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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 B3LYP/6-31G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.365 0.935
Ne2 Neon dimer rNeNe 3.100 2.478 -0.622
Be2 Beryllium diatomic rBeBe 2.460 2.007 -0.453
C4H6O2 2,3-Butanedione rCH 1.114 1.550 0.436
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.534 0.421
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.530 0.417
Al2 Aluminum diatomic rAlAl 2.701 3.065 0.364
C4H8O2 1,3-Dioxane rCH 1.095 1.408 0.313
Cu2 Copper dimer rCuCu 2.220 2.023 -0.196
Al2 Aluminum diatomic rAlAl 2.701 2.514 -0.187
Si2 Silicon diatomic rSiSi 2.246 2.068 -0.178
CaCl calcium monochloride rClCa 2.437 2.568 0.131
ClF+ clorine monofluoride cation rFCl 1.448 1.573 0.124
CaH Calcium monohydride rHCa 2.003 2.121 0.119
AlN Aluminum nitride rNAl 1.786 1.683 -0.103
CaOH Calcium monohydroxide rOCa 1.976 2.068 0.092
CuO Copper Monoxide rCuO 1.724 1.632 -0.092
LiO lithium oxide rLiO 1.688 1.601 -0.087
ClFO3 Perchloryl fluoride rFCl 1.598 1.679 0.081
CuF Copper monofluoride rCuF 1.745 1.666 -0.079
NaK Sodium Potassium rNaK 3.589 3.511 -0.078
FO2 Dioxygen monofluoride rFO 1.649 1.572 -0.077
ClS2 Sulfur chloride rSCl 2.071 2.146 0.075
Si2 Silicon diatomic rSiSi 2.246 2.171 -0.075
ClNO2 Nitryl chloride rNCl 1.840 1.912 0.072
SOCl2 thionyl chloride rSCl 2.076 2.148 0.072
C2 Carbon diatomic rCC 1.243 1.311 0.068
CaF Calcuium monofluoride rFCa 1.967 2.035 0.068
CO Carbon monoxide rCO 1.206 1.138 -0.068
CO Carbon monoxide rCO 1.206 1.138 -0.068
He2+ helium dimer cation rHeHe 1.081 1.147 0.066
B2 Boron diatomic rBB 1.590 1.524 -0.066
KCl Potassium Chloride rKCl 2.667 2.732 0.065
S2Cl2 Disulfur dichloride rSCl 2.057 2.122 0.065
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.845 0.064
CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- rCCl 1.803 1.865 0.062
BrF5 bromine pentafluoride rFBr 1.689 1.750 0.061
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.523 -0.057
Na2+ sodium dimer cation rNaNa 3.540 3.597 0.057
SO2F2 Sulfuryl fluoride rFS 1.530 1.586 0.056
Cl2 Chlorine diatomic rClCl 1.988 2.042 0.055
BN boron nitride rBN 1.325 1.271 -0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.496 -0.054
ClF3 Chlorine trifluoride rFCl 1.597 1.650 0.054
ClFO3 Perchloryl fluoride rClO 1.400 1.454 0.054
OClO Chlorine dioxide rClO 1.470 1.523 0.054
BHCl2 Borane, dichloro- rBH 1.130 1.183 0.053
H2SO4 Sulfuric acid rSO 1.574 1.626 0.052
SCl2 Sulfur dichloride rSCl 2.014 2.065 0.051
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.349 -0.051
S2Cl2 Disulfur dichloride rSS 1.931 1.981 0.050
B2 Boron diatomic rBB 1.590 1.640 0.050
PCl5 Phosphorus pentachloride rPCl 2.020 2.070 0.050
Li2 Lithium diatomic rLiLi 2.673 2.723 0.050
54 molecules.