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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 CID/6-31G
Calculated values were scaled by 0.9352.

Species Name mode Symmetry Experiment Theory difference ratio
CHONH2 formamide 12 A" 289 459 171 0.629
CH3COOCH3 methyl acetate 27 A" 110 87 -23 1.263
C6H4O2 parabenzoquinone 30 B3u 109 88 -21 1.235
C3H2N2 Malononitrile 6 A1 167 137 -30 1.216
C4H8O Furan, tetrahydro- 17 A 286 233 -53 1.226
C4H8O Furan, tetrahydro- 33 B 137 68 -69 2.001
C2H4O3 trioxolane124 21 B 193 155 -38 1.245
C2H3NO3 Oxamic acid 16 A" 984 762 -222 1.292
C2H3NO3 Oxamic acid 18 A" 745 589 -156 1.264
C2H3NO3 Oxamic acid 21 A" 162 59 -103 2.744
C5H8 1,4-Pentadiene 16 A 137 288 151 0.475
COBr2 Carbonic dibromide 6 B2 512 328 -184 1.563
CH3SSCH3 Disulfide, dimethyl 11 A 240 193 -47 1.241
CH3SSCH3 Disulfide, dimethyl 23 B 274 221 -53 1.241
HCCCN Cyanoacetylene 6 Π 499 275 -224 1.811
GeO2 Germanium dioxide 3 Πu 196 116 -79 1.683
ZnS Zinc sulfide 1 Σ 459 380 -79 1.208
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 217 73 0.663
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 344 -112 1.326
C5H8 1,3-Pentadiene, (Z)- 32 A" 171 99 -72 1.732
CCl2 dichloromethylene 2 A1 335 276 -59 1.215
CCl2 dichloromethylene 3 B2 758 577 -181 1.315
C5H10S 2H-Thiopyran, tetrahydro- 23 A' 194 161 -33 1.204
SF6 Sulfur Hexafluoride 1 A1g 774 634 -139 1.220
SF6 Sulfur Hexafluoride 6 T2u 347 235 -112 1.475
SO2F2 Sulfuryl fluoride 1 A1 1269 878 -391 1.445
SO2F2 Sulfuryl fluoride 3 A1 544 365 -179 1.491
SO2F2 Sulfuryl fluoride 4 A1 385 252 -133 1.529
SO2F2 Sulfuryl fluoride 9 B2 553 359 -194 1.539
H2CCCCH2 Butatriene 18 B3u 215 177 -38 1.212
OH- hydroxide anion 1 Σ 3738 2993 -745 1.249
CCl+ carbon monochloride cation 1 Σ 1175 963 -212 1.220
SiH2Cl2 dichlorosilane 4 A1 188 151 -37 1.241
SeS- selenium monosulfide anion 1 Σ 469 357 -112 1.314
KCl Potassium Chloride 1 Σ 281 228 -53 1.233
C2Cl2+ dichloroacetylene cation 4 Πg 318 253 -65 1.258
SOCl2 thionyl chloride 2 A' 492 361 -131 1.363
SOCl2 thionyl chloride 4 A' 194 128 -66 1.516
SF4 Sulfur tetrafluoride 3 A1 532 411 -121 1.294
BrF5 bromine pentafluoride 6 B2 281 210 -71 1.335
BrF5 bromine pentafluoride 9 E 237 189 -48 1.257
SCl2 Sulfur dichloride 2 A1 208 147 -61 1.416
SCl2 Sulfur dichloride 3 B2 535 404 -131 1.323
NaK Sodium Potassium 1 Σ 124 103 -21 1.207
S3- Sulfur trimer anion 3 B2 594 -736 -1331 -0.807
S3 Sulfur trimer 1 A1 581 474 -107 1.226
BF Boron monofluoride 1 Σ 1402 1152 -250 1.217
BrF+ bromine fluoride cation 1 Σ 750 1340 590 0.560
AlH+ aluminum monohydride cation 1 Σ 1620 1298 -322 1.248
H3O+ hydronium 2 A1 954 501 -453 1.903
SCN thiocyanato radical 2 Σ 762 608 -154 1.254
PF+ phosphorus monofluoride cation 1 Σ 1053 850 -203 1.239
