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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/6-311G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Be2 Beryllium diatomic rBeBe 2.460 2.003 -0.457
Ne2 Neon dimer rNeNe 3.100 2.650 -0.450
C4H6O2 2,3-Butanedione rCH 1.114 1.555 0.441
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 3.085 0.384
C4H8O2 1,3-Dioxane rCH 1.095 1.407 0.312
Si2 Silicon diatomic rSiSi 2.246 2.063 -0.183
ClF+ clorine monofluoride cation rFCl 1.448 1.578 0.130
ZnS Zinc sulfide rSZn 2.046 2.174 0.127
AlN Aluminum nitride rNAl 1.786 1.681 -0.106
SOCl2 thionyl chloride rSCl 2.076 2.169 0.093
NaK Sodium Potassium rNaK 3.589 3.502 -0.087
BrF5 bromine pentafluoride rFBr 1.689 1.767 0.078
B2 Boron diatomic rBB 1.590 1.518 -0.072
He2+ helium dimer cation rHeHe 1.081 1.150 0.070
Na2+ sodium dimer cation rNaNa 3.540 3.607 0.067
SCl2 Sulfur dichloride rSCl 2.014 2.078 0.064
BrF3 Bromine trifluoride rFBr 1.721 1.784 0.063
C2 Carbon diatomic rCC 1.243 1.306 0.063
BN boron nitride rBN 1.325 1.264 -0.061
SO2F2 Sulfuryl fluoride rFS 1.530 1.591 0.061
BrCl Bromine monochloride rClBr 2.136 2.196 0.060
H2+ Hydrogen cation rHH 1.052 1.108 0.056
Cl2+ chlorine diatomic cation rClCl 1.892 1.947 0.056
25 molecules.