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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 CCSD(T)=FULL/6-31G*
Calculated values were scaled by 0.9707.

Species Name mode Symmetry Experiment Theory difference ratio
C2H2 Acetylene 4 Πg 612 348 -264 1.760
CBr2F2 Methane, dibromodifluoro- 3 A1 140 327 187 0.429
CH2NN diazomethane 6 B1 406 333 -73 1.221
COBr2 Carbonic dibromide 4 B1 757 501 -256 1.512
COBr2 Carbonic dibromide 6 B2 512 333 -179 1.536
GeO2 Germanium dioxide 3 Πu 196 120 -75 1.629
OH- hydroxide anion 1 Σ 3738 3296 -443 1.134
C2Cl2+ dichloroacetylene cation 5 Πu 233 170 -63 1.369
AsH3+ Arsine cation 2 A1 452 655 203 0.690
N2O Nitrous oxide 1 Σ 2224 2666 442 0.834
N2O Nitrous oxide 3 Π 589 402 -187 1.463
NCl3 nitrogen trichloride 4 E 257 621 364 0.414
SiH- silicon monohydride anion 1 Σ 2175 1759 -416 1.236
PO Phosphorus monoxide 1 Σ 1233 1021 -213 1.208
GeH2 germylene 1 A1 1856 898 -958 2.066
GeH2 germylene 2 A1 916 1742 826 0.526
H3+ hydrogen trimer cation 2 E' 2521 2068 -454 1.219