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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 PBEPBE/6-31G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.247 3.162
C4H6 1-Methylcyclopropene rCH 1.087 3.436 2.349
C2H4O3 trioxolane124 rCN 1.303 2.202 0.899
C4H6 1-Methylcyclopropene rCC 1.476 2.275 0.799
S4 Sulfur tetramer rSS 2.155 2.917 0.762
HSSSH trisulfane rHS 1.344 2.098 0.755
HSSSH trisulfane rHS 1.344 2.098 0.755
HSSSH trisulfane rHS 1.344 2.098 0.754
HSSSH trisulfane rHS 1.344 2.098 0.754
CH3CH2SH ethanethiol rCH 1.095 1.849 0.754
CH3CH2SH ethanethiol rCH 1.095 1.849 0.754
C4H6 1-Methylcyclopropene rCH 1.087 1.839 0.752
CH3CH2SH ethanethiol rCH 1.095 1.845 0.750
C4H6 1-Methylcyclopropene rCH 1.098 1.791 0.693
C4H6 1-Methylcyclopropene rCH 1.098 1.769 0.671
Ne2 Neon diatomic rNeNe 3.100 2.492 -0.608
CH3SO2NH2 methanesulfonamide rCN 1.207 1.718 0.511
S4 Sulfur tetramer rSS 2.155 2.617 0.462
C4H4N2 Succinonitrile rCC 1.561 1.103 -0.458
S4 Sulfur tetramer rSS 2.155 2.609 0.454
C4H6 1-Methylcyclopropene rCH 1.070 1.517 0.447
CH3CH2SH ethanethiol rCH 1.089 1.528 0.439
CH3CH2SH ethanethiol rCH 1.089 1.528 0.439
CH3CH2SH ethanethiol rCH 1.089 1.527 0.438
CH3CH2SH ethanethiol rCH 1.092 1.528 0.436
CH3CH2SH ethanethiol rCH 1.092 1.528 0.436
CH3CH2SH ethanethiol rCH 1.092 1.527 0.435
C2H4F2 1,2-difluoroethane rCH 1.093 1.524 0.431
C2H4F2 1,2-difluoroethane rCH 1.093 1.524 0.431
C4H4N2 Succinonitrile rCH 1.123 1.554 0.431
C4H10O Methyl propyl ether rCC 1.530 1.103 -0.427
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C4H6 1-Methylcyclopropene rCC 1.515 1.104 -0.411
Mg2 Magnesium diatomic rMgMg 3.891 3.499 -0.392
Mg2 Magnesium diatomic rMgMg 3.891 3.499 -0.392
Al2 Aluminum diatomic rAlAl 2.701 3.084 0.383
CH2CHCH2F Allyl Fluoride rHC 1.130 1.500 0.370
CH2CHCH2F Allyl Fluoride rHC 1.130 1.498 0.368
Ar2+ Argon diatomic cation rArAr 2.320 2.682 0.362
C4H4N2 Succinonitrile rCH 1.111 1.463 0.352
C3H3NO Isoxazole rCH 1.075 1.425 0.350
ONNO NO dimer rNN 2.236 1.899 -0.337
CH3CH2SH ethanethiol rCC 1.528 1.849 0.321
CH3CH2SH ethanethiol rCC 1.528 1.849 0.321
CH3CH2SH ethanethiol rCC 1.528 1.845 0.317
C4H10O Methyl propyl ether rCH 1.099 1.415 0.316
AlP Aluminum monophosphide rAlP 2.400 2.094 -0.306
AlP Aluminum monophosphide rAlP 2.400 2.094 -0.306
AlP Aluminum monophosphide rAlP 2.400 2.094 -0.306
Be2 Beryllium diatomic rBeBe 2.460 2.163 -0.297
CH3CH2SH ethanethiol rCS 1.820 1.527 -0.293
CH3CH2SH ethanethiol rCS 1.820 1.528 -0.292
CH3CH2SH ethanethiol rCS 1.820 1.528 -0.292
S4 Sulfur tetramer rSS 1.898 2.163 0.265
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.297 0.257
C2H2+ acetylene cation rCH 1.077 1.324 0.247
ClOOCl Dichlorine dioxide rOCl 1.704 1.944 0.240
Si2H2 disilyne rSiSi 2.215 1.993 -0.223
CaO Calcium monoxide rOCa 1.822 2.042 0.220
