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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 B97D3/6-31G

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.241 3.156
C4H6 1-Methylcyclopropene rCH 1.087 3.448 2.361
S4 Sulfur tetramer rSS 2.155 3.171 1.016
CH3CH2SH ethanethiol rCH 1.095 1.926 0.831
CH3CH2SH ethanethiol rCH 1.095 1.921 0.826
C4H6 1-Methylcyclopropene rCC 1.476 2.284 0.808
C4H6 1-Methylcyclopropene rCH 1.087 1.832 0.745
C4H6 1-Methylcyclopropene rCH 1.098 1.786 0.688
CH3SO2NH2 methanesulfonamide rCN 1.207 1.888 0.681
C4H6 1-Methylcyclopropene rCH 1.098 1.768 0.670
S4 Sulfur tetramer rSS 2.155 2.797 0.642
S4 Sulfur tetramer rSS 2.155 2.797 0.642
C4H6 1-Methylcyclopropene rCH 1.070 1.531 0.461
S4 Sulfur tetramer rSS 1.898 2.350 0.452
CH3CH2SH ethanethiol rCH 1.089 1.529 0.440
CH3CH2SH ethanethiol rCH 1.089 1.529 0.440
CH3CH2SH ethanethiol rCH 1.092 1.529 0.437
CH3CH2SH ethanethiol rCH 1.092 1.529 0.437
C2H4F2 1,2-difluoroethane rCH 1.093 1.524 0.431
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C4H6 1-Methylcyclopropene rCC 1.515 1.097 -0.418
S3 Sulfur trimer rSS 1.917 2.319 0.402
CH3CH2SH ethanethiol rCC 1.528 1.926 0.398
CH3CH2SH ethanethiol rCC 1.528 1.921 0.393
CH2CHCH2F Allyl Fluoride rHC 1.130 1.502 0.372
CH2CHCH2F Allyl Fluoride rHC 1.130 1.497 0.367
C3H3NO Isoxazole rCH 1.075 1.433 0.358
CaO Calcium monoxide rOCa 1.822 2.144 0.322
CaS Calcium sulfide rSCa 2.318 2.639 0.321
CH3CH2SH ethanethiol rCS 1.820 1.529 -0.291
CH3CH2SH ethanethiol rCS 1.820 1.529 -0.291
C2H2+ acetylene cation rCH 1.077 1.356 0.280
OClO Chlorine dioxide rClO 1.470 1.746 0.277
Cl2+ chlorine diatomic cation rClCl 1.892 2.147 0.255
CaBr Calcium monobromide rCaBr 2.594 2.844 0.250
SFCl Sulfur chloride fluoride rSCl 1.994 2.238 0.244
OPCl Phosphorus oxychloride rPCl 2.059 2.298 0.240
CaC Calcium monocarbide rCCa 2.302 2.540 0.238
Si2H2 disilyne rSiH 1.668 1.905 0.237
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.268 0.230
SSO Disulfur monoxide rSS 1.884 2.114 0.230
C4H6 1-Methylcyclopropene rCC 1.300 1.529 0.229
FSN Thiazyl fluoride rFS 1.643 1.872 0.229
H2S2 Disulfane rSS 2.056 2.277 0.220
C2H6O2S Dimethyl sulfone rSO 1.431 1.645 0.214
SF4 Sulfur tetrafluoride rSF 1.545 1.758 0.213
SO3 Sulfur trioxide rSO 1.418 1.631 0.213
BrCl Bromine monochloride rClBr 2.136 2.347 0.211
S3 Sulfur trimer rSS 1.917 2.125 0.208
He2+ helium diatomic cation rHeHe 1.081 1.288 0.207
S2N2 Disulfur dinitride rNS 1.642 1.846 0.204
CFCl chlorofluoromethylene rCCl 1.714 1.916 0.202
SO2 Sulfur dioxide rSO 1.432 1.632 0.200
SF6 Sulfur Hexafluoride rSF 1.561 1.759 0.198
Br2 Bromine diatomic rBrBr 2.281 2.477 0.196
