return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Geometry > Bad Calculations > Bad Calculated Bond Lengths OR Resources > Bad Calculations > Geometry > Bad Calculated Bond Lengths

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/daug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Li2 Lithium diatomic rLiLi 2.673 8.163 5.490
Mg2 Magnesium diatomic rMgMg 3.891 7.343 3.452
C4H6 1-Methylcyclopropene rCH 1.085 4.170 3.085
C4H6 1-Methylcyclopropene rCH 1.087 3.402 2.315
FOO Dioxygen monofluoride radical rFO 1.649 3.813 2.164
H2SO4 Sulfuric acid rOH 0.970 2.813 1.843
C4H8S Thiophene, tetrahydro- rCC 1.532 3.290 1.758
Ar2 Argon diatomic rArAr 3.758 5.081 1.323
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.404 1.287
Ar2 Argon diatomic rArAr 3.758 4.981 1.223
CH2BrCl Methane, bromochloro- rCBr 1.928 1.071 -0.857
H2ONH3 Water Ammonia Dimer rNH 2.983 2.154 -0.829
C4H6 1-Methylcyclopropene rCC 1.476 2.241 0.765
CH3CH2SH ethanethiol rCH 1.095 1.826 0.731
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
ONNO NO dimer rNN 2.236 1.516 -0.720
ONNO NO dimer rNN 2.236 1.516 -0.720
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.165 0.719
C4H6 1-Methylcyclopropene rCH 1.087 1.806 0.719
HSSSH trisulfane rHS 1.344 2.059 0.716
HSSSH trisulfane rHS 1.344 2.059 0.716
HSSSH trisulfane rHS 1.344 2.059 0.715
HSSSH trisulfane rHS 1.344 2.059 0.715
C4H8S Thiophene, tetrahydro- rCH 1.117 1.829 0.712
S4 Sulfur tetramer rSS 2.155 2.860 0.705
CH2BrCl Methane, bromochloro- rCCl 1.755 1.071 -0.684
C4H6 1-Methylcyclopropene rCH 1.098 1.762 0.664
CH2BrCl Methane, bromochloro- rHC 1.115 1.765 0.650
C4H6 1-Methylcyclopropene rCH 1.098 1.748 0.650
Na2Cl2 Disodium dichloride rNaCl 2.584 3.227 0.643
ONNO NO dimer rNN 2.236 1.614 -0.622
C4H4N2 Succinonitrile rCC 1.561 1.081 -0.480
C4H6 1-Methylcyclopropene rCC 1.515 1.082 -0.433
CH3CH2SH ethanethiol rCH 1.089 1.522 0.433
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3SO2NH2 methanesulfonamide rCN 1.207 1.637 0.430
CH3CH2SH ethanethiol rCH 1.092 1.522 0.430
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
C4H6 1-Methylcyclopropene rCH 1.070 1.494 0.424
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.463 0.415
C4H4N2 Succinonitrile rCH 1.123 1.536 0.413
Be2 Beryllium diatomic rBeBe 2.460 2.048 -0.412
Be2 Beryllium diatomic rBeBe 2.460 2.048 -0.412
C2H4F2 1,2-difluoroethane rCH 1.093 1.503 0.410
C2H4F2 1,2-difluoroethane rCH 1.093 1.502 0.409
CH2CHCH2F Allyl Fluoride rHC 1.130 1.495 0.365
CH2CHCH2F Allyl Fluoride rHC 1.130 1.494 0.364
Al2 Aluminum diatomic rAlAl 2.701 2.342 -0.359
C4H4N2 Succinonitrile rCH 1.111 1.468 0.357
Ne2 Neon diatomic rNeNe 3.100 3.454 0.354
C3H3NO Isoxazole rCH 1.075 1.427 0.352
S4 Sulfur tetramer rSS 2.155 2.476 0.321
C4H8S Thiophene, tetrahydro- rCS 1.835 2.149 0.314
GaP Gallium monophosphide rPGa 2.450 2.148 -0.302
GaP Gallium monophosphide rPGa 2.450 2.148 -0.302
GaP Gallium monophosphide rPGa 2.450 2.148 -0.302
GaP Gallium monophosphide rPGa 2.450 2.148 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