CaO Calcium monoxide rOCa 1.822 2.042 0.220
GaP Gallium monophosphide rPGa 2.450 2.231 -0.219
GaP Gallium monophosphide rPGa 2.450 2.231 -0.219
GaP Gallium monophosphide rPGa 2.450 2.231 -0.219
GaP Gallium monophosphide rPGa 2.450 2.231 -0.219
C4H6 1-Methylcyclopropene rCC 1.300 1.512 0.212
Cu2 Copper diatomic rCuCu 2.220 2.009 -0.211
B2 Boron diatomic rBB 1.590 1.384 -0.206
Al2 Aluminum diatomic rAlAl 2.701 2.497 -0.204
Al2 Aluminum diatomic rAlAl 2.701 2.497 -0.204
N2 Nitrogen diatomic rNN 1.098 1.299 0.201
N2 Nitrogen diatomic rNN 1.098 1.299 0.201
S3 Sulfur trimer rSS 1.917 2.114 0.197
Si2H2 disilyne rSiH 1.668 1.477 -0.191
ClF3 Chlorine trifluoride rFCl 1.597 1.776 0.179
ClF3 Chlorine trifluoride rFCl 1.597 1.776 0.179
Si2 Silicon diatomic rSiSi 2.246 2.071 -0.175
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.531 0.172
CaS Calcium sulfide rSCa 2.318 2.489 0.171
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.400 2.233 -0.167
AlP Aluminum monophosphide rAlP 2.260 2.094 -0.166
AlP Aluminum monophosphide rAlP 2.260 2.094 -0.166
AlP Aluminum monophosphide rAlP 2.260 2.094 -0.166
ClOOCl Dichlorine dioxide rOO 1.426 1.261 -0.165
Si2H2 disilyne rSiH 1.668 1.510 -0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.098 -0.142
CaC Calcium monocarbide rCCa 2.302 2.434 0.133
CaH Calcium monohydride rCaH 2.003 2.132 0.130
CaH Calcium monohydride rCaH 2.003 2.132 0.130
CaCl calcium monochloride rClCa 2.437 2.566 0.129
AlP Aluminum monophosphide rAlP 2.220 2.094 -0.126
AlP Aluminum monophosphide rAlP 2.220 2.094 -0.126
AlP Aluminum monophosphide rAlP 2.220 2.094 -0.126
GaP Gallium monophosphide rPGa 2.110 2.231 0.121
GaP Gallium monophosphide rPGa 2.110 2.231 0.121
GaP Gallium monophosphide rPGa 2.110 2.231 0.121
GaP Gallium monophosphide rPGa 2.110 2.231 0.121
Ne2+ Neon diatomic cation rNeNe 1.765 1.886 0.121
LiK Lithium Potassium rLiK 3.270 3.389 0.119
ClNO2 Nitryl chloride rNCl 1.840 1.954 0.114
ClFO3 Perchloryl fluoride rFCl 1.598 1.705 0.107
Ar2 Argon diatomic rArAr 3.758 3.863 0.105
CaBr Calcium monobromide rCaBr 2.594 2.696 0.102
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.703 0.100
K2 Potassium diatomic rKK 3.905 4.005 0.099
HClO4 perchloric acid rOCl 1.641 1.740 0.099
CuO Copper Monoxide rCuO 1.724 1.625 -0.099
AlN Aluminum nitride rNAl 1.786 1.688 -0.099
Si2H2 disilyne rSiSi 2.215 2.117 -0.098
CaOH Calcium monohydroxide rOCa 1.976 2.074 0.098
CO Carbon monoxide rCO 1.128 1.225 0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
N2 Nitrogen diatomic rNN 1.213 1.117 -0.096
He2+ helium diatomic cation rHeHe 1.081 1.176 0.095
He2+ helium diatomic cation rHeHe 1.081 1.176 0.095
ClS2 Sulfur chloride rSCl 2.071 2.161 0.090
CFCl chlorofluoromethylene rCCl 1.714 1.803 0.089
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.118 0.087
N2 Nitrogen diatomic rNN 1.213 1.299 0.086