Si2H2 disilyne rSiSi 2.215 2.022 -0.194
NCl nitrogen monochloride rNCl 1.611 1.804 0.193
SSO Disulfur monoxide rSO 1.456 1.649 0.193
CH3SOCH3 Dimethyl sulfoxide rSO 1.485 1.676 0.191
HSiCl Chlorosilylene rSiCl 2.067 2.257 0.190
Si2H2 disilyne rSiH 1.668 1.479 -0.189
S2 Sulfur diatomic rSS 1.889 2.077 0.188
NCl3 nitrogen trichloride rNCl 1.754 1.940 0.187
SiCl Clorosilylidyne rSiCl 2.061 2.247 0.186
SeCl2 Selenium Dichloride rClSe 2.157 2.340 0.183
HOSH hydrogen thioperoxide rSO 1.662 1.839 0.178
SO Sulfur monoxide rSO 1.481 1.657 0.176
SO Sulfur monoxide rSO 1.481 1.657 0.176
SO Sulfur monoxide rSO 1.481 1.657 0.176
SO Sulfur monoxide rSO 1.481 1.657 0.176
S4 Sulfur tetramer rSS 1.898 2.073 0.175
S4 Sulfur tetramer rSS 1.898 2.073 0.175
ClO Monochlorine monoxide rClO 1.596 1.769 0.173
SF2 sulfur difluoride rSF 1.587 1.760 0.172
SF4 Sulfur tetrafluoride rSF 1.646 1.817 0.171
NHCl2 dichloroamine rNCl 1.760 1.926 0.166
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.942 0.163
HOCl hypochlorous acid rClO 1.697 1.860 0.163
SFCl Sulfur chloride fluoride rFS 1.606 1.766 0.160
PF5 Phosphorus pentafluoride rPF 1.534 1.692 0.158
ClF Chlorine monofluoride rFCl 1.628 1.786 0.158
SiH3Cl chlorosilane rSiCl 2.051 2.208 0.158
BrO Bromine monoxide rOBr 1.718 1.875 0.157
SF Monosulfur monofluoride rSF 1.599 1.756 0.157
SO Sulfur monoxide rOS 1.500 1.657 0.157
SO Sulfur monoxide rOS 1.500 1.657 0.157
SO Sulfur monoxide rOS 1.500 1.657 0.157
SO Sulfur monoxide rOS 1.500 1.657 0.157
PF2 Phosphorus difluoride rPF 1.579 1.735 0.155
SO+ sulfur monoxide cation rOS 1.424 1.579 0.155
SiBr Silicon monobromide rSiBr 2.209 2.363 0.154
CaBr2 Calcium dibromide rCaBr 2.616 2.768 0.152
Ar2 Argon diatomic rArAr 3.758 3.909 0.151
C2H6O2S Dimethyl sulfone rCS 1.777 1.924 0.147
CH3CHClCH3 Propane, 2-chloro- rCCl 1.798 1.944 0.146
PS phosphorus sulfide rPS 1.900 2.046 0.146
SiBr+ Silicon monobromide cation rSiBr 2.095 2.240 0.145
Si2H2 disilyne rSiH 1.668 1.523 -0.145
As4 Arsenic tetramer rAsAs 2.435 2.579 0.144
GeCl Germanium monochloride rClGe 2.164 2.307 0.143
CH3SOCH3 Dimethyl sulfoxide rCS 1.799 1.942 0.143
N2O4 Dinitrogen tetroxide rNN 1.782 1.924 0.142
BrO+ Bromine monoxide cation rOBr 1.635 1.777 0.142
HSiBr monobromosilylene rSiBr 2.237 2.375 0.138
N2 Nitrogen diatomic rNN 1.098 1.235 0.138
N2 Nitrogen diatomic rNN 1.098 1.235 0.138
PO Phosphorus monoxide rPO 1.476 1.613 0.137
ClNO Nitrosyl chloride rNCl 1.975 2.111 0.136
NH2SH Thiohydroxylamine rNS 1.705 1.841 0.136
NH2SH Thiohydroxylamine rNS 1.705 1.841 0.136
NH2SH Thiohydroxylamine rNS 1.705 1.840 0.135
NH2SH Thiohydroxylamine rNS 1.705 1.840 0.135
