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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 BLYP/cc-pVTZ
Calculated values were scaled by 0.997.

Species Name mode Symmetry Experiment Theory difference ratio
C4H6O Cyclobutanone 13 A2 909 605 -304 1.503
C5H8 1,3-Pentadiene, (Z)- 22 A' 144 209 65 0.690
C5H8 1,3-Pentadiene, (Z)- 31 A" 456 350 -106 1.302
C4H6 Methylenecyclopropane 17 B1 360 276 -84 1.304
SOCl2 thionyl chloride 4 A' 194 154 -40 1.260
BrF5 bromine pentafluoride 6 B2 281 186 -95 1.514
Cl2O Dichlorine monoxide 3 B2 686 530 -156 1.294
PCl5 Phosphorus pentachloride 7 E' 100 78 -22 1.287
BrOBr Bromine oxide 3 B2 629 506 -123 1.244
GeH2 germylene 1 A1 1856 905 -951 2.051
C6H12 2-Butene, 2,3-dimethyl- 37 B2u 181 335 154 0.540
COBr2 Carbonic dibromide 6 B2 512 313 -199 1.635
CH3SCH2CH3 Ethane, (methylthio)- 18 A' 227 187 -40 1.214
CH3ONO Methyl nitrite 9 A' 627 479 -148 1.309
CH3ONO Methyl nitrite 15 A" 186 126 -60 1.472
C4H8O Furan, tetrahydro- 17 A 286 237 -49 1.206
C4H8O Furan, tetrahydro- 33 B 137 37 -100 3.659
C4H8O2 1,4-Dioxane 19 Au 288 236 -52 1.220
C2H3NO3 Oxamic acid 16 A" 984 792 -192 1.242
C2H3NO3 Oxamic acid 18 A" 745 615 -130 1.211
C3H6O Oxetane 23 B2 1228 953 -275 1.288
CH3COCH3 Acetone 12 A2 77 12 -65 6.541
CHONH2 formamide 12 A" 289 180 -109 1.608
CH3CHClCH3 Propane, 2-chloro- 27 A" 276 227 -49 1.218
CH3COCl Acetyl Chloride 15 A" 166 124 -42 1.339
CH3OCHO methyl formate 18 A" 130 103 -27 1.268
C4H6O Cyclobutanone 20 B1 63 26 -37 2.394
C6H8 1,3,5-Hexatriene, (Z)- 11 A1 1136 870 -266 1.305
C6H8 1,3,5-Hexatriene, (Z)- 19 A2 264 153 -111 1.720
C5H8 Cyclopentene 18 A' 254 122 -132 2.089
C2H3NO3 Oxamic acid 21 A" 162 61 -101 2.642
C3H6O Oxetane 18 B1 90 66 -24 1.362
AsH3+ Arsine cation 2 A1 452 687 235 0.658
BrF5 bromine pentafluoride 3 A1 369 296 -73 1.248
S2Cl2 Disulfur dichloride 2 A 466 388 -78 1.202
N2O4 Dinitrogen tetroxide 9 B2u 265 180 -85 1.470
S3- Sulfur trimer anion 3 B2 594 493 -101 1.204
CH3COOH Acetic acid 18 A" 93 68 -25 1.368
CH3COOCH3 methyl acetate 27 A" 110 10 -100 11.200
C3H6O 2-Propen-1-ol 21 A 554 434 -120 1.277
C3H6O 2-Propen-1-ol 23 A 277 222 -55 1.250
C6H12 2-Butene, 2,3-dimethyl- 12 Au 182 151 -31 1.208
C5H8 1,4-Pentadiene 16 A 137 295 158 0.464
C6H10 1,5-Hexadiene 14 Ag 351 257 -94 1.364
C3H8O2S (Methylsulphonyl)ethane 33 ?a 257 205 -52 1.251
C3H6O2 1,3-Dioxolane 6 A 1361 2833 1472 0.480
C3H6O2 1,3-Dioxolane 13 A 658 1221 563 0.539
C4H6O2 2,3-Butanedione 9 Ag 614 493 -121 1.245
C4H6O2 2,3-Butanedione 21 Bg 240 108 -132 2.225
C2H3NO3 Oxamic acid 3 A' 2600 3470 870 0.749
C2H3NO3 Oxamic acid 15 A' 328 259 -69 1.267
C2H3NO3 Oxamic acid 17 A" 815 655 -160 1.244
C3H6O Oxetane 12 A2 986 820 -166 1.202
BrF5 bromine pentafluoride 8 E 415 344 -71 1.207
ClF3 Chlorine trifluoride 6 B2 442 348 -94 1.272
PCl5 Phosphorus pentachloride 2 A1' 370 248 -122 1.492
ClONO2 Chlorine nitrate 7 A' 273 210 -63 1.303
GeH2 germylene 2 A1 916 1791 875 0.511
ClS2 Sulfur chloride 2 A' 450 372 -78 1.211
C6H8 1,3,5-Hexatriene, (Z)- 24 B1 358 103 -255 3.475
C2Cl2+ dichloroacetylene cation 5 Πu 233 180 -53 1.296
BF3+ boron trifluoride cation 4 E' 411 268 -143 1.532
C6H10 1,5-Hexadiene 29 Bg 264 185 -79 1.428
COBr2 Carbonic dibromide 4 B1 757 488 -269 1.550
C3H6O2 1,3-Dioxolane 4 A 1509 2940 1431 0.513
C2F2 difluoroacetylene 4 Πg 270 188 -82 1.434
C3H7N Cyclopropylamine 12 A' 989 815 -174 1.214
CH3OH Methyl alcohol 12 A" 200 296 96 0.676
CH3NH2 methyl amine 14 A" 1195 951 -244 1.256
C3H6O 2-Propen-1-ol 24 A 188 111 -77 1.690
BF3+ boron trifluoride cation 3 E' 1662 1111 -551 1.496
ClF3 Chlorine trifluoride 3 A1 328 242 -86 1.357
S2Cl2 Disulfur dichloride 5 B 461 373 -88 1.235
NCl3 nitrogen trichloride 3 E 642 494 -148 1.298
N2O3 Dinitrogen trioxide 9 A" 63 131 68 0.481
SiH- silicon monohydride anion 1 Σ 2175 1716 -459 1.267
C4H6O Cyclobutanone 12 A2 1163 913 -250 1.274
C3H3 Propargyl radical 7 B1 490 404 -86 1.213
C5H8 1,4-Pentadiene 31 B 721 597 -124 1.207
C5H8 1,4-Pentadiene 33 B 331 104 -227 3.194
C3H8O2S (Methylsulphonyl)ethane 32 ?a 324 263 -61 1.232
C3H6O2 1,3-Dioxolane 5 A 1480 2904 1424 0.510
CH3CONH2 Acetamide 20 A 259 121 -138 2.138
CBr2F2 Methane, dibromodifluoro- 3 A1 140 302 162 0.464