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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**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.351 0.921
Ne2 Neon dimer rNeNe 3.100 2.578 -0.522
Be2 Beryllium diatomic rBeBe 2.460 2.014 -0.446
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 1.523 0.410
Al2 Aluminum diatomic rAlAl 2.701 3.027 0.326
C4H8O2 1,3-Dioxane rCH 1.095 1.398 0.303
Mg2 Magnesium diatomic rMgMg 3.891 3.592 -0.299
Al2 Aluminum diatomic rAlAl 2.701 2.484 -0.217
Si2 Silicon diatomic rSiSi 2.246 2.052 -0.194
CaCl calcium monochloride rClCa 2.437 2.555 0.118
CaH Calcium monohydride rHCa 2.003 2.113 0.110
AlN Aluminum nitride rNAl 1.786 1.677 -0.109
ClF+ clorine monofluoride cation rFCl 1.448 1.556 0.107
CuO Copper Monoxide rCuO 1.724 1.633 -0.091
CaOH Calcium monohydroxide rOCa 1.976 2.061 0.085
Li2 Lithium diatomic rLiLi 2.673 2.758 0.085
LiO lithium oxide rLiO 1.688 1.605 -0.084
Na2+ sodium dimer cation rNaNa 3.540 3.621 0.081
CuF Copper monofluoride rCuF 1.745 1.666 -0.079
CO Carbon monoxide rCO 1.206 1.135 -0.071
CO Carbon monoxide rCO 1.206 1.135 -0.071
N2O3 Dinitrogen trioxide rNN 1.864 1.796 -0.068
B2 Boron diatomic rBB 1.590 1.523 -0.067
C2 Carbon diatomic rCC 1.243 1.308 0.066
PCl5 Phosphorus pentachloride rPCl 2.214 2.150 -0.064
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.517 -0.063
CaF Calcuium monofluoride rFCa 1.967 2.029 0.062
CH3CHNOH Acetaldoxime rCC 1.550 1.489 -0.061
BN boron nitride rBN 1.325 1.268 -0.057
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.343 -0.057
BHCl2 Borane, dichloro- rBH 1.130 1.185 0.055
ClFO3 Perchloryl fluoride rFCl 1.598 1.653 0.055
C5H10 2-Pentene, (E)- rCC 1.576 1.522 -0.054
FNO Nitrosyl fluoride rNF 1.512 1.459 -0.053
B2 Boron diatomic rBB 1.590 1.642 0.052
KCl Potassium Chloride rKCl 2.667 2.719 0.052
He2+ helium dimer cation rHeHe 1.081 1.131 0.050
39 molecules.