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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 MP2FU/6-31G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
CH3NHCH3 Dimethylamine rCH 1.084 3.352 2.268
C3H4 cyclopropene rCH 1.088 2.486 1.398
C3H4 cyclopropene rCH 1.072 2.311 1.239
HBO Boron hydride oxide rBO 1.200 2.388 1.188
H2ONH3 Water Ammonia Dimer rNH 2.983 1.988 -0.995
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 2.344 0.914
Be2 Beryllium diatomic rBeBe 2.460 1.787 -0.673
Ne2 Neon dimer rNeNe 3.100 2.589 -0.511
Mg2 Magnesium diatomic rMgMg 3.891 4.393 0.502
C4H6O2 2,3-Butanedione rCH 1.114 1.534 0.420
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.526 0.413
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.523 0.410
C4H8O2 1,3-Dioxane rCH 1.095 1.408 0.313
Al2 Aluminum diatomic rAlAl 2.701 2.960 0.259
Al2 Aluminum diatomic rAlAl 2.701 2.469 -0.232
B2 Boron diatomic rBB 1.590 1.386 -0.204
Cu2 Copper dimer rCuCu 2.220 2.017 -0.203
Si2 Silicon diatomic rSiSi 2.246 2.068 -0.178
NO3 Nitrogen trioxide rNO 1.238 1.389 0.152
AlN Aluminum nitride rNAl 1.786 1.640 -0.146
CaCl calcium monochloride rClCa 2.437 2.566 0.129
CaH Calcium monohydride rHCa 2.003 2.130 0.128
CuO Copper Monoxide rCuO 1.724 1.599 -0.126
Na2+ sodium dimer cation rNaNa 3.540 3.652 0.112
HCO Formyl radical rCH 1.080 1.191 0.111
CuF Copper monofluoride rCuF 1.745 1.638 -0.107
ClF+ clorine monofluoride cation rFCl 1.448 1.555 0.106
Li2 Lithium diatomic rLiLi 2.673 2.773 0.100
CaOH Calcium monohydroxide rOCa 1.976 2.074 0.098
ClFO3 Perchloryl fluoride rFCl 1.598 1.680 0.082
PS phosphorus sulfide rPS 1.900 1.820 -0.080
NaLi lithium sodium rLiNa 2.889 2.968 0.079
C2 Carbon diatomic rCC 1.243 1.321 0.079
FO2 Dioxygen monofluoride rFO 1.649 1.571 -0.078
CuH Copper monohydride rHCu 1.463 1.386 -0.077
CaF Calcuium monofluoride rFCa 1.967 2.044 0.077
KH Potassium hydride rHK 2.243 2.318 0.075
HCO Formyl radical rCO 1.198 1.123 -0.075
PCl5 Phosphorus pentachloride rPCl 2.214 2.139 -0.075
LiO lithium oxide rLiO 1.688 1.613 -0.075
KCl Potassium Chloride rKCl 2.667 2.741 0.074
Na2 Sodium diatomic rNaNa 3.079 3.153 0.074
SeO Selenium monoxide rSeO 1.639 1.712 0.073
N2O3 Dinitrogen trioxide rNN 1.864 1.936 0.072
He2+ helium dimer cation rHeHe 1.081 1.152 0.071
O2+ diatomic oxygen cation rOO 1.116 1.187 0.071
SO Sulfur monoxide rSO 1.481 1.551 0.070
B2 Boron diatomic rBB 1.590 1.521 -0.069
CuCl Copper monochloride rCuCl 2.051 1.983 -0.069
ClNO2 Nitryl chloride rNCl 1.840 1.907 0.067
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.517 -0.063
NS Mononitrogen monosulfide rNS 1.497 1.435 -0.063
PF5 Phosphorus pentafluoride rPF 1.534 1.595 0.061
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.341 -0.059
HNO2 Nitrous acid rNO 1.442 1.385 -0.057
SO+ sulfur monoxide cation rOS 1.424 1.481 0.057
ClNO Nitrosyl chloride rNCl 1.975 2.031 0.056
CO Carbon monoxide rCO 1.206 1.150 -0.056
CO Carbon monoxide rCO 1.206 1.150 -0.056
BHCl2 Borane, dichloro- rBH 1.130 1.185 0.055
C5H10 2-Pentene, (E)- rCC 1.576 1.523 -0.053
HCF Fluoromethylene rCH 1.138 1.085 -0.053
C3H5 Allyl radical rCC 1.428 1.377 -0.051
SO2F2 Sulfuryl fluoride rFS 1.530 1.581 0.051
65 molecules.