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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 PBEPBEultrafine/6-31G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.250 3.165
C4H6 1-Methylcyclopropene rCH 1.087 3.438 2.351
H2ONH3 Water Ammonia Dimer rNH 2.983 1.897 -1.086
H2ONH3 Water Ammonia Dimer rNH 2.983 1.899 -1.084
C4H6 1-Methylcyclopropene rCC 1.476 2.276 0.800
S4 Sulfur tetramer rSS 2.155 2.917 0.762
CH3CH2SH ethanethiol rCH 1.095 1.849 0.754
HSSSH trisulfane rHS 1.344 2.097 0.754
HSSSH trisulfane rHS 1.344 2.097 0.754
CH3CH2SH ethanethiol rCH 1.095 1.849 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 1.840 0.753
CH3CH2SH ethanethiol rCH 1.095 1.845 0.750
C4H6 1-Methylcyclopropene rCH 1.098 1.792 0.694
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
CH3SO2NH2 methanesulfonamide rCN 1.207 1.720 0.513
S4 Sulfur tetramer rSS 2.155 2.617 0.462
C4H4N2 Succinonitrile rCC 1.561 1.102 -0.459
C4H4N2 Succinonitrile rCC 1.561 1.104 -0.457
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 1.528 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 1.528 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 1.525 0.432
C2H4F2 1,2-difluoroethane rCH 1.093 1.525 0.432
C4H4N2 Succinonitrile rCH 1.123 1.554 0.431
C4H4N2 Succinonitrile rCH 1.123 1.551 0.429
C4H10O Methyl propyl ether rCC 1.530 1.105 -0.425
C2H4F2 1,2-difluoroethane rCH 1.093 1.513 0.420
C2H4F2 1,2-difluoroethane rCH 1.093 1.513 0.420
C4H6 1-Methylcyclopropene rCC 1.515 1.105 -0.410
Mg2 Magnesium diatomic rMgMg 3.891 3.500 -0.390
Mg2 Magnesium diatomic rMgMg 3.891 3.500 -0.390
CH2CHCH2F Allyl Fluoride rHC 1.130 1.500 0.370
CH2CHCH2F Allyl Fluoride rHC 1.130 1.498 0.368
GaP Gallium monophosphide rPGa 2.450 2.085 -0.365
GaP Gallium monophosphide rPGa 2.450 2.085 -0.365
GaP Gallium monophosphide rPGa 2.450 2.085 -0.365
GaP Gallium monophosphide rPGa 2.450 2.085 -0.365
Ar2+ Argon diatomic cation rArAr 2.320 2.681 0.361
C4H4N2 Succinonitrile rCH 1.111 1.469 0.358
C4H4N2 Succinonitrile rCH 1.111 1.464 0.353
C3H3NO Isoxazole rCH 1.075 1.425 0.350
CH3CH2SH ethanethiol rCC 1.528 1.849 0.321
CH3CH2SH ethanethiol rCC 1.528 1.849 0.321
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 1.414 0.315
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
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 1.947 0.242
Si2H2 disilyne rSiSi 2.215 1.992 -0.223
CaO Calcium monoxide rOCa 1.822 2.043 0.221
CaO Calcium monoxide rOCa 1.822 2.043 0.221
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 1.511 0.211
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 1.480 -0.188
He2+ helium diatomic cation rHeHe 1.081 1.268 0.188
ClF3 Chlorine trifluoride rFCl 1.597 1.776 0.179
ClF3 Chlorine trifluoride rFCl 1.597 1.776 0.179
CaS Calcium sulfide rSCa 2.318 2.490 0.172
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.531 0.172
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
ClOOCl Dichlorine dioxide rOO 1.426 1.260 -0.166
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
GaP Gallium monophosphide rPGa 2.250 2.085 -0.165
GaP Gallium monophosphide rPGa 2.250 2.085 -0.165
GaP Gallium monophosphide rPGa 2.250 2.085 -0.165