CBr Carbon monobromide rCBr 1.821 1.955 0.134
PF5 Phosphorus pentafluoride rFP 1.577 1.709 0.132
SeF4 Selenium tetrafluoride rFSe 1.682 1.814 0.132
Se2 Selenium diatomic rSeSe 2.166 2.298 0.132
SiF2 Silicon difluoride rFSi 1.590 1.720 0.130
Si2H2 disilyne rSiSi 2.215 2.343 0.128
OPCl Phosphorus oxychloride rPO 1.462 1.589 0.127
BrF Bromine monofluoride rFBr 1.759 1.883 0.124
AlBr Aluminum monobromide rAlBr 2.295 2.419 0.124
SiH2F2 difluorosilane rSiF 1.576 1.699 0.123
C2H4S Thiirane rCS 1.815 1.937 0.122
SiH3F monofluorosilane rSiF 1.595 1.716 0.122
NH2SH Thiohydroxylamine rNS 1.719 1.841 0.122
NH2SH Thiohydroxylamine rNS 1.719 1.841 0.122
NH2SH Thiohydroxylamine rNS 1.719 1.840 0.121
NH2SH Thiohydroxylamine rNS 1.719 1.840 0.121
GeCl2 Germanium dichloride rClGe 2.186 2.307 0.121
SiS silicon monosulfide rSiS 1.929 2.050 0.121
CHFClBr fluorochlorobromomethane rCCl 1.745 1.864 0.119
CHFClBr fluorochlorobromomethane rCCl 1.745 1.864 0.119
SiHF3 trifluorosilane rSiF 1.563 1.681 0.119
FSN Thiazyl fluoride rNS 1.448 1.567 0.119
CH2BrF Methane, bromofluoro- rCBr 1.915 2.033 0.118
ClCOClCO Oxalyl chloride rCCl 1.744 1.862 0.118
GaCl Gallium monochloride rClGa 2.202 2.318 0.116
CH3CCl2CH3 Propane, 2,2-dichloro- rCCl 1.799 1.914 0.115
SeO Selenium monoxide rSeO 1.639 1.752 0.113
CH2CClCHCH2 1,3-Butadiene, 2-chloro- rCCl 1.742 1.855 0.113
SiH3Br bromosilane rSiBr 2.210 2.321 0.111
SeO2 Selenium dioxide rSeO 1.607 1.718 0.111
CF2Cl2 difluorodichloromethane rCCl 1.744 1.855 0.111
HNO3 Nitric acid rNO 1.406 1.517 0.111
NF3 Nitrogen trifluoride rNF 1.365 1.475 0.110
SiC2 Silicon dicarbide rCSi 1.836 1.946 0.110
KH Potassium hydride rKH 2.243 2.352 0.109
CH2BrCl Methane, bromochloro- rCCl 1.755 1.864 0.109
C2H2ClF 1-chloro-1-fluoroethylene rCCl 1.704 1.811 0.107
BH3PH3 borane phosphine rBP 1.937 2.043 0.106
CH3CH2SH ethanethiol rCS 1.820 1.926 0.106
CH3Cl Methyl chloride rCCl 1.785 1.889 0.104
CH3Cl Methyl chloride rCCl 1.785 1.889 0.103
FNO2 Nitryl fluoride rNF 1.467 1.570 0.103
CH3CH2SH ethanethiol rCS 1.820 1.921 0.101
C6H4Cl2 1,4-dichlorobenzene rCCl 1.729 1.830 0.101
CH2Cl chloromethyl radical rCCl 1.691 1.792 0.101
CH2Cl chloromethyl radical rCCl 1.691 1.792 0.101
CH2Cl chloromethyl radical rCCl 1.691 1.791 0.100
CH2Cl chloromethyl radical rCCl 1.691 1.791 0.100
SiO Silicon monoxide rSiO 1.510 1.610 0.100
NaLi lithium sodium rLiNa 2.889 2.988 0.099
F2+ flourine diatomic cation rFF 1.322 1.420 0.098
Si2H2 disilyne rSiH 1.668 1.766 0.098
CH2Cl2 Methylene chloride rCCl 1.767 1.865 0.098
LiCl lithium chloride rLiCl 2.021 2.118 0.097
CF3Cl Methane, chlorotrifluoro- rCCl 1.752 1.849 0.097
