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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 PBEPBEultrafine/6-31G*
Calculated values were scaled by 0.9835.

Species Name mode Symmetry Experiment Theory difference ratio
C5H8 1,3-Pentadiene, (E)- 31 A" 361 253 -108 1.428
C4H6 Methylenecyclopropane 17 B1 360 273 -87 1.321
ClFO3 Perchloryl fluoride 3 A1 549 454 -95 1.208
ClFO3 Perchloryl fluoride 5 E 589 489 -100 1.204
ClFO3 Perchloryl fluoride 6 E 405 319 -86 1.268
Cl2O Dichlorine monoxide 3 B2 686 550 -136 1.248
PCl5 Phosphorus pentachloride 7 E' 100 82 -18 1.225
C3 carbon trimer 3 Πu 63 109 46 0.581
C4 Carbon tetramer 4 Πg 323 210 -113 1.537
B2H6 Diborane 14 B2u 368 294 -74 1.251
Mg2 Magnesium diatomic 1 Σg 51 103 52 0.496
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 185 -42 1.226
CH3ONO Methyl nitrite 15 A" 186 140 -46 1.327
CH3COCH3 Acetone 12 A2 77 46 -31 1.675
C2H6O2S Dimethyl sulfone 13 A2 326 262 -64 1.243
C2H6O2S Dimethyl sulfone 20 B1 262 202 -60 1.297
CHONH2 formamide 12 A" 289 72 -216 3.992
CH3COCl Acetyl Chloride 15 A" 166 129 -37 1.286
C2F6 hexafluoroethane 4 A1u 68 48 -20 1.403
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 522 -110 1.210
C3H3NO Isoxazole 14 A" 1033 844 -189 1.224
C4H4N2 Pyridazine 13 A2 421 341 -80 1.235
NH2CN cyanamide 5 A' 408 588 180 0.693
C2H3NO3 Oxamic acid 16 A" 984 773 -211 1.272
C3H6O Oxetane 23 B2 1228 1010 -218 1.216
C3H2N2 Malononitrile 6 A1 167 138 -29 1.214
C2F4 Tetrafluoroethylene 7 B2g 508 413 -95 1.229
C5H8 Cyclopentene 18 A' 254 143 -111 1.778
C4H2 Diacetylene 8 Πu 630 503 -127 1.253
C2H3NO3 Oxamic acid 21 A" 162 67 -95 2.403
C3H6O Oxetane 18 B1 90 34 -55 2.609
C3O2 Carbon suboxide 7 Πu 61 123 62 0.494
C5H8 1,4-Pentadiene 16 A 137 286 149 0.479
C6H10 1,5-Hexadiene 14 Ag 351 256 -95 1.373
C3H6O2 1,3-Dioxolane 6 A 1361 2846 1485 0.478
C3H6O2 1,3-Dioxolane 13 A 658 1208 550 0.544
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 870 -266 1.306
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 163 -101 1.621
C2Cl2 dichloroacetylene 4 Πg 333 201 -132 1.656
AsH3+ Arsine cation 2 A1 452 665 213 0.679
HSO3F Fluorosulfonic acid 11 A 390 313 -77 1.244
N2O4 Dinitrogen tetroxide 9 B2u 265 187 -78 1.416
CH3COOH Acetic acid 18 A" 93 60 -33 1.559
C2H2 Acetylene 4 Πg 612 444 -168 1.378
C3H6O 2-Propen-1-ol 21 A 554 430 -124 1.288
C5H8 1,4-Pentadiene 17 A 102 84 -18 1.218
C6H10 1,5-Hexadiene 29 Bg 264 185 -79 1.427
C3H6O2 1,3-Dioxolane 4 A 1509 2899 1390 0.520
C6H10 2-Hexyne 25 A' 115 95 -20 1.208
C6H8 1,3,5-Hexatriene, (E)- 36 Bu 170 139 -31 1.219
C3H6O 2-Propen-1-ol 24 A 188 113 -75 1.666
C5H12 Pentane 23 A2 131 108 -23 1.213
C2H3NO3 Oxamic acid 3 A' 2600 3447 847 0.754
C2H3NO3 Oxamic acid 15 A' 328 253 -75 1.295
C2H3NO3 Oxamic acid 17 A" 815 673 -142 1.211
C3H6O Oxetane 12 A2 986 813 -173 1.214
C5H8 1,3-Pentadiene, (E)- 32 A" 129 208 79 0.621
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 107 -251 3.330
ClF3 Chlorine trifluoride 6 B2 442 353 -89 1.252
SO2Cl2 Sulfuryl chloride 4 A1 218 180 -38 1.213
PCl5 Phosphorus pentachloride 2 A1' 370 258 -112 1.432
C3H4O2 β–Propiolactone 21 A" 113 179 66 0.632
CH3OH Methyl alcohol 12 A" 200 347 147 0.577
CH3NH2 methyl amine 14 A" 1195 949 -246 1.259
CH3 Methyl radical 2 A2" 606 459 -148 1.323
CH2OH Hydroxymethyl radical 9 A 234 446 212 0.525
SF4 Sulfur tetrafluoride 4 A1 228 171 -57 1.330
ClF3 Chlorine trifluoride 3 A1 328 256 -72 1.283
N2O3 Dinitrogen trioxide 9 A" 63 139 76 0.455
SF2 sulfur difluoride 2 A1 355 295 -60 1.204
C3H6O 2-Propen-1-ol 22 A 377 312 -66 1.211
C2H3N3 1H-1,2,4-Triazole 18 A" 640 520 -120 1.231
C5H8 1,4-Pentadiene 31 B 721 585 -136 1.233
C5H8 1,4-Pentadiene 33 B 331 99 -232 3.328
C3H6O2 1,3-Dioxolane 5 A 1480 2881 1401 0.514
LiOH lithium hydroxide 3 Π 257 205 -51 1.251
CH3CONH2 Acetamide 20 A 259 161 -97 1.604