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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 MP2FC/6-31G(2df,p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Mg2 Magnesium diatomic rMgMg 3.891 2.558 -1.332
Be2 Beryllium diatomic rBeBe 2.460 1.830 -0.630
Ne2 Neon dimer rNeNe 3.100 2.531 -0.569
Al2 Aluminum diatomic rAlAl 2.701 2.271 -0.430
C4H6O2 2,3-Butanedione rCH 1.114 1.537 0.423
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.528 0.415
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.524 0.411
C4H8O2 1,3-Dioxane rCH 1.095 1.400 0.305
Al2 Aluminum diatomic rAlAl 2.701 2.991 0.290
B2 Boron diatomic rBB 1.590 1.385 -0.205
Cu2 Copper dimer rCuCu 2.220 2.016 -0.204
Si2 Silicon diatomic rSiSi 2.246 2.076 -0.170
Na2+ sodium dimer cation rNaNa 3.540 3.700 0.160
AlN Aluminum nitride rNAl 1.786 1.631 -0.155
NaK Sodium Potassium rNaK 3.589 3.444 -0.145
CuO Copper Monoxide rCuO 1.724 1.589 -0.136
Li2 Lithium diatomic rLiLi 2.673 2.780 0.107
CuF Copper monofluoride rCuF 1.745 1.639 -0.106
CuCl Copper monochloride rCuCl 2.051 1.954 -0.098
CP Carbon monophosphide rCP 1.562 1.657 0.095
Na2 Sodium diatomic rNaNa 3.079 3.172 0.093
PCl5 Phosphorus pentachloride rPCl 2.214 2.124 -0.090
CaCl calcium monochloride rClCa 2.437 2.523 0.086
NaLi lithium sodium rLiNa 2.889 2.974 0.085
CaH Calcium monohydride rHCa 2.003 2.086 0.084
ClF+ clorine monofluoride cation rFCl 1.448 1.532 0.083
CuH Copper monohydride rHCu 1.463 1.381 -0.082
Si2 Silicon diatomic rSiSi 2.246 2.169 -0.077
C2 Carbon diatomic rCC 1.243 1.319 0.077
B2 Boron diatomic rBB 1.590 1.521 -0.069
LiO lithium oxide rLiO 1.688 1.621 -0.067
ClNO2 Nitryl chloride rNCl 1.840 1.907 0.067
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
C3H5 Allyl radical rCC 1.428 1.373 -0.055
BHCl2 Borane, dichloro- rBH 1.130 1.182 0.052
35 molecules.