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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 CISD/6-31G
Calculated values were scaled by 0.9378.

Species Name mode Symmetry Experiment Theory difference ratio
CHONH2 formamide 12 A" 289 462 174 0.624
CH3COOCH3 methyl acetate 27 A" 110 85 -25 1.287
C6H4O2 parabenzoquinone 30 B3u 109 88 -20 1.230
C3H2N2 Malononitrile 6 A1 167 138 -29 1.212
C4H8O Furan, tetrahydro- 17 A 286 235 -51 1.219
C4H8O Furan, tetrahydro- 33 B 137 68 -69 2.009
C2H4O3 trioxolane124 21 B 193 155 -38 1.245
C2H3NO3 Oxamic acid 16 A" 984 763 -221 1.290
C2H3NO3 Oxamic acid 18 A" 745 593 -152 1.257
C2H3NO3 Oxamic acid 21 A" 162 59 -103 2.725
C5H8 1,4-Pentadiene 16 A 137 289 152 0.474
COBr2 Carbonic dibromide 6 B2 512 326 -186 1.572
HCCCN Cyanoacetylene 6 Π 499 275 -224 1.813
GeO2 Germanium dioxide 3 Πu 196 116 -79 1.683
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 218 74 0.662
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 345 -111 1.321
C5H8 1,3-Pentadiene, (Z)- 32 A" 171 100 -71 1.705
CCl2 dichloromethylene 2 A1 335 273 -62 1.227
CCl2 dichloromethylene 3 B2 758 569 -189 1.332
C5H10S 2H-Thiopyran, tetrahydro- 23 A' 194 161 -33 1.203
SO2F2 Sulfuryl fluoride 1 A1 1269 872 -397 1.456
SO2F2 Sulfuryl fluoride 3 A1 544 361 -183 1.506
SO2F2 Sulfuryl fluoride 4 A1 385 250 -135 1.539
SO2F2 Sulfuryl fluoride 9 B2 553 357 -196 1.550
OH- hydroxide anion 1 Σ 3738 2954 -784 1.266
CCl+ carbon monochloride cation 1 Σ 1175 921 -254 1.276
SiH2Cl2 dichlorosilane 4 A1 188 151 -37 1.244
SeS- selenium monosulfide anion 1 Σ 469 353 -116 1.328
KCl Potassium Chloride 1 Σ 281 228 -53 1.232
C2Cl2+ dichloroacetylene cation 4 Πg 318 264 -54 1.205
HCl+ hydrogen chloride cation 1 Σ 2674 2259 -415 1.184
SOCl2 thionyl chloride 2 A' 492 362 -130 1.357
SOCl2 thionyl chloride 4 A' 194 128 -66 1.520
SF4 Sulfur tetrafluoride 3 A1 532 410 -122 1.298
BrF5 bromine pentafluoride 6 B2 281 210 -71 1.340
BrF5 bromine pentafluoride 9 E 237 188 -49 1.262
GeCl2 Germanium dichloride 2 A1 160 133 -27 1.202
SCl2 Sulfur dichloride 2 A1 208 146 -62 1.424
SCl2 Sulfur dichloride 3 B2 535 401 -134 1.336
NaK Sodium Potassium 1 Σ 124 101 -23 1.231
PS+ phosphorus monosulfide cation 1 Σ 845 688 -156 1.227
S3- Sulfur trimer anion 3 B2 594 -304 -898 -1.955
S3 Sulfur trimer 1 A1 581 464 -117 1.251
BF Boron monofluoride 1 Σ 1402 1145 -257 1.224
PH- phosphorus monohydride anion 1 Σ 2230 1850 -380 1.205
AlH+ aluminum monohydride cation 1 Σ 1620 1212 -408 1.337
H3O+ hydronium 2 A1 954 498 -456 1.915
MgH+ magnesium monohydride cation 1 Σ 1699 1400 -299 1.213
SCN thiocyanato radical 2 Σ 762 614 -148 1.240
PF+ phosphorus monofluoride cation 1 Σ 1053 834 -219 1.263