GaP Gallium monophosphide rPGa 2.250 2.085 -0.165
Si2H2 disilyne rSiH 1.668 1.512 -0.156
GaP Gallium monophosphide rPGa 2.240 2.085 -0.155
GaP Gallium monophosphide rPGa 2.240 2.085 -0.155
GaP Gallium monophosphide rPGa 2.240 2.085 -0.155
GaP Gallium monophosphide rPGa 2.240 2.085 -0.155
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.098 -0.142
CaC Calcium monocarbide rCCa 2.302 2.435 0.134
CaH Calcium monohydride rCaH 2.003 2.134 0.132
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
Ar2 Argon diatomic rArAr 3.758 3.878 0.120
Ne2+ Neon diatomic cation rNeNe 1.765 1.878 0.113
ClNO2 Nitryl chloride rNCl 1.840 1.953 0.113
ClNO2 Nitryl chloride rNCl 1.840 1.952 0.112
ClFO3 Perchloryl fluoride rFCl 1.598 1.705 0.107
ClFO3 Perchloryl fluoride rFCl 1.598 1.705 0.107
CaBr Calcium monobromide rCaBr 2.594 2.696 0.102
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.703 0.100
CuO Copper Monoxide rCuO 1.724 1.625 -0.099
Si2H2 disilyne rSiSi 2.215 2.118 -0.098
K2 Potassium diatomic rKK 3.905 4.002 0.097
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
ClS2 Sulfur chloride rSCl 2.071 2.161 0.090
ClS2 Sulfur chloride rSCl 2.071 2.161 0.090
Si2H2 disilyne rSiH 1.668 1.757 0.089
CFCl chlorofluoromethylene rCCl 1.714 1.802 0.088
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.117 0.087
N2 Nitrogen diatomic rNN 1.213 1.299 0.086
N2 Nitrogen diatomic rNN 1.213 1.299 0.086
ClSSCl Disulfur dichloride rSCl 2.057 2.141 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 2.133 -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
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 2.751 0.078
H2SO4 Sulfuric acid rSO 1.574 1.650 0.076
H2SO4 Sulfuric acid rSO 1.574 1.650 0.076
MgOH magnesium hydroxide rMgO 1.767 1.840 0.073
MgOH magnesium hydroxide rMgO 1.767 1.840 0.073
BrF3 Bromine trifluoride rFBr 1.721 1.792 0.071
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
OClO Chlorine dioxide rClO 1.470 1.541 0.071
N2O3 Dinitrogen trioxide rNN 1.864 1.935 0.071
C4H8O2 Ethyl acetate rCO 1.448 1.519 0.071
BrF3 Bromine trifluoride rFBr 1.721 1.791 0.070
ClFO3 Perchloryl fluoride rClO 1.400 1.469 0.069
ClFO3 Perchloryl fluoride rClO 1.400 1.469 0.069
N2O3 Dinitrogen trioxide rNN 1.864 1.933 0.069
SF4 Sulfur tetrafluoride rSF 1.545 1.614 0.069
SF4 Sulfur tetrafluoride rSF 1.545 1.614 0.069
SF4 Sulfur tetrafluoride rSF 1.545 1.614 0.069
BHCl2 Borane, dichloro- rBH 1.130 1.196 0.066
BHCl2 Borane, dichloro- rBH 1.130 1.196 0.066
NCl3 nitrogen trichloride rNCl 1.754 1.819 0.066
KrF2 Krypton difluoride rFKr 1.875 1.940 0.065
N2O4 Dinitrogen tetroxide rNN 1.782 1.846 0.064
N2O4 Dinitrogen tetroxide rNN 1.782 1.846 0.064
SiC silicon monocarbide rCSi 1.722 1.658 -0.064
B4H10 Tetraborane(10) rHB 1.484 1.420 -0.064
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.468 0.063
F2SO Thionyl Fluoride rFS 1.585 1.647 0.062
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.842 0.061
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
C2H2+ acetylene cation rCC 1.253 1.313 0.060
HCO Formyl radical rCH 1.080 1.140 0.060
KOH Potassium hydroxide rOH 0.912 0.972 0.060
HCO Formyl radical rCH 1.080 1.139 0.059
Si2 Silicon diatomic rSiSi 2.246 2.305 0.059
