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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 QCISD/6-31+G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.218 3.133
Be2 Beryllium diatomic rBeBe 2.460 5.171 2.711
C4H6 1-Methylcyclopropene rCH 1.087 3.428 2.341
Mg2 Magnesium diatomic rMgMg 3.891 5.249 1.358
Mg2 Magnesium diatomic rMgMg 3.891 5.249 1.358
C2H4O3 trioxolane124 rCN 1.303 2.198 0.895
C4H6 1-Methylcyclopropene rCC 1.476 2.261 0.785
HSSSH trisulfane rHS 1.344 2.081 0.738
HSSSH trisulfane rHS 1.344 2.081 0.738
HSSSH trisulfane rHS 1.344 2.081 0.737
HSSSH trisulfane rHS 1.344 2.081 0.737
S4 Sulfur tetramer rSS 2.155 2.891 0.736
CH3CH2SH ethanethiol rCH 1.095 1.831 0.736
CH3CH2SH ethanethiol rCH 1.095 1.831 0.736
C4H6 1-Methylcyclopropene rCH 1.087 1.822 0.735
CH3CH2SH ethanethiol rCH 1.095 1.828 0.733
C4H6 1-Methylcyclopropene rCH 1.098 1.776 0.678
C4H6 1-Methylcyclopropene rCH 1.098 1.762 0.664
Be2 Beryllium diatomic rBeBe 2.460 1.860 -0.600
ONNO NO dimer rNN 2.236 1.755 -0.481
CH3SO2NH2 methanesulfonamide rCN 1.207 1.682 0.475
S4 Sulfur tetramer rSS 2.155 2.601 0.446
C4H6 1-Methylcyclopropene rCH 1.070 1.511 0.441
C4H10O Methyl propyl ether rCC 1.530 1.093 -0.437
CH3CH2SH ethanethiol rCH 1.089 1.526 0.437
CH3CH2SH ethanethiol rCH 1.089 1.526 0.437
CH3CH2SH ethanethiol rCH 1.089 1.525 0.436
CH3CH2SH ethanethiol rCH 1.092 1.526 0.434
CH3CH2SH ethanethiol rCH 1.092 1.526 0.434
CH3CH2SH ethanethiol rCH 1.092 1.525 0.433
Be2 Beryllium diatomic rBeBe 2.460 2.028 -0.432
C4H6 1-Methylcyclopropene rCC 1.515 1.089 -0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.516 0.423
C2H4F2 1,2-difluoroethane rCH 1.093 1.516 0.423
C2H4F2 1,2-difluoroethane rCH 1.093 1.505 0.412
C2H4F2 1,2-difluoroethane rCH 1.093 1.505 0.412
Al2 Aluminum diatomic rAlAl 2.701 2.297 -0.404
Al2 Aluminum diatomic rAlAl 2.701 2.297 -0.404
CH2CHCH2F Allyl Fluoride rHC 1.130 1.500 0.370
CH2CHCH2F Allyl Fluoride rHC 1.130 1.496 0.366
C3H3NO Isoxazole rCH 1.075 1.430 0.355
GaP Gallium monophosphide rPGa 2.450 2.117 -0.333
GaP Gallium monophosphide rPGa 2.450 2.117 -0.333
GaP Gallium monophosphide rPGa 2.450 2.117 -0.333
GaP Gallium monophosphide rPGa 2.450 2.117 -0.333
Ar2 Argon diatomic rArAr 3.758 4.084 0.326
C4H10O Methyl propyl ether rCH 1.099 1.419 0.320
CH3CH2SH ethanethiol rCC 1.528 1.831 0.303
CH3CH2SH ethanethiol rCC 1.528 1.831 0.303
CH3CH2SH ethanethiol rCC 1.528 1.828 0.300
CH3CH2SH ethanethiol rCS 1.820 1.525 -0.295
CH3CH2SH ethanethiol rCS 1.820 1.526 -0.294
CH3CH2SH ethanethiol rCS 1.820 1.526 -0.294
AlP Aluminum monophosphide rAlP 2.400 2.113 -0.287
AlP Aluminum monophosphide rAlP 2.400 2.113 -0.287
AlP Aluminum monophosphide rAlP 2.400 2.113 -0.287
Al2 Aluminum diatomic rAlAl 2.701 2.950 0.249
S4 Sulfur tetramer rSS 1.898 2.138 0.240
