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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 BLYP/6-31G**
Calculated values were scaled by 0.9923.

Species Name mode Symmetry Experiment Theory difference ratio
CH3CONH2 Acetamide 20 A 259 136 -122 1.897
CH3COOH Acetic acid 18 A" 93 67 -26 1.389
CH3OH Methyl alcohol 12 A" 200 332 132 0.602
CH3COCH3 Acetone 12 A2 77 41 -36 1.863
CH3SOCH3 Dimethyl sulfoxide 23 A" 333 275 -58 1.209
C2H6O2S Dimethyl sulfone 13 A2 326 259 -67 1.260
C2H6O2S Dimethyl sulfone 20 B1 262 203 -59 1.289
C2H2 Acetylene 4 Πg 612 457 -155 1.338
CH3NH2 methyl amine 14 A" 1195 953 -242 1.254
CHONH2 formamide 12 A" 289 88 -201 3.288
CH3COCl Acetyl Chloride 15 A" 166 128 -38 1.296
CBr2F2 Methane, dibromodifluoro- 3 A1 140 301 161 0.466
CH3COOCH3 methyl acetate 26 A" 136 104 -32 1.310
CH3COOCH3 methyl acetate 27 A" 110 18 -92 6.080
C3H6O 2-Propen-1-ol 24 A 188 113 -75 1.665
C3H6O 2-Propen-1-ol 21 A 554 432 -123 1.284
CH3OCHO methyl formate 18 A" 130 98 -32 1.324
C4H8O Furan, tetrahydro- 33 B 137 21 -116 6.479
C2F4 Tetrafluoroethylene 7 B2g 508 404 -104 1.256
C2Cl4 Tetrachloroethylene 4 Au 110 91 -19 1.211
C3H3NO Isoxazole 14 A" 1033 856 -177 1.207
C2H3N3 1H-1,2,4-Triazole 18 A" 640 506 -134 1.264
C4H6O2 2,3-Butanedione 13 Au 1111 920 -191 1.207
C4H6O2 2,3-Butanedione 21 Bg 240 97 -143 2.485
C4H6O2 2,3-Butanedione 9 Ag 614 495 -119 1.241
C4H2 Diacetylene 8 Πu 630 522 -108 1.207
C5H12 Propane, 2,2-dimethyl- 12 T1 203 306 103 0.663
C3H6O Oxetane 23 B2 1228 971 -257 1.265
C3H6O Oxetane 12 A2 986 818 -168 1.206
C3H6O Oxetane 18 B1 90 64 -26 1.402
C3O2 Carbon suboxide 7 Πu 61 134 73 0.456
C5H8 1,4-Pentadiene 31 B 721 591 -130 1.220
C5H8 1,4-Pentadiene 33 B 331 102 -229 3.232
C5H8 1,4-Pentadiene 16 A 137 290 153 0.472
C6H10 1,5-Hexadiene 29 Bg 264 183 -81 1.446
C6H10 1,5-Hexadiene 14 Ag 351 257 -94 1.364
COBr2 Carbonic dibromide 6 B2 512 308 -204 1.663
COBr2 Carbonic dibromide 4 B1 757 483 -274 1.568
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 185 -42 1.225
CH3ONO Methyl nitrite 9 A' 627 521 -107 1.205
CH3ONO Methyl nitrite 15 A" 186 129 -57 1.441
C4H6O Cyclobutanone 12 A2 1163 913 -250 1.273
C4H6O Cyclobutanone 20 B1 63 3 -60 24.400
C4H6O Cyclobutanone 13 A2 909 601 -308 1.513
GeO2 Germanium dioxide 3 Πu 196 156 -40 1.255
CCl2 dichloromethylene 3 B2 758 626 -132 1.211
C5H8 1,3-Pentadiene, (E)- 32 A" 129 206 77 0.626
C5H8 1,3-Pentadiene, (E)- 31 A" 361 254 -107 1.420
CH3 Methyl radical 2 A2" 606 457 -149 1.327
C4H9N Cyclobutylamine 21 A' 174 136 -38 1.276
SF6 Sulfur Hexafluoride 6 T2u 347 289 -58 1.201
SF6 Sulfur Hexafluoride 5 T2g 525 437 -88 1.201
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 106 -252 3.363
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 869 -267 1.307
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 159 -105 1.662
SO2F2 Sulfuryl fluoride 9 B2 553 460 -93 1.202
SO2F2 Sulfuryl fluoride 4 A1 385 315 -70 1.222
SO2F2 Sulfuryl fluoride 5 A2 388 316 -72 1.228
SO2F2 Sulfuryl fluoride 7 B1 539 447 -92 1.207
C4H6 Methylenecyclopropane 17 B1 360 275 -85 1.308
C2Cl2 dichloroacetylene 4 Πg 333 197 -136 1.688
ClFO3 Perchloryl fluoride 3 A1 549 433 -116 1.267
ClFO3 Perchloryl fluoride 5 E 589 472 -117 1.249
ClFO3 Perchloryl fluoride 6 E 405 306 -99 1.324
