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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(2df,p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Ne2 Neon dimer rNeNe 3.100 2.527 -0.573
C4H6O2 2,3-Butanedione rCH 1.114 1.530 0.416
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.523 0.410
CH2ClCH2CH3 Propane, 1-chloro- rCH 1.113 1.519 0.406
C4H8O2 1,3-Dioxane rCH 1.095 1.396 0.301
Al2 Aluminum diatomic rAlAl 2.701 2.960 0.258
Cu2 Copper dimer rCuCu 2.220 1.984 -0.236
B2 Boron diatomic rBB 1.590 1.379 -0.211
Si2 Silicon diatomic rSiSi 2.246 2.058 -0.188
NaK Sodium Potassium rNaK 3.589 3.415 -0.174
AlN Aluminum nitride rNAl 1.786 1.624 -0.162
CuF Copper monofluoride rCuF 1.745 1.617 -0.127
CuCl Copper monochloride rCuCl 2.051 1.938 -0.114
ZnS Zinc sulfide rSZn 2.046 2.159 0.112
CuH Copper monohydride rHCu 1.463 1.368 -0.095
CaCl calcium monochloride rClCa 2.437 2.521 0.084
CaH Calcium monohydride rHCa 2.003 2.086 0.084
ClF+ clorine monofluoride cation rFCl 1.448 1.527 0.079
B2 Boron diatomic rBB 1.590 1.516 -0.074
C2 Carbon diatomic rCC 1.243 1.316 0.074
CuO Copper Monoxide rCuO 1.724 1.655 -0.069
NaLi lithium sodium rLiNa 2.889 2.822 -0.067
CBrCl3 Methane, bromotrichloro- rCBr 1.944 1.891 -0.053
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.880 -0.050
24 molecules.