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IV.D.7. (XVIII.A.2.)

Bad Calculated Bond Lengths

List of molecules with calculated bond lengths that differ by more than 0.050 Å from experimental bond lengths.

Calculated at mPW1PW91/6-31G(2df,p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C5H8 1,4-Pentadiene rCH 1.110 5.566 4.456
C5H8 1,4-Pentadiene rCC 1.511 4.733 3.222
C5H8 1,4-Pentadiene rCC 1.339 3.541 2.202
Ne2 Neon dimer rNeNe 3.100 2.528 -0.572
C4H6O2 2,3-Butanedione rCH 1.114 1.543 0.429
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.526 0.413
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.522 0.409
Al2 Aluminum diatomic rAlAl 2.701 3.021 0.320
Mg2 Magnesium diatomic rMgMg 3.891 3.577 -0.313
C4H8O2 1,3-Dioxane rCH 1.095 1.394 0.299
Al2 Aluminum diatomic rAlAl 2.701 2.477 -0.224
Si2 Silicon diatomic rSiSi 2.246 2.051 -0.195
AlN Aluminum nitride rNAl 1.786 1.666 -0.121
FO2 Dioxygen monofluoride rFO 1.649 1.532 -0.117
CuO Copper Monoxide rCuO 1.724 1.633 -0.091
CuCl Copper monochloride rCuCl 2.051 1.961 -0.091
CuF Copper monofluoride rCuF 1.745 1.659 -0.086
ClF+ clorine monofluoride cation rFCl 1.448 1.534 0.086
PCl5 Phosphorus pentachloride rPCl 2.214 2.131 -0.083
Li2 Lithium diatomic rLiLi 2.673 2.752 0.079
CaH Calcium monohydride rHCa 2.003 2.081 0.079
CO Carbon monoxide rCO 1.206 1.128 -0.078
CO Carbon monoxide rCO 1.206 1.128 -0.078
Na2+ sodium dimer cation rNaNa 3.540 3.617 0.077
N2O3 Dinitrogen trioxide rNN 1.864 1.794 -0.070
CaCl calcium monochloride rClCa 2.437 2.507 0.070
B2 Boron diatomic rBB 1.590 1.521 -0.069
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.515 -0.065
C2 Carbon diatomic rCC 1.243 1.307 0.064
CH3CHNOH Acetaldoxime rCC 1.550 1.488 -0.062
FNO Nitrosyl fluoride rNF 1.512 1.451 -0.061
BN boron nitride rBN 1.325 1.265 -0.060
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.342 -0.058
BHCl2 Borane, dichloro- rBH 1.130 1.185 0.055
C5H10 2-Pentene, (E)- rCC 1.576 1.522 -0.054
C5H8O 2H-Pyran, 3,4-dihydro- rCO 1.405 1.352 -0.053
B2 Boron diatomic rBB 1.590 1.642 0.052
N2O4 Dinitrogen tetroxide rNN 1.782 1.730 -0.052
He2+ helium dimer cation rHeHe 1.081 1.131 0.050
H2O2 Hydrogen peroxide rOO 1.475 1.425 -0.050
40 molecules.