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.270 0.230
C2H2+ acetylene cation rCH 1.077 1.306 0.229
Si2H2 disilyne rSiSi 2.215 1.989 -0.226
C4H6 1-Methylcyclopropene rCC 1.300 1.514 0.214
Si2H2 disilyne rSiH 1.668 1.457 -0.211
GaP Gallium monophosphide rPGa 2.450 2.244 -0.206
GaP Gallium monophosphide rPGa 2.450 2.244 -0.206
GaP Gallium monophosphide rPGa 2.450 2.244 -0.206
GaP Gallium monophosphide rPGa 2.450 2.244 -0.206
CaS Calcium sulfide rSCa 2.318 2.524 0.206
Ar2+ Argon diatomic cation rArAr 2.320 2.512 0.192
K2 Potassium diatomic rKK 3.905 4.093 0.188
Si2H2 disilyne rSiH 1.668 1.484 -0.184
S3 Sulfur trimer rSS 1.917 2.099 0.182
ClF3 Chlorine trifluoride rFCl 1.597 1.765 0.169
ClF3 Chlorine trifluoride rFCl 1.597 1.765 0.169
Si2 Silicon diatomic rSiSi 2.246 2.083 -0.163
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.521 0.162
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
AlP Aluminum monophosphide rAlP 2.400 2.240 -0.160
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.081 -0.159
AlP Aluminum monophosphide rAlP 2.260 2.113 -0.147
AlP Aluminum monophosphide rAlP 2.260 2.113 -0.147
AlP Aluminum monophosphide rAlP 2.260 2.113 -0.147
CaOH Calcium monohydroxide rOCa 1.976 2.114 0.138
CaBr Calcium monobromide rCaBr 2.594 2.731 0.137
CaCl calcium monochloride rClCa 2.437 2.574 0.137
GaP Gallium monophosphide rPGa 2.110 2.244 0.134
GaP Gallium monophosphide rPGa 2.110 2.244 0.134
GaP Gallium monophosphide rPGa 2.110 2.244 0.134
GaP Gallium monophosphide rPGa 2.110 2.244 0.134
CaC Calcium monocarbide rCCa 2.302 2.435 0.134
GaP Gallium monophosphide rPGa 2.250 2.117 -0.133
GaP Gallium monophosphide rPGa 2.250 2.117 -0.133
GaP Gallium monophosphide rPGa 2.250 2.117 -0.133
GaP Gallium monophosphide rPGa 2.250 2.117 -0.133
CaF Calcium monofluoride rFCa 1.967 2.097 0.130
N2 Nitrogen diatomic rNN 1.098 1.226 0.129
N2 Nitrogen diatomic rNN 1.098 1.226 0.129
GaP Gallium monophosphide rPGa 2.240 2.117 -0.123
GaP Gallium monophosphide rPGa 2.240 2.117 -0.123
GaP Gallium monophosphide rPGa 2.240 2.117 -0.123
GaP Gallium monophosphide rPGa 2.240 2.117 -0.123
CaH Calcium monohydride rCaH 2.003 2.123 0.121
CaH Calcium monohydride rCaH 2.003 2.123 0.121
AlP Aluminum monophosphide rAlP 2.220 2.113 -0.107
AlP Aluminum monophosphide rAlP 2.220 2.113 -0.107
AlP Aluminum monophosphide rAlP 2.220 2.113 -0.107
LiK Lithium Potassium rLiK 3.270 3.376 0.106
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
KCl Potassium Chloride rKCl 2.667 2.763 0.096
KF Potassium Fluoride rKF 2.171 2.267 0.096
CO Carbon monoxide rCO 1.128 1.222 0.094
Si2H2 disilyne rSiSi 2.215 2.123 -0.093
Si2H2 disilyne rSiSi 2.215 2.126 -0.090
N2O3 Dinitrogen trioxide rNN 1.864 1.775 -0.089
Na2 Sodium diatomic rNaNa 3.079 3.166 0.087
Na2 Sodium diatomic rNaNa 3.079 3.166 0.087
Na2 Sodium diatomic rNaNa 3.079 3.166 0.087