SiCl3 trichlorosilyl radical 3 E 582 480 -102 1.212
NCO isocyanato radical 1 Σ 1921 1575 -346 1.220
AlN Aluminum nitride 1 Σ 747 605 -142 1.235
GeH2 germylene 1 A1 1856 872 -984 2.128
ZnCH3 Zinc monomethyl 6 E 315 613 298 0.514
SiH2Cl2 dichlorosilane 3 A1 527 426 -101 1.238
C2Cl2+ dichloroacetylene cation 5 Πu 233 154 -79 1.515
BF3+ boron trifluoride cation 4 E' 411 330 -81 1.244
SOCl2 thionyl chloride 3 A' 344 246 -98 1.398
SOCl2 thionyl chloride 5 A" 455 356 -99 1.278
HN3 hydrogen azide 6 A" 607 461 -146 1.318
BrF5 bromine pentafluoride 4 B1 312 255 -57 1.224
ZnCN Zinc monocyanide 3 Π 212 161 -51 1.313
GeCl2 Germanium dichloride 1 A1 409 325 -84 1.258
NCl nitrogen monochloride 1 Σ 828 612 -216 1.352
S3 Sulfur trimer 2 A1 281 200 -81 1.406
AlCl Aluminum monochloride 1 Σ 482 370 -112 1.303
ZnH2 Zinc hydride 3 Πu 633 474 -159 1.335
ClONO2 Chlorine nitrate 9 A" 124 94 -29 1.313
BrO Bromine monoxide 1 Σ 726 557 -169 1.303
SiCl3 trichlorosilyl radical 1 A1 470 374 -96 1.257
GeH2 germylene 2 A1 916 1727 811 0.530
HOCN cyanic acid 5 A' 460 344 -116 1.338
C4H6O2 2,3-Butanedione 21 Bg 240 114 -126 2.107
C2H3NO3 Oxamic acid 3 A' 2600 3489 889 0.745
C2H3NO3 Oxamic acid 15 A' 328 271 -57 1.211
C2H3NO3 Oxamic acid 17 A" 815 637 -178 1.280
HCNO fulminic acid 3 Σ 1254 1023 -231 1.226
C5H8 1,4-Pentadiene 17 A 102 82 -20 1.242
COBr2 Carbonic dibromide 4 B1 757 478 -279 1.584
HCCCN Cyanoacetylene 7 Π 222 184 -38 1.206
CCl2 dichloromethylene 1 A1 730 585 -145 1.247
SO2F2 Sulfuryl fluoride 2 A1 848 687 -161 1.234
SO2F2 Sulfuryl fluoride 5 A2 388 239 -149 1.625
SO2F2 Sulfuryl fluoride 7 B1 539 326 -213 1.655
SO2F2 Sulfuryl fluoride 8 B2 1502 951 -551 1.579
H2CCCCH2 Butatriene 10 B2g 544 160 -384 3.406
CBr2F2 Methane, dibromodifluoro- 3 A1 140 305 165 0.459
HCNO fulminic acid 5 Π 224 327 103 0.686
C5H8 1,4-Pentadiene 31 B 721 595 -126 1.212
C5H8 1,4-Pentadiene 33 B 331 85 -246 3.901
SiF2 Silicon difluoride 2 A1 278 230 -48 1.207
HCCF Fluoroacetylene 5 Π 367 294 -73 1.250
SiH2Cl2 dichlorosilane 9 B2 590 482 -108 1.225
SeS Selenium monosulfide 1 Σ 556 430 -126 1.293
KH Potassium hydride 1 Σ 984 796 -187 1.235
SOCl2 thionyl chloride 1 A' 1251 943 -308 1.327
SOCl2 thionyl chloride 6 A" 284 201 -83 1.416
SF4 Sulfur tetrafluoride 4 A1 228 104 -124 2.199
ClF+ clorine monofluoride cation 1 Σ 870 631 -239 1.379
SCl2 Sulfur dichloride 1 A1 525 394 -131 1.333
Si2 Silicon diatomic 1 Σg 511 414 -97 1.235
SiH- silicon monohydride anion 1 Σ 2175 1550 -625 1.403
SF2 sulfur difluoride 2 A1 355 262 -93 1.355
SO+ sulfur monoxide cation 1 Σ 1360 1042 -318 1.306
DF Hydrofluoric acid-d 1 Σ 2998 2579 -419 1.162
PO+ phosphorus monoxide cation 1 Σ 1405 1141 -264 1.232