CH2BrF Methane, bromofluoro- rCBr 1.915 1.974 0.059
KCl Potassium Chloride rKCl 2.667 2.726 0.059
CHF2Cl difluorochloromethane rCCl 1.747 1.806 0.059
SFCl Sulfur chloride fluoride rSCl 1.994 2.052 0.058
CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- rCCl 1.803 1.861 0.058
CuCl Copper monochloride rCuCl 2.051 1.993 -0.058
HPO Hydrogen phosphorus oxide rPH 1.433 1.490 0.057
B2 Boron diatomic rBB 1.590 1.647 0.057
OPCl Phosphorus oxychloride rPCl 2.059 2.116 0.057
BeCl2 Beryllium chloride rBeCl 1.750 1.806 0.056
CH3NO3 Methyl nitrate rNO 1.402 1.458 0.056
CH3NO3 Methyl nitrate rNO 1.402 1.458 0.056
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.834 0.056
Cl3PO Phosphoryl chloride rPCl 1.989 2.045 0.056
Cl3PO Phosphoryl chloride rPCl 1.989 2.045 0.056
HPO Hydrogen phosphorus oxide rPH 1.433 1.489 0.056
NaOH sodium hydroxide rNaO 1.950 2.005 0.055
HN3 hydrogen azide rNH 0.975 1.030 0.055
SF6 Sulfur Hexafluoride rSF 1.561 1.616 0.055
SF6 Sulfur Hexafluoride rSF 1.561 1.616 0.055
PCl5 Phosphorus pentachloride rPCl 2.020 2.075 0.055
PCl5 Phosphorus pentachloride rPCl 2.020 2.075 0.055
GeF4 Germanium tetrafluoride rFGe 1.670 1.725 0.055
Cl2+ chlorine diatomic cation rClCl 1.892 1.946 0.055
HN3 hydrogen azide rNH 0.975 1.030 0.055
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.525 -0.055
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.526 -0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
SO3 Sulfur trioxide rSO 1.418 1.472 0.054
SO3 Sulfur trioxide rSO 1.418 1.471 0.054
SO3 Sulfur trioxide rSO 1.418 1.471 0.054
SeF4 Selenium tetrafluoride rFSe 1.682 1.736 0.054
Cl2 Chlorine diatomic rClCl 1.988 2.041 0.054
Cl2 Chlorine diatomic rClCl 1.988 2.041 0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.496 -0.054
SeO3 selenium trioxide rSeO 1.688 1.634 -0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
SCl2 Sulfur dichloride rSCl 2.013 2.066 0.053
SSO Disulfur monoxide rSS 1.884 1.937 0.053
HN3 hydrogen azide rNH 0.975 1.028 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
CCl2 dichloromethylene rCCl 1.711 1.764 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.053
SO Sulfur monoxide rSO 1.481 1.534 0.052
SO Sulfur monoxide rSO 1.481 1.534 0.052
GeF+ Germanium monofluoride cation rFGe 1.665 1.718 0.052
PCl3 Phosphorus trichloride rPCl 2.043 2.095 0.052
PCl3 Phosphorus trichloride rPCl 2.043 2.095 0.052
B2 Boron diatomic rBB 1.590 1.538 -0.052
C2H6O2S Dimethyl sulfone rSO 1.431 1.483 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
PCl5 Phosphorus pentachloride rPCl 2.124 2.176 0.052
Cl2O Dichlorine monoxide rClO 1.696 1.747 0.052
Cl2O Dichlorine monoxide rClO 1.696 1.747 0.052
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
CH3CH(CH3)ONO Isopropyl nitrite rON 1.414 1.465 0.051
SO2 Sulfur dioxide rSO 1.432 1.483 0.051
SO2 Sulfur dioxide rSO 1.432 1.483 0.051
SO2 Sulfur dioxide rSO 1.432 1.483 0.051
SF2 sulfur difluoride rSF 1.587 1.638 0.051
SF2 sulfur difluoride rSF 1.587 1.638 0.051
SF2 sulfur difluoride rSF 1.587 1.638 0.051
F3PO Phosphoryl fluoride rFP 1.524 1.575 0.051
F3PO Phosphoryl fluoride rFP 1.524 1.574 0.050
CH3CHNOH Acetaldoxime rCC 1.550 1.500 -0.050
269 molecules.