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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
C12H8 biphenylene rCC 1.428 6.242 4.814
C12H8 biphenylene rCC 1.370 2.890 1.520
C12H8 biphenylene rCC 1.372 2.450 1.078
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
Be2 Beryllium diatomic rBeBe 2.460 2.007 -0.453
C4H6O2 2,3-Butanedione rCH 1.114 1.550 0.436
CH3CHClCH3 Propane, 2-chloro- rCH 1.092 1.522 0.430
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
CH3CH2O Ethoxy radical rCC 1.521 1.370 -0.151
CaCl calcium monochloride rClCa 2.437 2.568 0.131
CaH Calcium monohydride rHCa 2.003 2.121 0.119
CaH Calcium monohydride rHCa 2.003 2.121 0.119
AlN Aluminum nitride rNAl 1.786 1.683 -0.103
C12H8 biphenylene rCC 1.524 1.424 -0.100
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
CO Carbon monoxide rCO 1.128 1.215 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
C12H8 biphenylene rCC 1.432 1.509 0.077
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
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.103 0.072
ClNO2 Nitryl chloride rNCl 1.840 1.912 0.072
SOCl2 thionyl chloride rSCl 2.076 2.148 0.072
BC boron monocarbide rBC 1.491 1.421 -0.071
C2 Carbon diatomic rCC 1.243 1.311 0.068
CaF Calcuium monofluoride rFCa 1.967 2.035 0.068
HClO4 perchloric acid rOCl 1.641 1.708 0.067
K2 Potassium dimer rKK 3.905 3.972 0.067
He2+ helium dimer cation rHeHe 1.081 1.147 0.066
B2 Boron diatomic rBB 1.590 1.524 -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
HClO4 perchloric acid rOCl 1.404 1.465 0.061
BrF5 bromine pentafluoride rFBr 1.689 1.750 0.061
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.523 -0.057
SO2F2 Sulfuryl fluoride rFS 1.530 1.586 0.056
Cl2 Chlorine diatomic rClCl 1.988 2.043 0.055
Cl2 Chlorine diatomic rClCl 1.988 2.042 0.055
BN boron nitride rBN 1.325 1.271 -0.054
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
Be2 Beryllium diatomic rBeBe 2.460 2.514 0.054
BHCl2 Borane, dichloro- rBH 1.130 1.183 0.053
BeCl2 Beryllium chloride rBeCl 1.750 1.803 0.053
H2SO4 Sulfuric acid rSO 1.574 1.626 0.052
SCl2 Sulfur dichloride rSCl 2.014 2.065 0.051
SCl2 Sulfur dichloride rSCl 2.014 2.065 0.051
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.349 -0.051
Ne2+ Neon dimer cation rNeNe 1.765 1.816 0.051
B2 Boron diatomic rBB 1.590 1.641 0.051
S2Cl2 Disulfur dichloride rSS 1.931 1.981 0.050
B2 Boron diatomic rBB 1.590 1.640 0.050
GeCl Germanium monochloride rClGe 2.164 2.214 0.050
PCl5 Phosphorus pentachloride rPCl 2.020 2.070 0.050
Li2 Lithium diatomic rLiLi 2.673 2.723 0.050
Li2 Lithium diatomic rLiLi 2.673 2.723 0.050
75 molecules.