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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 PBEPBE/6-311G**
Calculated values were scaled by 0.9909.

Species Name mode Symmetry Experiment Theory difference ratio
C3H4O2 β–Propiolactone 21 A" 113 179 66 0.630
CH3CONH2 Acetamide 20 A 259 173 -86 1.494
CH3COOH Acetic acid 18 A" 93 68 -25 1.370
CH3OH Methyl alcohol 12 A" 200 327 127 0.611
C2H6O2S Dimethyl sulfone 13 A2 326 271 -55 1.201
C2H6O2S Dimethyl sulfone 20 B1 262 203 -59 1.294
CH3CCl3 Ethane, 1,1,1-trichloro- 6 A2 214 307 93 0.696
CH3NH2 methyl amine 14 A" 1195 946 -249 1.263
CHONH2 formamide 12 A" 289 214 -75 1.349
CH3COCl Acetyl Chloride 15 A" 166 135 -31 1.229
CBr2F2 Methane, dibromodifluoro- 3 A1 140 314 174 0.445
C2F6 hexafluoroethane 4 A1u 68 50 -18 1.364
CHOCH(CH3)CH3 Propanal, 2-methyl- 16 A' 632 526 -106 1.202
CHOCH(CH3)CH3 Propanal, 2-methyl- 33 A" 75 61 -14 1.229
C6H4O2 parabenzoquinone 30 B3u 109 90 -18 1.201
C3H6O 2-Propen-1-ol 24 A 188 115 -73 1.632
C3H6O 2-Propen-1-ol 21 A 554 434 -121 1.278
CH3OCHO methyl formate 18 A" 130 90 -40 1.440
C4H8O Furan, tetrahydro- 33 B 137 42 -95 3.224
C4H8O2 1,4-Dioxane 19 Au 288 235 -53 1.224
C5H8 Cyclopentene 18 A' 254 144 -110 1.764
C3H3NO Isoxazole 14 A" 1033 855 -178 1.209
C4H4N2 Pyridazine 13 A2 421 341 -80 1.235
C4H6O2 2,3-Butanedione 13 Au 1111 900 -211 1.235
C4H6O2 2,3-Butanedione 21 Bg 240 82 -158 2.910
C4H6O2 2,3-Butanedione 9 Ag 614 499 -115 1.231
C4H6O2 2,3-Butanedione 16 Au 48 38 -10 1.253
C5H12 Propane, 2,2-dimethyl- 12 T1 203 310 107 0.655
C2H3NO3 Oxamic acid 16 A" 984 795 -189 1.237
C2H3NO3 Oxamic acid 15 A' 328 257 -71 1.274
C2H3NO3 Oxamic acid 17 A" 815 669 -146 1.217
C2H3NO3 Oxamic acid 21 A" 162 73 -89 2.219
C2H3NO3 Oxamic acid 3 A' 2600 3470 870 0.749
C3H6O Oxetane 23 B2 1228 999 -229 1.230
C3H6O Oxetane 12 A2 986 816 -170 1.208
C3H6O Oxetane 18 B1 90 68 -22 1.323
C5H8 1,4-Pentadiene 31 B 721 590 -131 1.222
C5H8 1,4-Pentadiene 33 B 331 101 -230 3.268
C5H8 1,4-Pentadiene 17 A 102 85 -17 1.205
C5H8 1,4-Pentadiene 16 A 137 290 153 0.472
C6H10 1,5-Hexadiene 29 Bg 264 185 -79 1.428
C6H10 1,5-Hexadiene 14 Ag 351 253 -98 1.387
COBr2 Carbonic dibromide 6 B2 512 326 -186 1.570
COBr2 Carbonic dibromide 4 B1 757 495 -262 1.528
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 186 -41 1.222
CH3ONO Methyl nitrite 15 A" 186 138 -48 1.344
C3H6O2 1,3-Dioxolane 5 A 1480 2889 1409 0.512
C3H6O2 1,3-Dioxolane 4 A 1509 2928 1419 0.515
C3H6O2 1,3-Dioxolane 6 A 1361 2810 1449 0.484
C3H6O2 1,3-Dioxolane 13 A 658 1219 561 0.540
C3H7N Cyclopropylamine 12 A' 989 815 -174 1.213
C6H8 1,3,5-Hexatriene, (E)- 36 Bu 170 141 -29 1.202
ZnS Zinc sulfide 1 Σ 459 362 -97 1.268
C5H8 1,3-Pentadiene, (E)- 32 A" 129 203 74 0.636
