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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 B3PW91/6-31G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C5H10S 2H-Thiopyran, tetrahydro- rCC 1.528 2.753 1.225
HBO Boron hydride oxide rBO 1.200 2.380 1.180
C5H10S 2H-Thiopyran, tetrahydro- rCS 1.811 2.797 0.986
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.357 0.927
Be2 Beryllium diatomic rBeBe 2.460 2.015 -0.445
C4H6O2 2,3-Butanedione rCH 1.114 1.547 0.433
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.529 0.416
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.526 0.413
Al2 Aluminum diatomic rAlAl 2.701 3.038 0.337
C4H8O2 1,3-Dioxane rCH 1.095 1.401 0.306
Mg2 Magnesium diatomic rMgMg 3.891 3.604 -0.287
Ne2 Neon dimer rNeNe 3.100 2.841 -0.259
Al2 Aluminum diatomic rAlAl 2.701 2.489 -0.212
Cu2 Copper dimer rCuCu 2.220 2.020 -0.199
Si2 Silicon diatomic rSiSi 2.246 2.057 -0.189
He2+ helium dimer cation rHeHe 1.081 1.220 0.139
CaCl calcium monochloride rClCa 2.437 2.559 0.122
CaH Calcium monohydride rHCa 2.003 2.118 0.115
ClF+ clorine monofluoride cation rFCl 1.448 1.563 0.114
AlN Aluminum nitride rNAl 1.786 1.679 -0.107
CuO Copper Monoxide rCuO 1.724 1.630 -0.094
FO2 Dioxygen monofluoride rFO 1.649 1.559 -0.090
CaOH Calcium monohydroxide rOCa 1.976 2.065 0.089
Li2 Lithium diatomic rLiLi 2.673 2.761 0.088
Si2 Silicon diatomic rSiSi 2.246 2.161 -0.085
Na2+ sodium dimer cation rNaNa 3.540 3.624 0.084
LiO lithium oxide rLiO 1.688 1.608 -0.080
CuF Copper monofluoride rCuF 1.745 1.666 -0.079
CO Carbon monoxide rCO 1.206 1.137 -0.069
CO Carbon monoxide rCO 1.206 1.137 -0.069
C2 Carbon diatomic rCC 1.243 1.311 0.068
ClFO3 Perchloryl fluoride rFCl 1.598 1.665 0.067
CaF Calcuium monofluoride rFCa 1.967 2.032 0.065
B2 Boron diatomic rBB 1.590 1.526 -0.064
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.520 -0.060
CH3CHNOH Acetaldoxime rCC 1.550 1.492 -0.058
BHCl2 Borane, dichloro- rBH 1.130 1.188 0.058
KCl Potassium Chloride rKCl 2.667 2.724 0.057
PCl5 Phosphorus pentachloride rPCl 2.214 2.158 -0.056
BN boron nitride rBN 1.325 1.271 -0.054
H2+ Hydrogen cation rHH 1.052 1.106 0.054
B2 Boron diatomic rBB 1.590 1.643 0.053
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.348 -0.052
BrF5 bromine pentafluoride rFBr 1.689 1.740 0.051
C5H10 2-Pentene, (E)- rCC 1.576 1.525 -0.051
45 molecules.