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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 CCD/6-31G
Calculated values were scaled by 0.9595.

Species Name mode Symmetry Experiment Theory difference ratio
HCN+ hydrogen cyanide cation 2 Σ 1800 2748 948 0.655
CHONH2 formamide 12 A" 289 436 148 0.662
CH3COOCH3 methyl acetate 27 A" 110 88 -22 1.248
C6H4O2 parabenzoquinone 16 B2g 794 626 -168 1.268
C6H4O2 parabenzoquinone 30 B3u 109 85 -23 1.271
C6H5Cl chlorobenzene 18 B1 685 561 -124 1.221
C3H2N2 Malononitrile 6 A1 167 130 -37 1.285
C4H8O Furan, tetrahydro- 17 A 286 236 -50 1.210
C4H8O Furan, tetrahydro- 33 B 137 52 -85 2.653
C4H9N Pyrrolidine 36 A" 65 12 -53 5.408
C5H8 Cyclopentene 18 A' 254 102 -152 2.491
C2H4O3 trioxolane124 21 B 193 154 -39 1.253
C6H5F Fluorobenzene 18 B1 685 515 -170 1.331
C2H3NO3 Oxamic acid 16 A" 984 735 -249 1.339
C2H3NO3 Oxamic acid 18 A" 745 571 -174 1.304
C2H3NO3 Oxamic acid 21 A" 162 60 -102 2.696
C6H4F2 1,4-difluorobenzene 16 B2g 692 499 -193 1.388
C5H8 1,4-Pentadiene 16 A 137 285 148 0.480
COBr2 Carbonic dibromide 6 B2 512 324 -188 1.581
CH3SSCH3 Disulfide, dimethyl 11 A 240 190 -50 1.261
CH3SSCH3 Disulfide, dimethyl 23 B 274 218 -56 1.257
C4H6O Cyclobutanone 13 A2 909 702 -207 1.295
GeO2 Germanium dioxide 3 Πu 196 102 -93 1.915
ZnS Zinc sulfide 1 Σ 459 380 -79 1.207
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 217 73 0.663
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 333 -123 1.371
C5H8 1,3-Pentadiene, (Z)- 32 A" 171 94 -77 1.824
CCl2 dichloromethylene 2 A1 335 274 -62 1.225
CCl2 dichloromethylene 3 B2 758 571 -187 1.328
SF6 Sulfur Hexafluoride 1 A1g 774 597 -176 1.295
SF6 Sulfur Hexafluoride 6 T2u 347 223 -124 1.558
SO2F2 Sulfuryl fluoride 1 A1 1269 902 -367 1.407
SO2F2 Sulfuryl fluoride 3 A1 544 363 -181 1.497
SO2F2 Sulfuryl fluoride 4 A1 385 245 -140 1.573
SO2F2 Sulfuryl fluoride 6 B1 885 732 -153 1.209
SO2F2 Sulfuryl fluoride 9 B2 553 356 -197 1.552
OH- hydroxide anion 1 Σ 3738 3032 -707 1.233
CCl+ carbon monochloride cation 1 Σ 1175 975 -200 1.205
SiH2Cl2 dichlorosilane 4 A1 188 153 -35 1.229
SeS- selenium monosulfide anion 1 Σ 469 358 -111 1.311
KCl Potassium Chloride 1 Σ 281 233 -48 1.204
C2Cl2+ dichloroacetylene cation 4 Πg 318 216 -102 1.472
SOCl2 thionyl chloride 2 A' 492 333 -159 1.476
SOCl2 thionyl chloride 4 A' 194 115 -79 1.688
SF4 Sulfur tetrafluoride 1 A1 892 708 -183 1.259
SF4 Sulfur tetrafluoride 3 A1 532 404 -128 1.318
BrF5 bromine pentafluoride 6 B2 281 198 -83 1.422
BrF5 bromine pentafluoride 9 E 237 178 -59 1.333
S2Cl2 Disulfur dichloride 2 A 466 368 -98 1.267
S2Cl2 Disulfur dichloride 4 A 95 64 -31 1.473
S2Cl2 Disulfur dichloride 6 B 244 171 -73 1.425
NCl3 nitrogen trichloride 4 E 257 210 -47 1.223
SCl2 Sulfur dichloride 2 A1 208 143 -65 1.450
SCl2 Sulfur dichloride 3 B2 535 395 -140 1.354
NS+ nitrogen sulfide cation 1 Σ 1415 1175 -240 1.204
CaOH Calcium monohydroxide 2 Σ 353 592 239 0.596
CaOH Calcium monohydroxide 3 Π 609 504 -105 1.207
PS+ phosphorus monosulfide cation 1 Σ 845 696 -148 1.213
S3- Sulfur trimer anion 3 B2 594 -810 -1405 -0.733
S3 Sulfur trimer 1 A1 581 475 -106 1.224
BrF+ bromine fluoride cation 1 Σ 750 1414 664 0.530
AlH+ aluminum monohydride cation 1 Σ 1620 1332 -288 1.216
H3O+ hydronium 2 A1 954 498 -456 1.917
CaCl calcium monochloride 1 Σ 368 292 -76 1.261
SCN thiocyanato radical 2 Σ 762 610 -152 1.250
PF+ phosphorus monofluoride cation 1 Σ 1053 864 -190 1.219