H2SO4 Sulfuric acid 7 A 379 312 -66 1.212
SOCl2 thionyl chloride 4 A' 194 148 -46 1.314
SOCl2 thionyl chloride 3 A' 344 285 -59 1.208
SOCl2 thionyl chloride 5 A" 455 378 -77 1.202
PCl3 Phosphorus trichloride 4 E 198 162 -36 1.219
AsH3+ Arsine cation 2 A1 452 690 238 0.656
HSO3F Fluorosulfonic acid 8 A 551 453 -98 1.215
HSO3F Fluorosulfonic acid 11 A 390 310 -80 1.257
BrF5 bromine pentafluoride 6 B2 281 179 -102 1.569
BrF5 bromine pentafluoride 8 E 415 326 -89 1.271
BrF5 bromine pentafluoride 3 A1 369 288 -81 1.280
ClF3 Chlorine trifluoride 6 B2 442 334 -108 1.325
ClF3 Chlorine trifluoride 3 A1 328 235 -93 1.394
Cl2O Dichlorine monoxide 3 B2 686 512 -174 1.339
BrOCl BrOCl 1 A' 676 561 -115 1.206
S2Cl2 Disulfur dichloride 2 A 466 370 -96 1.258
S2Cl2 Disulfur dichloride 5 B 461 358 -103 1.286
NCl3 nitrogen trichloride 3 E 642 478 -164 1.344
PCl5 Phosphorus pentachloride 2 A1' 370 244 -126 1.519
PCl5 Phosphorus pentachloride 3 A2" 465 386 -79 1.205
PCl5 Phosphorus pentachloride 7 E' 100 78 -22 1.278
N2O3 Dinitrogen trioxide 9 A" 63 138 75 0.457
SCl2 Sulfur dichloride 3 B2 535 435 -100 1.229
CaOH Calcium monohydroxide 2 Σ 353 598 245 0.590
CaOH Calcium monohydroxide 3 Π 609 281 -328 2.167
Cu2 Copper dimer 1 Σg 265 407 143 0.649
S3- Sulfur trimer anion 3 B2 594 485 -109 1.225
SiH- silicon monohydride anion 1 Σ 2175 1724 -451 1.262
ZnH2 Zinc hydride 3 Πu 633 471 -162 1.344
ClONO2 Chlorine nitrate 7 A' 273 211 -62 1.294
BrOBr Bromine oxide 3 B2 629 497 -132 1.266
GeH2 germylene 2 A1 916 1904 988 0.481
GeH2 germylene 1 A1 1856 918 -938 2.022
HNB hydrogen nitrogen boron 3 Π 433 351 -82 1.233
ZnCH3 Zinc monomethyl 6 E 315 602 287 0.524
C2F6 hexafluoroethane 4 A1u 68 43 -25 1.595
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 521 -111 1.213
C4H8O2 1,4-Dioxane 19 Au 288 239 -49 1.203
C4H4N2 Pyridazine 13 A2 421 350 -71 1.201
C2H3NO3 Oxamic acid 16 A" 984 770 -214 1.278
SO2Cl2 Sulfuryl chloride 3 A1 408 319 -89 1.277
C3 carbon trimer 3 Πu 63 170 107 0.372
C5H8 Cyclopentene 18 A' 254 130 -124 1.953
C2H4O3 trioxolane124 21 B 193 155 -38 1.248
C2H3NO3 Oxamic acid 21 A" 162 66 -96 2.441
C3H8O2S (Methylsulphonyl)ethane 33 ?a 257 211 -46 1.218
OH- hydroxide anion 1 Σ 3738 3308 -430 1.130
SF4 Sulfur tetrafluoride 3 A1 532 435 -97 1.224
N2O4 Dinitrogen tetroxide 9 B2u 265 173 -92 1.534
C2H3NO3 Oxamic acid 3 A' 2600 3464 864 0.751
C2H3NO3 Oxamic acid 15 A' 328 258 -70 1.271
C2H3NO3 Oxamic acid 17 A" 815 665 -150 1.225
C3H8O2S (Methylsulphonyl)ethane 29 ?a 491 404 -87 1.217
C3H7N Cyclopropylamine 12 A' 989 823 -166 1.202
C2Cl2+ dichloroacetylene cation 5 Πu 233 174 -59 1.337
BF3+ boron trifluoride cation 4 E' 411 277 -134 1.486
SF4 Sulfur tetrafluoride 7 B1 353 294 -59 1.200
SO2Cl2 Sulfuryl chloride 4 A1 218 170 -48 1.279
SO2Cl2 Sulfuryl chloride 5 A2 282 232 -50 1.217
SO2Cl2 Sulfuryl chloride 7 B1 388 303 -85 1.279
ClS2 Sulfur chloride 2 A' 450 353 -97 1.276
C3H4O2 β–Propiolactone 21 A" 113 179 66 0.631
CH3NO2 Methane, nitro- 11 A" 1583 3082 1499 0.514
BF3+ boron trifluoride cation 3 E' 1662 1119 -542 1.485
SF4 Sulfur tetrafluoride 4 A1 228 168 -60 1.357
SF2 sulfur difluoride 2 A1 355 289 -66 1.230
C3H8O2S (Methylsulphonyl)ethane 32 ?a 324 263 -61 1.230
CH3SSCH3 Disulfide, dimethyl 13 A 117 97 -20 1.211