Al2 Aluminum diatomic rAlAl 2.701 3.000 0.299
CH3CH2SH ethanethiol rCS 1.820 1.522 -0.298
CH3CH2SH ethanethiol rCC 1.528 1.826 0.298
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
AlP Aluminum monophosphide rAlP 2.400 2.117 -0.283
AlP Aluminum monophosphide rAlP 2.400 2.117 -0.283
AlP Aluminum monophosphide rAlP 2.400 2.117 -0.283
Si2H2 disilyne rSiSi 2.215 1.943 -0.272
N2O3 Dinitrogen trioxide rNN 1.864 1.602 -0.262
B2 Boron diatomic rBB 1.590 1.336 -0.254
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.286 0.246
C2H2+ acetylene cation rCH 1.077 1.315 0.238
ZnS Zinc sulfide rSZn 2.046 2.281 0.234
Cu2 Copper diatomic rCuCu 2.220 2.447 0.227
Si2H2 disilyne rSiH 1.668 1.452 -0.216
S4 Sulfur tetramer rSS 1.898 2.101 0.203
C4H6 1-Methylcyclopropene rCC 1.300 1.496 0.196
N2O4 Dinitrogen tetroxide rNN 1.782 1.592 -0.190
N2O4 Dinitrogen tetroxide rNN 1.782 1.592 -0.190
Si2H2 disilyne rSiH 1.668 1.480 -0.188
S4 Sulfur tetramer rSS 2.155 1.969 -0.186
Si2 Silicon diatomic rSiSi 2.246 2.060 -0.186
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.518 0.159
VO Vanadium monoxide rVO 1.589 1.747 0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.085 -0.155
C4H4N2O2 Uracil rNH 0.836 0.991 0.155
Al2 Aluminum diatomic rAlAl 2.701 2.549 -0.152
CuO Copper Monoxide rCuO 1.724 1.871 0.147
N2 Nitrogen diatomic rNN 1.213 1.067 -0.146
N2 Nitrogen diatomic rNN 1.213 1.067 -0.146
N2 Nitrogen diatomic rNN 1.213 1.067 -0.146
N2 Nitrogen diatomic rNN 1.213 1.067 -0.146
AlP Aluminum monophosphide rAlP 2.260 2.117 -0.143
AlP Aluminum monophosphide rAlP 2.260 2.117 -0.143
AlP Aluminum monophosphide rAlP 2.260 2.117 -0.143
SeO3 selenium trioxide rSeO 1.688 1.548 -0.139
SeO3 selenium trioxide rSeO 1.688 1.548 -0.139
C4H4N2O2 Uracil rCH 0.931 1.068 0.137
CH3COCH3 Acetone rCO 1.214 1.348 0.134
B2 Boron diatomic rBB 1.590 1.457 -0.133
AlP Aluminum monophosphide rAlP 2.400 2.268 -0.132
AlP Aluminum monophosphide rAlP 2.400 2.268 -0.132
AlP Aluminum monophosphide rAlP 2.400 2.268 -0.132
Si2H2 disilyne rSiSi 2.215 2.085 -0.130
Si2H2 disilyne rSiSi 2.215 2.085 -0.130
CuCl Copper monochloride rCuCl 2.051 2.180 0.129
FNO2 Nitryl fluoride rNF 1.467 1.339 -0.128
FNO Nitrosyl fluoride rNF 1.512 1.390 -0.122
FNO3 Fluorine nitrate rNO 1.507 1.385 -0.122
FNO Nitrosyl fluoride rNF 1.512 1.390 -0.122
C4H4N2O2 Uracil rNH 0.877 0.995 0.118
Ar2+ Argon diatomic cation rArAr 2.320 2.438 0.118
Na2 Sodium diatomic rNaNa 3.079 3.194 0.115
Na2 Sodium diatomic rNaNa 3.079 3.194 0.115
C4H4N2O2 Uracil rCH 0.957 1.072 0.115
Li2 Lithium diatomic rLiLi 2.673 2.784 0.111
NaLi lithium sodium rLiNa 2.889 3.000 0.111
NaLi lithium sodium rLiNa 2.889 2.999 0.110
F2+ flourine diatomic cation rFF 1.322 1.214 -0.108
CuH Copper monohydride rCuH 1.463 1.570 0.108
SiP Silicon monophosphide rSiP 2.078 1.970 -0.108
SiP Silicon monophosphide rSiP 2.078 1.970 -0.107
ScF Scandium monofluoride rFSc 1.788 1.893 0.105
AlP Aluminum monophosphide rAlP 2.220 2.117 -0.103
