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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/aug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 1.958 -1.025
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
Al2 Aluminum diatomic rAlAl 2.701 2.275 -0.426
Al2 Aluminum diatomic rAlAl 2.701 2.991 0.290
Mg2 Magnesium diatomic rMgMg 3.891 4.138 0.248
B2 Boron diatomic rBB 1.590 1.381 -0.209
Na2+ sodium dimer cation rNaNa 3.540 3.711 0.171
Si2 Silicon diatomic rSiSi 2.246 2.078 -0.168
AlN Aluminum nitride rNAl 1.786 1.642 -0.144
Na2 Sodium diatomic rNaNa 3.079 3.177 0.098
NaLi lithium sodium rLiNa 2.889 2.975 0.086
ClF+ clorine monofluoride cation rFCl 1.448 1.532 0.084
Li2 Lithium diatomic rLiLi 2.673 2.750 0.077
NS Mononitrogen monosulfide rNS 1.497 1.421 -0.076
Si2 Silicon diatomic rSiSi 2.246 2.170 -0.076
C2 Carbon diatomic rCC 1.243 1.317 0.074
NaF sodium fluoride rNaF 1.926 1.999 0.073
PS phosphorus sulfide rPS 1.900 1.829 -0.071
B2 Boron diatomic rBB 1.590 1.521 -0.069
CO Carbon monoxide rCO 1.206 1.139 -0.067
CO Carbon monoxide rCO 1.206 1.139 -0.067
Ne2 Neon dimer rNeNe 3.100 3.164 0.064
HCF Fluoromethylene rCH 1.138 1.082 -0.056
NaCl Sodium Chloride rNaCl 2.361 2.413 0.052
NaBr Sodium Bromide rNaBr 2.502 2.553 0.051
25 molecules.