N2 Nitrogen diatomic rNN 1.213 1.299 0.086
BrF5 bromine pentafluoride rFBr 1.689 1.773 0.084
CuF Copper monofluoride rCuF 1.745 1.661 -0.084
SOCl2 thionyl chloride rSCl 2.076 2.159 0.083
Si2H2 disilyne rSiSi 2.215 2.134 -0.082
ClF3 Chlorine trifluoride rFCl 1.597 1.677 0.080
ClF3 Chlorine trifluoride rFCl 1.597 1.677 0.080
C2 Carbon diatomic rCC 1.243 1.322 0.080
C2 Carbon diatomic rCC 1.243 1.322 0.080
ClF3 Chlorine trifluoride rFCl 1.697 1.776 0.079
ClF3 Chlorine trifluoride rFCl 1.697 1.776 0.079
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.618 0.079
Li2 Lithium diatomic rLiLi 2.673 2.751 0.078
Li2 Lithium diatomic rLiLi 2.673 2.750 0.077
Si2H2 disilyne rSiH 1.668 1.745 0.077
CaF Calcium monofluoride rFCa 1.967 2.044 0.077
CH3OCl methyl hypochlorite rOCl 1.674 1.751 0.077
SO2F2 Sulfuryl fluoride rFS 1.530 1.606 0.076
HClO4 perchloric acid rOCl 1.404 1.480 0.076
SiP Silicon monophosphide rSiP 2.078 2.003 -0.074
H2SO4 Sulfuric acid rSO 1.574 1.648 0.074
OClO Chlorine dioxide rClO 1.470 1.541 0.071
OClO Chlorine dioxide rClO 1.470 1.541 0.071
OClO Chlorine dioxide rClO 1.470 1.541 0.071
MgOH magnesium hydroxide rMgO 1.767 1.837 0.070
MgOH magnesium hydroxide rMgO 1.767 1.837 0.070
BrF3 Bromine trifluoride rFBr 1.721 1.791 0.070
C4H8O2 Ethyl acetate rCO 1.448 1.518 0.070
N2O3 Dinitrogen trioxide rNN 1.864 1.934 0.070
ClFO3 Perchloryl fluoride rClO 1.400 1.469 0.069
SF4 Sulfur tetrafluoride rSF 1.545 1.614 0.069
SF4 Sulfur tetrafluoride rSF 1.545 1.614 0.069
B4H10 Tetraborane(10) rHB 1.484 1.416 -0.068
NCl3 nitrogen trichloride rNCl 1.754 1.819 0.066
NCl3 nitrogen trichloride rNCl 1.754 1.819 0.066
N2O4 Dinitrogen tetroxide rNN 1.782 1.847 0.065
BHCl2 Borane, dichloro- rBH 1.130 1.194 0.064
SiC silicon monocarbide rCSi 1.722 1.658 -0.064
SiC silicon monocarbide rCSi 1.722 1.658 -0.064
KrF2 Krypton difluoride rFKr 1.875 1.939 0.064
N2O4 Dinitrogen tetroxide rNN 1.782 1.845 0.063
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.468 0.063
C2H2+ acetylene cation rCC 1.253 1.316 0.063
F2SO Thionyl Fluoride rFS 1.585 1.647 0.062
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.843 0.062
FSN Thiazyl fluoride rFS 1.643 1.704 0.061
HCO Formyl radical rCH 1.080 1.141 0.061
HCO Formyl radical rCH 1.080 1.141 0.061
KCl Potassium Chloride rKCl 2.667 2.727 0.060
HCO Formyl radical rCH 1.080 1.140 0.060
CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- rCCl 1.803 1.862 0.059
Si2 Silicon diatomic rSiSi 2.246 2.305 0.059
CHF2Cl difluorochloromethane rCCl 1.747 1.806 0.059
SFCl Sulfur chloride fluoride rSCl 1.994 2.052 0.058
CuCl Copper monochloride rCuCl 2.051 1.994 -0.058
CH2BrF Methane, bromofluoro- rCBr 1.915 1.972 0.057
B2 Boron diatomic rBB 1.590 1.647 0.057
HPO Hydrogen phosphorus oxide rPH 1.433 1.490 0.057
OPCl Phosphorus oxychloride rPCl 2.059 2.116 0.057
