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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 HF/6-311+G(3df,2p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Mg2 Magnesium diatomic rMgMg 3.891 6.724 2.834
FO2 Dioxygen monofluoride rFO 1.649 3.279 1.630
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.349 0.919
ONNO NO dimer rNN 2.236 1.511 -0.725
Be2 Beryllium diatomic rBeBe 2.460 1.780 -0.680
Al2 Aluminum diatomic rAlAl 2.701 2.256 -0.445
N2O3 Dinitrogen trioxide rNN 1.864 1.596 -0.268
N2O4 Dinitrogen tetroxide rNN 1.782 1.588 -0.194
FNO Nitrosyl fluoride rNF 1.512 1.384 -0.128
CuCl Copper monochloride rCuCl 2.051 2.177 0.126
FNO3 Fluorine nitrate rNO 1.507 1.382 -0.125
Na2 Sodium diatomic rNaNa 3.079 3.194 0.115
NaLi lithium sodium rLiNa 2.889 3.001 0.112
Li2 Lithium diatomic rLiLi 2.673 2.785 0.112
Si2 Silicon diatomic rSiSi 2.246 2.138 -0.108
CO Carbon monoxide rCO 1.206 1.103 -0.103
CO Carbon monoxide rCO 1.206 1.103 -0.103
HNO2 Nitrous acid rNO 1.442 1.341 -0.101
LiO lithium oxide rLiO 1.688 1.589 -0.099
H2O2 Hydrogen peroxide rOO 1.475 1.382 -0.093
F3NO Nitrogen trifluoride oxide rNF 1.431 1.339 -0.092
KBr Potassium Bromide rKBr 2.821 2.913 0.092
ClNO2 Nitryl chloride rNCl 1.840 1.748 -0.092
NO3 Nitrogen trioxide rNO 1.238 1.329 0.091
SO2Cl2 Sulfuryl chloride rSCl 2.076 1.987 -0.089
CH3CH(CH3)ONO Iso-propyl nitrite rON 1.414 1.326 -0.088
F2 Fluorine diatomic rFF 1.412 1.325 -0.087
O3 Ozone rOO 1.278 1.192 -0.086
CH2O2 Dioxirane rOO 1.516 1.431 -0.085
C2H5NO3 Nitric acid, ethyl ester rNO 1.407 1.323 -0.084
HOF Hypofluorous acid rFO 1.442 1.359 -0.083
F2O Difluorine monoxide rFO 1.412 1.330 -0.082
CuF Copper monofluoride rCuF 1.745 1.826 0.081
PCl5 Phosphorus pentachloride rPCl 2.214 2.134 -0.080
KCl Potassium Chloride rKCl 2.667 2.746 0.079
CH3ONO Methyl nitrite rNO 1.398 1.320 -0.078
BO2 Boron dioxide rBO 1.265 1.188 -0.077
FNO3 Fluorine nitrate rFO 1.409 1.332 -0.077
HNO3 Nitric acid rNO 1.406 1.330 -0.076
CH3NO3 Methyl nitrate rNO 1.402 1.326 -0.076
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.326 -0.074
C2Cl2 dichloroacetylene rCC 1.246 1.174 -0.072
CuO Copper Monoxide rCuO 1.724 1.795 0.071
HPO HPO rPO 1.512 1.444 -0.068
AlO Aluminum monoxide rAlO 1.618 1.686 0.068
NF2 Difluoroamino radical rNF 1.370 1.304 -0.066
KH Potassium hydride rHK 2.243 2.308 0.065
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.516 -0.064
ClNO Nitrosyl chloride rNCl 1.975 1.911 -0.064
ClFO3 Perchloryl fluoride rFCl 1.598 1.534 -0.064
C5H8O 2H-Pyran, 3,4-dihydro- rCO 1.405 1.343 -0.062
N2F2 (Z)-Difluorodiazene rNF 1.384 1.323 -0.061
BrF5 bromine pentafluoride rFBr 1.774 1.714 -0.060
HNO Nitrosyl hydride rNH 1.090 1.031 -0.060
NH2OH hydroxylamine rNO 1.453 1.394 -0.059
C3H8O2 Propylene glycol rOH 1.000 0.941 -0.059
SO2Cl2 Sulfuryl chloride rSO 1.443 1.385 -0.058
CH3CHNOH Acetaldoxime rCC 1.550 1.494 -0.056
C3H8O2 1,3-Propanediol rCH 1.140 1.084 -0.056
C6H5OCH3 Anisole rCO 1.399 1.343 -0.056
C6H6 Fulvene rCH 1.130 1.074 -0.056
C5H12O Butane, 1-methoxy- rCO 1.448 1.392 -0.056
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560 1.505 -0.055
C3H5Cl3 Propane, 1,2,3-trichloro- rCH 1.131 1.077 -0.054
ClF3 Chlorine trifluoride rFCl 1.597 1.543 -0.053
CH3CH2NH2 Ethylamine rNH 1.052 0.999 -0.053
HOBr Hypobromous acid rBrO 1.834 1.781 -0.053
C5H8O Methyl cyclopropyl ketone rCH 1.126 1.073 -0.053
C5H10 2-Pentene, (E)- rCC 1.576 1.524 -0.052
C2H3N3 1H-1,2,4-Triazole rCN 1.377 1.325 -0.052
SeO2 Selenium dioxide rSeO 1.607 1.555 -0.052
Cl2O Dichlorine monoxide rClO 1.696 1.646 -0.050
72 molecules.