SiCl3 trichlorosilyl radical 3 E 582 483 -99 1.206
OBrO OBrO 2 A1 312 249 -63 1.254
OBrO OBrO 3 B2 849 669 -179 1.268
NCO isocyanato radical 1 Σ 1921 1496 -425 1.284
GeH2 germylene 1 A1 1856 874 -982 2.122
ZnCH3 Zinc monomethyl 6 E 315 612 297 0.515
HOCN cyanic acid 5 A' 460 347 -113 1.327
C4H6O2 2,3-Butanedione 21 Bg 240 114 -126 2.099
C2H3NO3 Oxamic acid 3 A' 2600 3484 884 0.746
C2H3NO3 Oxamic acid 15 A' 328 271 -57 1.211
C2H3NO3 Oxamic acid 17 A" 815 633 -182 1.287
C5H8 1,4-Pentadiene 17 A 102 82 -20 1.245
COBr2 Carbonic dibromide 4 B1 757 478 -279 1.583
CH3SSCH3 Disulfide, dimethyl 10 A 509 409 -100 1.243
HCCCN Cyanoacetylene 7 Π 222 184 -38 1.206
CCl2 dichloromethylene 1 A1 730 590 -140 1.237
SO2F2 Sulfuryl fluoride 2 A1 848 691 -157 1.226
SO2F2 Sulfuryl fluoride 5 A2 388 240 -148 1.617
SO2F2 Sulfuryl fluoride 7 B1 539 329 -210 1.640
SO2F2 Sulfuryl fluoride 8 B2 1502 962 -540 1.561
H2CCCCH2 Butatriene 10 B2g 544 130 -414 4.190
SiH2Cl2 dichlorosilane 3 A1 527 426 -101 1.236
C2Cl2+ dichloroacetylene cation 5 Πu 233 153 -80 1.522
BF3+ boron trifluoride cation 4 E' 411 339 -72 1.211
SOCl2 thionyl chloride 3 A' 344 248 -96 1.387
SOCl2 thionyl chloride 5 A" 455 353 -102 1.289
HN3 hydrogen azide 6 A" 607 455 -152 1.333
BrF5 bromine pentafluoride 4 B1 312 256 -56 1.221
ZnCN Zinc monocyanide 3 Π 212 160 -52 1.323
GeCl2 Germanium dichloride 1 A1 409 327 -82 1.252
S3 Sulfur trimer 2 A1 281 204 -77 1.378
AlCl Aluminum monochloride 1 Σ 482 370 -112 1.303
ZnH2 Zinc hydride 3 Πu 633 478 -154 1.323
ClONO2 Chlorine nitrate 9 A" 124 93 -31 1.333
SCN thiocyanato radical 1 Σ 1942 2381 439 0.816
SiCl3 trichlorosilyl radical 1 A1 470 376 -94 1.250
OBrO OBrO 1 A1 799 640 -159 1.249
GeH2 germylene 2 A1 916 1735 819 0.528
HCCF Fluoroacetylene 5 Π 367 300 -67 1.225
SiH2Cl2 dichlorosilane 9 B2 590 483 -107 1.222
SeS Selenium monosulfide 1 Σ 556 434 -121 1.280
SOCl2 thionyl chloride 1 A' 1251 981 -270 1.275
SOCl2 thionyl chloride 6 A" 284 199 -85 1.424
SF4 Sulfur tetrafluoride 4 A1 228 103 -125 2.218
ClF+ clorine monofluoride cation 1 Σ 870 1470 600 0.592
SCl2 Sulfur dichloride 1 A1 525 396 -129 1.325
Si2 Silicon diatomic 1 Σg 511 416 -95 1.229
SiH- silicon monohydride anion 1 Σ 2175 1571 -604 1.384
SF2 sulfur difluoride 2 A1 355 264 -91 1.342
SO+ sulfur monoxide cation 1 Σ 1360 1104 -256 1.232
DF Hydrofluoric acid-d 1 Σ 2998 2592 -406 1.157
CBr2F2 Methane, dibromodifluoro- 3 A1 140 305 165 0.458
HCNO fulminic acid 5 Π 224 348 123 0.645
C5H8 1,4-Pentadiene 31 B 721 593 -128 1.216
C5H8 1,4-Pentadiene 33 B 331 84 -247 3.922
CH3SSCH3 Disulfide, dimethyl 13 A 117 72 -45 1.622
SiF2 Silicon difluoride 2 A1 278 232 -46 1.201
SF6 Sulfur Hexafluoride 4 T1u 616 420 -195 1.465
SF6 Sulfur Hexafluoride 5 T2g 525 352 -173 1.493