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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 PBE1PBE/6-31G*

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 1.911 -1.072
C3H8O2 Propylene glycol rCO 1.420 2.724 1.304
C3H8O2 Propylene glycol rCC 1.540 2.665 1.125
C3H8O2 Propylene glycol rOH 1.000 1.514 0.514
C3H8O2 Propylene glycol rCH 1.095 0.970 -0.125
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.468 0.420
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.417 1.300
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.175 0.729
C3H3NO Isoxazole rCH 1.075 1.419 0.344
C2H4O3 trioxolane124 rCN 1.303 2.173 0.870
C4H10O Methyl propyl ether rCC 1.530 1.096 -0.434
C4H10O Methyl propyl ether rCH 1.099 1.399 0.300
CaO Calcium monoxide rOCa 1.822 2.018 0.196
C4H6 1-Methylcyclopropene rCH 1.085 4.218 3.133
C4H6 1-Methylcyclopropene rCH 1.087 3.415 2.328
C4H6 1-Methylcyclopropene rCC 1.476 2.258 0.782
C4H6 1-Methylcyclopropene rCH 1.087 1.826 0.739
C4H6 1-Methylcyclopropene rCH 1.098 1.780 0.682
C4H6 1-Methylcyclopropene rCH 1.098 1.761 0.663
C4H6 1-Methylcyclopropene rCH 1.070 1.504 0.434
C4H6 1-Methylcyclopropene rCC 1.515 1.096 -0.419
C4H6 1-Methylcyclopropene rCC 1.300 1.500 0.200
CH3SO2NH2 methanesulfonamide rCN 1.207 1.680 0.474
He2+ helium diatomic cation rHeHe 1.081 1.209 0.128
GaP Gallium monophosphide rPGa 2.450 2.216 -0.234
Cu2 Copper diatomic rCuCu 2.220 2.023 -0.196
NaO sodium monoxide rONa 2.052 1.920 -0.131
Ar2+ Argon diatomic cation rArAr 2.320 2.587 0.267
Ar2 Argon diatomic rArAr 3.758 3.929 0.171
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.276 0.236
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.082 -0.158
CaH Calcium monohydride rCaH 2.003 2.118 0.115
FOO Dioxygen monofluoride radical rFO 1.649 1.541 -0.108
CaCl calcium monochloride rClCa 2.437 2.554 0.117
CaS Calcium sulfide rSCa 2.318 2.469 0.151
AlP Aluminum monophosphide rAlP 2.400 2.217 -0.183
AlP Aluminum monophosphide rAlP 2.220 2.078 -0.142
K2 Potassium diatomic rKK 3.905 4.013 0.108
Mg2 Magnesium diatomic rMgMg 3.891 3.577 -0.314
CaC Calcium monocarbide rCCa 2.302 2.408 0.106
40 molecules.