C5H8 1,3-Pentadiene, (E)- 31 A" 361 253 -108 1.426
CH3 Methyl radical 2 A2" 606 492 -115 1.233
CH2OH Hydroxymethyl radical 9 A 234 434 200 0.539
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 102 -256 3.497
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 868 -268 1.309
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 154 -110 1.709
C4H6 Methylenecyclopropane 17 B1 360 271 -89 1.327
C2Cl2 dichloroacetylene 4 Πg 333 226 -107 1.475
C2Cl2+ dichloroacetylene cation 5 Πu 233 181 -52 1.290
ClFO3 Perchloryl fluoride 3 A1 549 445 -104 1.235
ClFO3 Perchloryl fluoride 6 E 405 319 -86 1.269
BF3+ boron trifluoride cation 3 E' 1662 1105 -557 1.504
BF3+ boron trifluoride cation 4 E' 411 265 -146 1.550
SOCl2 thionyl chloride 4 A' 194 158 -36 1.231
SF4 Sulfur tetrafluoride 3 A1 532 432 -100 1.233
SF4 Sulfur tetrafluoride 7 B1 353 288 -65 1.225
SF4 Sulfur tetrafluoride 4 A1 228 179 -49 1.273
BrF5 bromine pentafluoride 6 B2 281 180 -101 1.562
BrF5 bromine pentafluoride 8 E 415 324 -91 1.282
BrF5 bromine pentafluoride 4 B1 312 260 -52 1.200
BrF5 bromine pentafluoride 3 A1 369 288 -81 1.280
ClF3 Chlorine trifluoride 1 A1 752 612 -140 1.229
ClF3 Chlorine trifluoride 6 B2 442 326 -116 1.355
ClF3 Chlorine trifluoride 3 A1 328 227 -101 1.443
Cl2O Dichlorine monoxide 3 B2 686 512 -174 1.341
SO2Cl2 Sulfuryl chloride 3 A1 408 336 -72 1.215
SO2Cl2 Sulfuryl chloride 4 A1 218 181 -37 1.204
SO2Cl2 Sulfuryl chloride 7 B1 388 321 -67 1.208
ZnCN Zinc monocyanide 3 Π 212 171 -41 1.237
ZnCl Zinc monochloride 1 Σ 391 259 -131 1.507
BrOCl BrOCl 1 A' 676 561 -115 1.205
S2Cl2 Disulfur dichloride 2 A 466 382 -84 1.221
S2Cl2 Disulfur dichloride 5 B 461 367 -94 1.257
NCl3 nitrogen trichloride 3 E 642 497 -145 1.293
PCl5 Phosphorus pentachloride 2 A1' 370 247 -123 1.497
PCl5 Phosphorus pentachloride 7 E' 100 79 -21 1.258
N2O4 Dinitrogen tetroxide 9 B2u 265 194 -71 1.369
N2O3 Dinitrogen trioxide 9 A" 63 142 79 0.445
SCl2 Sulfur dichloride 3 B2 535 445 -90 1.203
CaOH Calcium monohydroxide 2 Σ 353 648 295 0.545
CaOH Calcium monohydroxide 3 Π 609 329 -280 1.850
C4 Carbon tetramer 4 Πg 323 147 -176 2.196
C4 Carbon tetramer 5 Πu 160 127 -33 1.260
S3- Sulfur trimer anion 3 B2 594 491 -103 1.210
SiH- silicon monohydride anion 1 Σ 2175 1740 -435 1.250
SF2 sulfur difluoride 2 A1 355 294 -61 1.206
ZnH Zinc monohydride 1 Σ 1608 1205 -403 1.334
ClONO2 Chlorine nitrate 7 A' 273 218 -55 1.254
B2H6 Diborane 14 B2u 368 302 -66 1.219
BrOBr Bromine oxide 3 B2 629 498 -131 1.263
GeH2 germylene 2 A1 916 1803 887 0.508
GeH2 germylene 1 A1 1856 904 -952 2.054
Mg2 Magnesium diatomic 1 Σg 51 102 51 0.503
ClS2 Sulfur chloride 2 A' 450 366 -84 1.230
ZnCH3 Zinc monomethyl 6 E 315 591 276 0.533