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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 LSDA/6-31G(2df,p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.330 0.900
Ne2 Neon dimer rNeNe 3.100 2.312 -0.788
Mg2 Magnesium diatomic rMgMg 3.891 3.355 -0.535
C4H6O2 2,3-Butanedione rCH 1.114 1.531 0.417
C4H6O2 2,3-Butanedione rCH 1.114 1.529 0.415
C4H6O2 2,3-Butanedione rCH 1.114 1.529 0.415
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.511 0.398
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.508 0.395
ONNO NO dimer rNN 2.236 1.852 -0.385
Al2 Aluminum diatomic rAlAl 2.701 3.029 0.328
C4H8O2 1,3-Dioxane rCH 1.095 1.387 0.292
Al2 Aluminum diatomic rAlAl 2.701 2.453 -0.248
B2 Boron diatomic rBB 1.590 1.373 -0.217
NaK Sodium Potassium rNaK 3.589 3.386 -0.203
Si2 Silicon diatomic rSiSi 2.246 2.044 -0.202
Na2 Sodium diatomic rNaNa 3.079 2.899 -0.180
CuCl Copper monochloride rCuCl 2.051 1.902 -0.149
AlN Aluminum nitride rNAl 1.786 1.654 -0.133
CuO Copper Monoxide rCuO 1.724 1.593 -0.132
CuF Copper monofluoride rCuF 1.745 1.619 -0.126
Na2Cl2 Disodium dichloride rNaCl 2.584 2.478 -0.106
PCl5 Phosphorus pentachloride rPCl 2.214 2.111 -0.103
ClF+ clorine monofluoride cation rFCl 1.448 1.541 0.093
ZnS Zinc sulfide rSZn 2.046 1.955 -0.091
KF Potassium Fluoride rKF 2.171 2.085 -0.086
CH3O Methoxy radical rCO 1.405 1.320 -0.085
H2+ Hydrogen cation rHH 1.052 1.133 0.081
He2+ helium dimer cation rHeHe 1.081 1.161 0.080
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.501 -0.079
CH3CHNOH Acetaldoxime rCC 1.550 1.473 -0.077
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.856 -0.074
CH3CH2O Ethoxy radical rCO 1.388 1.316 -0.072
CO Carbon monoxide rCO 1.206 1.134 -0.072
CO Carbon monoxide rCO 1.206 1.134 -0.072
CuH Copper monohydride rHCu 1.463 1.394 -0.069
C2 Carbon diatomic rCC 1.243 1.311 0.068
C5H10 2-Pentene, (E)- rCC 1.576 1.508 -0.068
BHCl2 Borane, dichloro- rBH 1.130 1.196 0.066
LiCl- lithium chloride anion rLiCl 2.180 2.116 -0.064
B2 Boron diatomic rBB 1.590 1.526 -0.064
KBr Potassium Bromide rKBr 2.821 2.759 -0.061
HCO Formyl radical rCH 1.080 1.141 0.061
C5H8O 2H-Pyran, 3,4-dihydro- rCO 1.405 1.345 -0.060
C6H5NH2 aniline rCN 1.431 1.373 -0.058
C5H12O Butane, 1-methoxy- rCO 1.448 1.390 -0.058
NaF sodium fluoride rNaF 1.926 1.869 -0.057
HPO HPO rPH 1.433 1.490 0.057
C5H6 1,3-Cyclopentadiene rCC 1.540 1.484 -0.056
BN boron nitride rBN 1.325 1.269 -0.056
NaLi lithium sodium rLiNa 2.889 2.834 -0.055
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560 1.506 -0.054
C6H5OCH3 Anisole rCO 1.399 1.345 -0.054
CH3CCl3 Ethane, 1,1,1-trichloro- rCC 1.550 1.496 -0.054
NaBr Sodium Bromide rNaBr 2.502 2.449 -0.054
C4H5N Cyclopropanecarbonitrile rCC 1.472 1.419 -0.053
C3H5 Allyl radical rCC 1.428 1.375 -0.053
H2O2 Hydrogen peroxide rOO 1.475 1.424 -0.051
HN3 hydrogen azide rNH 0.975 1.026 0.051
FNO Nitrosyl fluoride rNF 1.512 1.461 -0.051
59 molecules.