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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 mPW1PW91/6-311G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.348 0.918
Be2 Beryllium diatomic rBeBe 2.460 2.011 -0.449
C4H6O2 2,3-Butanedione rCH 1.114 1.546 0.432
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.524 0.411
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.521 0.408
Al2 Aluminum diatomic rAlAl 2.701 3.051 0.350
Ne2 Neon dimer rNeNe 3.100 2.764 -0.336
C4H8O2 1,3-Dioxane rCH 1.095 1.396 0.301
Mg2 Magnesium diatomic rMgMg 3.891 3.597 -0.294
Al2 Aluminum diatomic rAlAl 2.701 2.479 -0.222
FO2 Dioxygen monofluoride rFO 1.649 1.861 0.212
Si2 Silicon diatomic rSiSi 2.246 2.049 -0.197
AlN Aluminum nitride rNAl 1.786 1.675 -0.112
ClF+ clorine monofluoride cation rFCl 1.448 1.559 0.111
LiO lithium oxide rLiO 1.688 1.587 -0.101
Na2+ sodium dimer cation rNaNa 3.540 3.641 0.101
He2+ helium dimer cation rHeHe 1.081 1.180 0.099
ZnS Zinc sulfide rSZn 2.046 2.145 0.098
Si2 Silicon diatomic rSiSi 2.246 2.152 -0.094
CO Carbon monoxide rCO 1.206 1.125 -0.081
CO Carbon monoxide rCO 1.206 1.125 -0.081
ClFO3 Perchloryl fluoride rFCl 1.598 1.678 0.080
B2 Boron diatomic rBB 1.590 1.518 -0.072
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.512 -0.068
BN boron nitride rBN 1.325 1.262 -0.063
Li2 Lithium diatomic rLiLi 2.673 2.736 0.063
CH3CHNOH Acetaldoxime rCC 1.550 1.487 -0.063
C2 Carbon diatomic rCC 1.243 1.304 0.062
H2+ Hydrogen cation rHH 1.052 1.114 0.062
BrF5 bromine pentafluoride rFBr 1.689 1.747 0.058
C5H10 2-Pentene, (E)- rCC 1.576 1.520 -0.056
BHCl2 Borane, dichloro- rBH 1.130 1.185 0.055
ClNO2 Nitryl chloride rNCl 1.840 1.894 0.054
B2 Boron diatomic rBB 1.590 1.642 0.052
ClS2 Sulfur chloride rSCl 2.071 2.123 0.052
PCl5 Phosphorus pentachloride rPCl 2.214 2.163 -0.051
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.349 -0.051
C5H8O 2H-Pyran, 3,4-dihydro- rCO 1.405 1.354 -0.051
SOCl2 thionyl chloride rSCl 2.076 2.126 0.050
HCF Fluoromethylene rCH 1.138 1.088 -0.050
40 molecules.