AlP Aluminum monophosphide rAlP 2.220 2.117 -0.103
AlP Aluminum monophosphide rAlP 2.220 2.117 -0.103
GaP Gallium monophosphide rPGa 2.250 2.148 -0.102
GaP Gallium monophosphide rPGa 2.250 2.148 -0.102
GaP Gallium monophosphide rPGa 2.250 2.148 -0.102
GaP Gallium monophosphide rPGa 2.250 2.148 -0.102
Si2 Silicon diatomic rSiSi 2.246 2.144 -0.102
HNO2 Nitrous acid rNO 1.442 1.345 -0.097
NO3 Nitrogen trioxide rNO 1.238 1.332 0.095
NO3 Nitrogen trioxide rNO 1.238 1.332 0.095
ClF5 chlorinepentafluoride rFCl 1.650 1.555 -0.095
SiC silicon monocarbide rCSi 1.722 1.628 -0.094
GaP Gallium monophosphide rPGa 2.240 2.148 -0.092
GaP Gallium monophosphide rPGa 2.240 2.148 -0.092
GaP Gallium monophosphide rPGa 2.240 2.148 -0.092
GaP Gallium monophosphide rPGa 2.240 2.148 -0.092
BN boron nitride rBN 1.325 1.234 -0.091
NaO sodium monoxide rONa 2.052 1.961 -0.090
N2 Nitrogen diatomic rNN 1.098 1.187 0.089
N2 Nitrogen diatomic rNN 1.098 1.187 0.089
C2H4O3 trioxolane124 rCN 1.303 1.392 0.089
H2O2 Hydrogen peroxide rOO 1.475 1.387 -0.088
H2O2 Hydrogen peroxide rOO 1.475 1.387 -0.088
F3NO Nitrogen trifluoride oxide rNF 1.431 1.343 -0.088
Si2H2 disilyne rSiH 1.668 1.756 0.088
B2 Boron diatomic rBB 1.590 1.503 -0.087
O3 Ozone rOO 1.278 1.194 -0.084
NO3 Nitrogen trioxide rNO 1.238 1.154 -0.084
F2 Fluorine diatomic rFF 1.412 1.328 -0.084
ClNO2 Nitryl chloride rNCl 1.840 1.757 -0.083
F2 Fluorine diatomic rFF 1.412 1.329 -0.083
C2H5NO3 Nitric acid, ethyl ester rNO 1.407 1.325 -0.082
CH2O2 Dioxirane rOO 1.516 1.434 -0.081
ClF3 Chlorine trifluoride rFCl 1.597 1.677 0.080
ClF3 Chlorine trifluoride rFCl 1.597 1.677 0.080
H2O2 Hydrogen peroxide rOO 1.475 1.395 -0.080
BH3CO Borane carbonyl rBC 1.534 1.613 0.079
BH3CO Borane carbonyl rBC 1.534 1.613 0.079
C3H3NO Isoxazole rCC 1.356 1.277 -0.079
CuF Copper monofluoride rCuF 1.745 1.824 0.079
HOF Hypofluorous acid rFO 1.442 1.364 -0.078
HOF Hypofluorous acid rFO 1.442 1.364 -0.078
H2COO Dioxymethyl radical rCO 1.272 1.196 -0.076
TiH Titanium monohydride rHTi 1.785 1.860 0.076
CH3ONO Methyl nitrite rNO 1.398 1.323 -0.075
Ne2+ Neon diatomic cation rNeNe 1.765 1.690 -0.075
SO2Cl2 Sulfuryl chloride rSCl 2.076 2.001 -0.075
BO2 Boron dioxide rBO 1.265 1.191 -0.074
AlO Aluminum monoxide rAlO 1.618 1.692 0.074
CH3NO3 Methyl nitrate rNO 1.402 1.328 -0.074
HNO3 Nitric acid rNO 1.406 1.332 -0.074
HNO3 Nitric acid rNO 1.406 1.332 -0.074
FNO3 Fluorine nitrate rFO 1.409 1.336 -0.073
KrF2 Krypton difluoride rFKr 1.875 1.803 -0.072
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.329 -0.071
C2Cl2 dichloroacetylene rCC 1.246 1.175 -0.071
F2O Difluorine monoxide rFO 1.405 1.335 -0.070
CF3OF Trifluoromethylhypofluorite rOF 1.421 1.353 -0.068
HClO4 perchloric acid rOCl 1.641 1.573 -0.068
ClOOCl Dichlorine dioxide rOO 1.426 1.358 -0.068
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.538 -0.065
HCF Fluoromethylene rCH 1.138 1.073 -0.065
HCF Fluoromethylene rCH 1.138 1.073 -0.065
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.515 -0.065