NCO isocyanato radical 1 Σ 1921 1525 -396 1.260
ZnCH3 Zinc monomethyl 6 E 315 619 304 0.509
SO2F2 Sulfuryl fluoride 2 A1 848 675 -173 1.256
SO2F2 Sulfuryl fluoride 5 A2 388 235 -153 1.648
SO2F2 Sulfuryl fluoride 7 B1 539 325 -214 1.659
SO2F2 Sulfuryl fluoride 8 B2 1502 1012 -490 1.484
SiH2Cl2 dichlorosilane 3 A1 527 430 -97 1.226
C2Cl2+ dichloroacetylene cation 5 Πu 233 148 -85 1.575
BF3+ boron trifluoride cation 4 E' 411 342 -69 1.200
SOCl2 thionyl chloride 3 A' 344 233 -111 1.475
SOCl2 thionyl chloride 5 A" 455 329 -126 1.383
HN3 hydrogen azide 6 A" 607 444 -163 1.366
BrF5 bromine pentafluoride 1 A1 683 528 -155 1.293
BrF5 bromine pentafluoride 4 B1 312 239 -73 1.304
BrF5 bromine pentafluoride 8 E 415 333 -82 1.247
ZnCN Zinc monocyanide 3 Π 212 151 -61 1.403
S2Cl2 Disulfur dichloride 3 A 202 141 -61 1.434
GeCl2 Germanium dichloride 1 A1 409 331 -78 1.237
PO2 Phosphorus dioxide 1 A1 1076 884 -192 1.217
Se2 Selenium diatomic 1 Σg 385 302 -84 1.278
S3 Sulfur trimer 2 A1 281 206 -75 1.365
AlCl Aluminum monochloride 1 Σ 482 378 -104 1.276
ZnH2 Zinc hydride 3 Πu 633 476 -156 1.329
ClONO2 Chlorine nitrate 7 A' 273 221 -52 1.237
ClONO2 Chlorine nitrate 9 A" 124 87 -37 1.424
SCN thiocyanato radical 1 Σ 1942 2528 585 0.768
SiCl3 trichlorosilyl radical 1 A1 470 377 -93 1.245
CH3NH2 methyl amine 14 A" 1195 947 -248 1.262
HCN+ hydrogen cyanide cation 1 Σ 3050 3503 453 0.871
HNCO Isocyanic acid 6 A" 656 512 -144 1.281
C6H4O2 parabenzoquinone 17 B2g 241 201 -40 1.201
C3H2N2 Malononitrile 8 A2 367 303 -64 1.211
HOCN cyanic acid 5 A' 460 323 -137 1.424
C4H6O2 2,3-Butanedione 21 Bg 240 120 -120 2.001
C2H3NO3 Oxamic acid 3 A' 2600 3475 875 0.748
C2H3NO3 Oxamic acid 15 A' 328 269 -59 1.218
C2H3NO3 Oxamic acid 17 A" 815 614 -201 1.328
C5H8 1,4-Pentadiene 17 A 102 80 -22 1.275
COBr2 Carbonic dibromide 4 B1 757 473 -284 1.600
CH3SSCH3 Disulfide, dimethyl 10 A 509 388 -121 1.311
FCN Cyanogen fluoride 3 Π 451 320 -131 1.408
CCl2 dichloromethylene 1 A1 730 589 -141 1.239
HNCO Isocyanic acid 4 A' 777 577 -200 1.347
CBr2F2 Methane, dibromodifluoro- 3 A1 140 301 161 0.466
C6H5CN phenyl cyanide 19 B1 688 557 -131 1.236
C3H2N2 Malononitrile 15 B2 366 301 -65 1.214
C8H8 cubane 8 Eu 617 464 -153 1.331
HCNO fulminic acid 4 Π 537 446 -92 1.206
C5H8 1,4-Pentadiene 31 B 721 577 -144 1.249
C5H8 1,4-Pentadiene 33 B 331 80 -251 4.157
CH3SSCH3 Disulfide, dimethyl 13 A 117 72 -45 1.634
C6H8 1,4-Cyclohexadiene 19 B1u 108 72 -36 1.498
C4H6O Cyclobutanone 12 A2 1163 949 -214 1.225
SF6 Sulfur Hexafluoride 4 T1u 616 402 -213 1.531
SF6 Sulfur Hexafluoride 5 T2g 525 337 -188 1.558
HCCF Fluoroacetylene 5 Π 367 239 -128 1.534
SiH2Cl2 dichlorosilane 9 B2 590 488 -102 1.208
SeS Selenium monosulfide 1 Σ 556 431 -125 1.289
SOCl2 thionyl chloride 1 A' 1251 1037 -214 1.207
SOCl2 thionyl chloride 6 A" 284 191 -93 1.489
SF4 Sulfur tetrafluoride 4 A1 228 86 -142 2.638
BrF5 bromine pentafluoride 2 A1 587 459 -128 1.278
ClF+ clorine monofluoride cation 1 Σ 870 1564 694 0.556
S2Cl2 Disulfur dichloride 1 A 546 376 -170 1.453
S2Cl2 Disulfur dichloride 5 B 461 377 -84 1.223
N2O3 Dinitrogen trioxide 9 A" 63 138 75 0.455
SCl2 Sulfur dichloride 1 A1 525 383 -142 1.371
Si2 Silicon diatomic 1 Σg 511 414 -97 1.234
SiH- silicon monohydride anion 1 Σ 2175 1609 -566 1.352
SF2 sulfur difluoride 2 A1 355 261 -94 1.363
SO+ sulfur monoxide cation 1 Σ 1360 1047 -313 1.299
BrOBr Bromine oxide 1 A1 533 439 -94 1.215