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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 CISD/3-21G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.374 0.944
Cu2 Copper dimer rCuCu 2.220 2.726 0.507
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.549 0.436
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.545 0.432
C4H6O2 2,3-Butanedione rCH 1.114 1.533 0.419
C4H8O2 1,3-Dioxane rCH 1.095 1.438 0.343
Al2 Aluminum diatomic rAlAl 2.701 2.951 0.250
KCl Potassium Chloride rKCl 2.667 2.884 0.217
Si2 Silicon diatomic rSiSi 2.246 2.047 -0.199
Na2+ sodium dimer cation rNaNa 3.540 3.709 0.169
KH Potassium hydride rHK 2.243 2.396 0.154
ClF+ clorine monofluoride cation rFCl 1.448 1.591 0.142
CuF Copper monofluoride rCuF 1.745 1.625 -0.119
NCl nitrogen monochloride rNCl 1.611 1.728 0.117
Ne2 Neon dimer rNeNe 3.100 2.987 -0.113
HO2 Hydroperoxy radical rOO 1.331 1.431 0.100
OH- hydroxide anion rOH 0.964 1.061 0.097
NaK Sodium Potassium rNaK 3.589 3.686 0.097
NaLi lithium sodium rLiNa 2.889 2.983 0.094
BrO Bromine monoxide rOBr 1.718 1.811 0.093
CH3OCl methyl hypochlorite rCO 1.389 1.482 0.093
NO- nitric oxide anion rNO 1.258 1.348 0.090
He2+ helium dimer cation rHeHe 1.081 1.170 0.089
NO- nitric oxide anion rNO 1.258 1.347 0.089
C2 Carbon diatomic rCC 1.243 1.331 0.088
O2+ diatomic oxygen cation rOO 1.116 1.203 0.086
KBr Potassium Bromide rKBr 2.821 2.907 0.086
CuCl Copper monochloride rCuCl 2.051 1.968 -0.083
NF nitrogen fluoride rNF 1.317 1.392 0.075
ZnS Zinc sulfide rSZn 2.046 1.972 -0.075
HCNO fulminic acid rNO 1.199 1.273 0.074
CH2O2 Dioxirane rCO 1.388 1.459 0.072
CH3CH2O Ethoxy radical rCO 1.388 1.459 0.071
NCl nitrogen monochloride rNCl 1.611 1.675 0.064
NH2OH hydroxylamine rNO 1.453 1.515 0.062
CH3I methyl iodide rCI 2.136 2.197 0.061
SeO Selenium monoxide rSeO 1.639 1.700 0.060
CH2O2 Dioxirane rOO 1.516 1.576 0.060
HCF Fluoromethylene rCF 1.305 1.365 0.060
C3H8O2 1,3-Propanediol rCO 1.410 1.470 0.060
CF2 Difluoromethylene rCF 1.297 1.357 0.059
MgH+ magnesium monohydride cation rHMg 1.652 1.711 0.059
HN3 hydrogen azide rNH 0.975 1.032 0.057
BH3NH3 borane ammonia rBN 1.645 1.700 0.055
SO Sulfur monoxide rSO 1.481 1.536 0.055
H2O2 Hydrogen peroxide rOO 1.475 1.530 0.055
HCF Fluoromethylene rCH 1.138 1.088 -0.050
I2 Iodine diatomic rII 2.665 2.716 0.050
48 molecules.