SO2Cl2 Sulfuryl chloride 6 B1 586 413 -173 1.420
SO2Cl2 Sulfuryl chloride 9 B2 362 220 -142 1.642
SO2Cl2 Sulfuryl chloride 2 A1 577 403 -174 1.431
SO2Cl2 Sulfuryl chloride 4 A1 218 120 -98 1.820
SO2Cl2 Sulfuryl chloride 5 A2 282 167 -115 1.685
SO2Cl2 Sulfuryl chloride 7 B1 388 244 -144 1.592
SO2Cl2 Sulfuryl chloride 8 B2 1434 1040 -394 1.378
ZnCN Zinc monocyanide 3 Π 212 73 -139 2.910
N2O Nitrous oxide 3 Π 589 466 -123 1.265
S2Cl2 Disulfur dichloride 4 A 95 74 -21 1.285
S2Cl2 Disulfur dichloride 2 A 466 377 -89 1.235
S2Cl2 Disulfur dichloride 6 B 244 175 -69 1.394
S2Cl2 Disulfur dichloride 3 A 202 161 -41 1.254
S2Cl2 Disulfur dichloride 5 B 461 378 -83 1.219
SiHCl3 Trichlorosilane 3 A1 254 205 -49 1.236
SiHCl3 Trichlorosilane 6 E 176 141 -35 1.247
NCl3 nitrogen trichloride 2 A1 349 289 -60 1.206
NCl3 nitrogen trichloride 4 E 257 207 -50 1.242
Cl3PO Phosphoryl chloride 2 A1 481 377 -104 1.276
Cl3PO Phosphoryl chloride 3 A1 266 195 -71 1.361
Cl3PO Phosphoryl chloride 4 E 590 468 -122 1.259
Cl3PO Phosphoryl chloride 1 A1 1322 1057 -265 1.250
Cl3PO Phosphoryl chloride 5 E 333 244 -89 1.367
Cl3PO Phosphoryl chloride 6 E 187 132 -55 1.412
SiCl4 Silane, tetrachloro- 4 T2 221 180 -41 1.227
SiCl4 Silane, tetrachloro- 2 E 150 117 -33 1.279
PCl5 Phosphorus pentachloride 5 E' 592 474 -118 1.249
PCl5 Phosphorus pentachloride 6 E' 273 202 -71 1.349
PCl5 Phosphorus pentachloride 8 E" 261 197 -64 1.326
PCl5 Phosphorus pentachloride 2 A1' 370 247 -123 1.496
PCl5 Phosphorus pentachloride 4 A2" 299 231 -68 1.292
PCl5 Phosphorus pentachloride 1 A1' 395 317 -78 1.246
PCl5 Phosphorus pentachloride 7 E' 100 64 -36 1.571
OClO Chlorine dioxide 2 A1 448 293 -154 1.527
OClO Chlorine dioxide 3 B2 1110 753 -358 1.475
OClO Chlorine dioxide 1 A1 946 705 -241 1.342
GeCl2 Germanium dichloride 2 A1 160 133 -27 1.205
N2O4 Dinitrogen tetroxide 9 B2u 265 201 -64 1.317
N2O3 Dinitrogen trioxide 9 A" 63 148 85 0.426
SCl2 Sulfur dichloride 2 A1 208 148 -60 1.401
SCl2 Sulfur dichloride 3 B2 535 436 -99 1.226
C3 carbon trimer 3 Πu 63 160 97 0.396
MgOH magnesium hydroxide 3 Π 188 313 125 0.601
PO2 Phosphorus dioxide 2 A1 397 317 -80 1.252
PO2 Phosphorus dioxide 3 B2 1328 993 -335 1.337
PO2 Phosphorus dioxide 1 A1 1076 847 -229 1.271
S3- Sulfur trimer anion 3 B2 594 467 -127 1.271
S3 Sulfur trimer 1 A1 581 481 -100 1.208
S3 Sulfur trimer 2 A1 281 201 -80 1.400
S3 Sulfur trimer 3 B2 680 528 -152 1.288
F3PO Phosphoryl fluoride 6 E 336 220 -116 1.527
F3PO Phosphoryl fluoride 1 A1 1417 1157 -260 1.224
F3PO Phosphoryl fluoride 3 A1 472 338 -134 1.397
F3PO Phosphoryl fluoride 5 E 482 324 -158 1.487
F3PO Phosphoryl fluoride 2 A1 873 699 -174 1.249
ND3 Ammonia-d3 2 A1 748 181 -567 4.130
SiCl2 Dichlorosilylene 2 A1 201 149 -51 1.344
SiH- silicon monohydride anion 1 Σ 2175 1636 -539 1.330
SF2 sulfur difluoride 2 A1 355 242 -113 1.469
HPO HPO 2 A' 1188 975 -213 1.219
SO Sulfur monoxide 1 Σ 1151 938 -213 1.227
SO+ sulfur monoxide cation 1 Σ 1360 1051 -309 1.293
H3O+ hydronium 2 A1 954 682 -272 1.399
ZnH2 Zinc hydride 3 Πu 633 485 -147 1.304
PO Phosphorus monoxide 1 Σ 1233 1015 -219 1.216
PO+ phosphorus monoxide cation 1 Σ 1405 1148 -257 1.224
ClONO2 Chlorine nitrate 7 A' 273 207 -67 1.322
PF+ phosphorus monofluoride cation 1 Σ 1053 860 -193 1.225
PCl phosphorus chloride 1 Σ 577 469 -108 1.230
ClOO chloroperoxy radical 3 A' 201 313 111 0.644
SiCl3 trichlorosilyl radical 1 A1 470 389 -81 1.208
B2H6 Diborane 14 B2u 368 304 -64 1.212
SSO Disulfur monoxide 1 A' 1166 896 -270 1.302
SSO Disulfur monoxide 3 A' 380 276 -104 1.377
SSO Disulfur monoxide 2 A' 679 521 -158 1.303
OBrO OBrO 2 A1 312 250 -62 1.249
OBrO OBrO 3 B2 849 683 -166 1.243
OBrO OBrO 1 A1 799 654 -145 1.222
S2 Sulfur diatomic 1 Σg 726 592 -133 1.225
GeH2 germylene 2 A1 916 1773 857 0.517
GeH2 germylene 1 A1 1856 897 -959 2.068
Mg2 Magnesium diatomic 1 Σg 51 114 63 0.448
ClS2 Sulfur chloride 3 A' 196 158 -38 1.239
ClS2 Sulfur chloride 2 A' 450 364 -86 1.236
ZnCH3 Zinc monomethyl 6 E 315 627 312 0.502