KBr Potassium Bromide rKBr 2.821 2.907 0.086
BrO+ Bromine monoxide cation rOBr 1.635 1.716 0.081
C2 Carbon diatomic rCC 1.243 1.321 0.079
C2 Carbon diatomic rCC 1.243 1.321 0.079
SeO3 selenium trioxide rSeO 1.688 1.611 -0.077
B4H10 Tetraborane(10) rHB 1.484 1.407 -0.077
CaBr2 Calcium dibromide rCaBr 2.616 2.692 0.076
KOH Potassium hydroxide rOK 2.212 2.286 0.075
KH Potassium hydride rKH 2.243 2.316 0.074
KH Potassium hydride rKH 2.243 2.316 0.074
N2O4 Dinitrogen tetroxide rNN 1.782 1.708 -0.074
Si2 Silicon diatomic rSiSi 2.246 2.174 -0.072
SiP Silicon monophosphide rSiP 2.078 2.005 -0.072
FSN Thiazyl fluoride rFS 1.643 1.714 0.071
ClF3 Chlorine trifluoride rFCl 1.697 1.765 0.069
ClF3 Chlorine trifluoride rFCl 1.697 1.765 0.069
B4H10 Tetraborane(10) rHB 1.315 1.247 -0.068
ClSSCl Disulfur dichloride rSS 1.931 1.998 0.067
NaLi lithium sodium rLiNa 2.889 2.956 0.067
NaLi lithium sodium rLiNa 2.889 2.956 0.067
AlN Aluminum nitride rNAl 1.786 1.720 -0.067
C4H8O2 Ethyl acetate rCO 1.448 1.514 0.066
Li2 Lithium diatomic rLiLi 2.673 2.739 0.066
Li2 Lithium diatomic rLiLi 2.673 2.739 0.066
BN boron nitride rBN 1.325 1.259 -0.066
BN boron nitride rBN 1.325 1.259 -0.066
SiC silicon monocarbide rCSi 1.722 1.657 -0.065
SiC silicon monocarbide rCSi 1.722 1.657 -0.065
C2H2+ acetylene cation rCC 1.253 1.314 0.061
B2 Boron diatomic rBB 1.590 1.529 -0.061
B2 Boron diatomic rBB 1.590 1.529 -0.061
GeF Germanium monofluoride rFGe 1.745 1.806 0.061
GeF Germanium monofluoride rFGe 1.745 1.806 0.061
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.663 0.060
MgO magnesium oxide rMgO 1.749 1.808 0.059
NBr nitrogen monobromide rNBr 1.765 1.823 0.058
GeF+ Germanium monofluoride cation rFGe 1.665 1.724 0.058
FOO Dioxygen monofluoride radical rFO 1.649 1.592 -0.057
HClO4 perchloric acid rOCl 1.404 1.461 0.057
OClO Chlorine dioxide rClO 1.470 1.525 0.055
OClO Chlorine dioxide rClO 1.470 1.525 0.055
BrO Bromine monoxide rOBr 1.718 1.773 0.055
Li2+ lithium diatomic cation rLiLi 3.112 3.166 0.055
GeH3F monofluorogermane rGeF 1.731 1.785 0.054
SO2F2 Sulfuryl fluoride rFS 1.530 1.584 0.054
NaO sodium monoxide rONa 2.052 1.998 -0.054
NaO sodium monoxide rONa 2.052 1.998 -0.054
HCF Fluoromethylene rCH 1.138 1.085 -0.053
HCF Fluoromethylene rCH 1.138 1.085 -0.053
NaF sodium fluoride rNaF 1.926 1.979 0.053
NaF sodium fluoride rNaF 1.926 1.979 0.053
GeF4 Germanium tetrafluoride rFGe 1.670 1.723 0.053
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
NO3 Nitrogen trioxide rNO 1.238 1.290 0.052
LiBr Lithium Bromide rLiBr 2.170 2.222 0.051
LiBr Lithium Bromide rLiBr 2.170 2.222 0.051
GaCl3 Gallium trichloride rClGa 2.180 2.129 -0.051
GaCl3 Gallium trichloride rClGa 2.180 2.129 -0.051
PF phosphorus monofluoride rFP 1.593 1.643 0.050
GeF2 Germanium difluoride rGeCl 1.732 1.782 0.050
186 molecules.