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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 HF/TZVP

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
H2ONH3 Water Ammonia Dimer rNH 2.983 2.085 -0.898
C3H8O2 Propylene glycol rCO 1.420 2.746 1.326
C3H8O2 Propylene glycol rCC 1.540 2.659 1.119
C3H8O2 Propylene glycol rOH 1.000 1.515 0.515
C3H8O2 Propylene glycol rCH 1.095 0.943 -0.152
C4H4N2O2 Uracil rNH 0.836 0.992 0.156
C4H4N2O2 Uracil rCH 0.931 1.068 0.137
C4H4N2O2 Uracil rNH 0.877 0.996 0.119
C4H4N2O2 Uracil rCH 0.957 1.072 0.115
CH3CHSHCH3 2-Propanethiol rSH 1.345 1.113 -0.232
CH3CHSHCH3 2-Propanethiol rCS 1.849 1.741 -0.108
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.464 0.416
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.407 1.290
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.167 0.721
C3H7SH 1-Propanethiol rSH 1.336 1.123 -0.213
C3H3NO Isoxazole rCH 1.075 1.427 0.352
C2H4O3 trioxolane124 rCN 1.303 2.157 0.854
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.050 -0.350
CH2SHCH2SH 1,2-Ethanedithiol rCS 1.819 1.669 -0.150
CH3CH(CH3)ONO Isopropyl nitrite rON 1.414 1.296 -0.118
C4H10O Methyl propyl ether rCC 1.530 1.086 -0.444
C4H10O Methyl propyl ether rCH 1.099 1.391 0.292
CaO Calcium monoxide rOCa 1.822 2.176 0.353
C4H6 1-Methylcyclopropene rCH 1.085 4.172 3.087
C4H6 1-Methylcyclopropene rCH 1.087 3.405 2.318
C4H6 1-Methylcyclopropene rCC 1.476 2.243 0.767
C4H6 1-Methylcyclopropene rCH 1.087 1.808 0.721
C4H6 1-Methylcyclopropene rCH 1.098 1.764 0.666
C4H6 1-Methylcyclopropene rCH 1.098 1.750 0.652
C4H6 1-Methylcyclopropene rCC 1.515 1.083 -0.432
C4H6 1-Methylcyclopropene rCH 1.070 1.495 0.425
C4H6 1-Methylcyclopropene rCC 1.300 1.496 0.196
CH3SO2NH2 methanesulfonamide rCN 1.207 1.656 0.449
C4H5N Cyclopropanecarbonitrile rCC 1.513 1.620 0.107
KCl Potassium Chloride rKCl 2.667 2.831 0.165
KH Potassium hydride rKH 2.243 2.386 0.144
KBr Potassium Bromide rKBr 2.821 2.992 0.171
CuCl Copper monochloride rCuCl 2.051 2.189 0.137
F2+ flourine diatomic cation rFF 1.322 1.218 -0.104
KF Potassium Fluoride rKF 2.171 2.297 0.126
FNO Nitrosyl fluoride rNF 1.512 1.395 -0.117
FNO3 Fluorine nitrate rNO 1.507 1.396 -0.111
CaBr2 Calcium dibromide rCaBr 2.616 2.753 0.137
FNO2 Nitryl fluoride rNF 1.467 1.348 -0.119
CaBr Calcium monobromide rCaBr 2.594 2.801 0.207
N2O4 Dinitrogen tetroxide rNN 1.782 1.604 -0.178
N2O3 Dinitrogen trioxide rNN 1.864 1.611 -0.253
LiK Lithium Potassium rLiK 3.270 3.511 0.241
NO3 Nitrogen trioxide rNO 1.238 1.341 0.103
VO Vanadium monoxide rVO 1.589 1.759 0.169
NaK Sodium Potassium rNaK 3.589 3.702 0.113
GaP Gallium monophosphide rPGa 2.450 2.313 -0.137
CaOH Calcium monohydroxide rOCa 1.976 2.127 0.151
Ne2 Neon diatomic rNeNe 3.100 3.469 0.369
Cu2 Copper diatomic rCuCu 2.220 2.435 0.216
NaLi lithium sodium rLiNa 2.889 3.002 0.113
Ar2 Argon diatomic rArAr 3.758 4.763 1.005
Ar2+ Argon diatomic cation rArAr 2.320 2.475 0.155
Si2 Silicon diatomic rSiSi 2.246 2.146 -0.100
CuH Copper monohydride rCuH 1.463 1.567 0.104
SeO3 selenium trioxide rSeO 1.688 1.553 -0.134
CaF Calcium monofluoride rFCa 1.967 2.119 0.152
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.290 0.250
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.087 -0.153
HSSSH trisulfane rHS 1.344 2.076 0.732
Li2 Lithium diatomic rLiLi 2.673 2.779 0.106
Be2 Beryllium diatomic rBeBe 2.460 4.980 2.520
CaH Calcium monohydride rCaH 2.003 2.172 0.170
FOO Dioxygen monofluoride radical rFO 1.649 3.462 1.813
CaCl calcium monochloride rClCa 2.437 2.649 0.212
S4 Sulfur tetramer rSS 2.155 1.998 -0.157
CaS Calcium sulfide rSCa 2.318 2.579 0.261
AlP Aluminum monophosphide rAlP 2.400 2.273 -0.127
AlP Aluminum monophosphide rAlP 2.220 2.113 -0.107
Na2 Sodium diatomic rNaNa 3.079 3.213 0.134
K2 Potassium diatomic rKK 3.905 4.187 0.282
Mg2 Magnesium diatomic rMgMg 3.891 7.522 3.631
CaC Calcium monocarbide rCCa 2.302 2.480 0.179
78 molecules.