B4H10 Tetraborane(10) rHB 1.315 1.250 -0.065
H2O3 Hydrogen trioxide rOO 1.428 1.364 -0.064
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.994 0.064
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.994 0.064
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.994 0.064
C4H8O2 Ethyl acetate rCO 1.448 1.511 0.063
NF2 Difluoroamino radical rNF 1.370 1.307 -0.063
TiCl Titanium Monochloride rClTi 2.265 2.327 0.062
BH3PH3 borane phosphine rBP 1.937 1.999 0.062
ClSSCl Disulfur dichloride rSS 1.931 1.992 0.061
BrF5 bromine pentafluoride rFBr 1.774 1.713 -0.061
C5H8O 2H-Pyran, 3,4-dihydro- rCO 1.405 1.344 -0.061
HNO Nitrosyl hydride rNH 1.090 1.030 -0.060
BC boron monocarbide rBC 1.491 1.431 -0.060
BC boron monocarbide rBC 1.491 1.431 -0.060
B4H10 Tetraborane(10) rHB 1.484 1.424 -0.060
HNO Nitrosyl hydride rNH 1.090 1.030 -0.060
O2- oxygen diatomic anion rOO 1.350 1.291 -0.059
CH3CSNH2 Ethanethioamide rHN 1.050 0.991 -0.059
HPO Hydrogen phosphorus oxide rPO 1.512 1.453 -0.059
C3H8O2 Propylene glycol rOH 1.000 0.942 -0.058
B3N3H6 borazine rNH 1.050 0.992 -0.058
HCCl Chloromethylene rCH 1.119 1.061 -0.058
GaCl3 Gallium trichloride rClGa 2.180 2.123 -0.057
N2F2 (Z)-Difluorodiazene rNF 1.384 1.327 -0.057
GaAs Gallium arsenide rGaAs 2.530 2.587 0.057
GaAs Gallium arsenide rGaAs 2.530 2.587 0.057
CH3CHNOH Acetaldoxime rCC 1.550 1.493 -0.057
NH2OH hydroxylamine rNO 1.453 1.397 -0.056
C6H6 Fulvene rCH 1.130 1.074 -0.056
C4H4N2O2 Uracil rCO 1.245 1.189 -0.056
NH2OH hydroxylamine rNO 1.453 1.397 -0.056
NHF2 difluoramine rNF 1.400 1.344 -0.056
NH2F monofluoroamine rNF 1.433 1.377 -0.056
BeCl2 Beryllium chloride rBeCl 1.750 1.805 0.055
C3H8O2 1,3-Propanediol rCH 1.140 1.085 -0.055
C3H8O2 1,3-Propanediol rCH 1.140 1.085 -0.055
CFCl chlorofluoromethylene rCF 1.320 1.265 -0.055
C3H5Cl3 Propane, 1,2,3-trichloro- rCH 1.131 1.076 -0.055
C5H6 Bicyclo[2.1.0]pent-2-ene rCC 1.560 1.505 -0.055
O2+ diatomic oxygen cation rOO 1.116 1.062 -0.054
C5H6 Propellane rCC 1.596 1.542 -0.054
ClOF3 Chlorine trifluoride oxide rFCl 1.713 1.659 -0.054
CO Carbon monoxide rCO 1.128 1.182 0.054
HOBr Hypobromous acid rBrO 1.834 1.780 -0.054
CH3CH2NH2 Ethylamine rNH 1.052 0.998 -0.054
BH Boron monohydride rBH 1.232 1.179 -0.054
AlN Aluminum nitride rNAl 1.786 1.733 -0.054
ClNO Nitrosyl chloride rNCl 1.975 1.922 -0.053
P2+ phosphorus diatomic cation rPP 1.986 1.933 -0.053
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
C5H10 2-Pentene, (E)- rCC 1.576 1.523 -0.053
ClFO3 Perchloryl fluoride rFCl 1.598 1.545 -0.053
BrNO Nitrosyl bromide rNO 1.146 1.093 -0.053
BrF3 Bromine trifluoride rFBr 1.721 1.668 -0.053
O2 Oxygen diatomic rOO 1.208 1.155 -0.053
O2 Oxygen diatomic rOO 1.208 1.155 -0.052
ClNO Nitrosyl chloride rNCl 1.975 1.923 -0.052
FSSF Difluorodisulfane rSS 1.890 1.942 0.052
SO Sulfur monoxide rOS 1.500 1.449 -0.051
SO Sulfur monoxide rOS 1.500 1.449 -0.051
SO Sulfur monoxide rOS 1.500 1.449 -0.051
SO Sulfur monoxide rOS 1.500 1.449 -0.051
SeO2 Selenium dioxide rSeO 1.607 1.557 -0.050
252 molecules.