KOH Potassium hydroxide rOH 0.912 0.969 0.057
CH3NO3 Methyl nitrate rNO 1.402 1.458 0.056
BeCl2 Beryllium chloride rBeCl 1.750 1.806 0.056
Cl2+ chlorine diatomic cation rClCl 1.892 1.948 0.056
Cl2+ chlorine diatomic cation rClCl 1.892 1.948 0.056
NaOH sodium hydroxide rNaO 1.950 2.006 0.056
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.835 0.056
Cl3PO Phosphoryl chloride rPCl 1.989 2.044 0.055
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.525 -0.055
HClO4 perchloric acid rOCl 1.414 1.469 0.055
GeF4 Germanium tetrafluoride rFGe 1.670 1.725 0.055
PCl5 Phosphorus pentachloride rPCl 2.020 2.075 0.055
Cl2 Chlorine diatomic rClCl 1.988 2.043 0.055
Cl2 Chlorine diatomic rClCl 1.988 2.043 0.055
SF6 Sulfur Hexafluoride rSF 1.561 1.616 0.055
SF6 Sulfur Hexafluoride rSF 1.561 1.616 0.055
PF+ phosphorus monofluoride cation rFP 1.500 1.555 0.055
HN3 hydrogen azide rNH 0.975 1.029 0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.496 -0.054
GeF4 Germanium tetrafluoride rFGe 1.670 1.724 0.054
AsF5 Arsenic pentafluoride rAsF 1.656 1.710 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
HN3 hydrogen azide rNH 0.975 1.029 0.054
SO3 Sulfur trioxide rSO 1.418 1.471 0.054
SO3 Sulfur trioxide rSO 1.418 1.471 0.054
GeF+ Germanium monofluoride cation rFGe 1.665 1.719 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
CBrClF2 Methane, bromochlorodifluoro- rCCl 1.736 1.789 0.054
SeF4 Selenium tetrafluoride rFSe 1.682 1.736 0.054
PO- phosphorus monoxide anion rOP 1.540 1.594 0.054
SeO3 selenium trioxide rSeO 1.688 1.634 -0.053
SCl2 Sulfur dichloride rSCl 2.013 2.066 0.053
SCl2 Sulfur dichloride rSCl 2.013 2.066 0.053
SSO Disulfur monoxide rSS 1.884 1.937 0.053
SSO Disulfur monoxide rSS 1.884 1.937 0.053
CCl2 dichloromethylene rCCl 1.711 1.764 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.052
SO Sulfur monoxide rSO 1.481 1.534 0.052
SO Sulfur monoxide rSO 1.481 1.533 0.052
SO Sulfur monoxide rSO 1.481 1.533 0.052
SO Sulfur monoxide rSO 1.481 1.533 0.052
SO Sulfur monoxide rSO 1.481 1.533 0.052
C2H6O2S Dimethyl sulfone rSO 1.431 1.483 0.052
C2H6O2S Dimethyl sulfone rSO 1.431 1.483 0.052
PCl5 Phosphorus pentachloride rPCl 2.124 2.176 0.052
B2 Boron diatomic rBB 1.590 1.538 -0.052
B2 Boron diatomic rBB 1.590 1.538 -0.052
PCl3 Phosphorus trichloride rPCl 2.043 2.095 0.052
BrF5 bromine pentafluoride rFBr 1.774 1.826 0.052
CH3CH(CH3)ONO Isopropyl nitrite rON 1.414 1.465 0.051
Cl2O Dichlorine monoxide rClO 1.696 1.747 0.051
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
SO2 Sulfur dioxide rSO 1.432 1.483 0.051
SO2 Sulfur dioxide rSO 1.432 1.483 0.051
F3PO Phosphoryl fluoride rFP 1.524 1.575 0.051
SF2 sulfur difluoride rSF 1.587 1.638 0.051
SF2 sulfur difluoride rSF 1.587 1.638 0.051
ZnCN Zinc monocyanide rCZn 1.950 1.900 -0.050
251 molecules.