C2H5Br Ethyl bromide rCBr 1.950 2.046 0.096
SiBr4 Silicon tetrabromide rSiBr 2.183 2.278 0.095
CHCl3 Chloroform rCCl 1.762 1.856 0.094
SeF4 Selenium tetrafluoride rFSe 1.771 1.865 0.094
CCl4 Carbon tetrachloride rCCl 1.767 1.861 0.094
CH3SCH3 Dimethyl sulfide rCS 1.802 1.896 0.094
C3H6S3 1,3,5-Trithiane rCS 1.801 1.895 0.094
FNO Nitrosyl fluoride rNF 1.512 1.605 0.093
GaAs Gallium arsenide rGaAs 2.530 2.622 0.092
AlF Aluminum monofluoride rAlF 1.654 1.746 0.092
CH2CHCH2F Allyl Fluoride rCF 1.370 1.460 0.090
CH2CHCH2F Allyl Fluoride rCF 1.370 1.460 0.090
CF2 Difluoromethylene rCF 1.297 1.387 0.090
CH3Br methyl bromide rCBr 1.934 2.024 0.090
CH3SH Methanethiol rCS 1.818 1.907 0.089
CH3SH Methanethiol rCS 1.818 1.907 0.089
NHF2 difluoramine rNF 1.400 1.488 0.088
Na2 Sodium diatomic rNaNa 3.079 3.166 0.088
C2H2N2O Furazan rNO 1.373 1.459 0.086
CF Fluoromethylidyne rCF 1.276 1.362 0.086
N2 Nitrogen diatomic rNN 1.213 1.127 -0.086
N2 Nitrogen diatomic rNN 1.213 1.127 -0.086
N2 Nitrogen diatomic rNN 1.213 1.127 -0.086
N2 Nitrogen diatomic rNN 1.213 1.127 -0.086
GeF+ Germanium monofluoride cation rFGe 1.665 1.750 0.084
NSe Nitrogen monoselenide rNSe 1.652 1.736 0.084
SiSe Silicon Monoselenide rSiSe 2.058 2.142 0.084
O2- oxygen diatomic anion rOO 1.350 1.432 0.082
H2O2 Hydrogen peroxide rOO 1.475 1.557 0.082
H2O2 Hydrogen peroxide rOO 1.475 1.556 0.081
H2O2 Hydrogen peroxide rOO 1.475 1.556 0.081
CH3SSH Hydrogen methyl disulfide rCS 1.823 1.904 0.081
KOH Potassium hydroxide rOK 2.212 2.292 0.080
GaBr Gallium monobromide rGaBr 2.352 2.431 0.078
CH2CHCH2F Allyl Fluoride rCF 1.382 1.460 0.078
CH2CHCH2F Allyl Fluoride rCF 1.382 1.460 0.078
PN Phosphorus mononitride rPN 1.491 1.569 0.078
C2H2+ acetylene cation rCC 1.253 1.331 0.078
MgH magnesium monohydride rMgH 1.730 1.807 0.078
CH2CHCH2F Allyl Fluoride rCF 1.370 1.448 0.078
CH2CHCH2F Allyl Fluoride rCF 1.370 1.448 0.078
HOF Hypofluorous acid rFO 1.442 1.519 0.077
CHFClBr fluorochlorobromomethane rCBr 1.928 2.004 0.076
CHFClBr fluorochlorobromomethane rCBr 1.928 2.004 0.076
CH2Br2 dibromomethane rCBr 1.925 2.001 0.076
C2H4O Ethylene oxide rCO 1.425 1.500 0.075
CH2BrCl Methane, bromochloro- rCBr 1.928 2.003 0.075
CHSNH2 thioformamide rCS 1.626 1.700 0.074
NO- nitric oxide anion rNO 1.258 1.332 0.074
GeF4 Germanium tetrafluoride rFGe 1.670 1.743 0.073
C4H8O2 Ethyl acetate rCO 1.448 1.521 0.073
CH2ClCCCl 1,3-dichloropropyne rCCl 1.638 1.710 0.073
HNCS Isothiocyanic acid rCS 1.567 1.639 0.072
F2 Fluorine diatomic rFF 1.412 1.483 0.071
CH3CHS Thioacetaldehyde rCS 1.610 1.681 0.071
HCF Fluoromethylene rCF 1.305 1.376 0.071
GaAs Gallium arsenide rGaAs 2.530 2.601 0.071
CH3CSNH2 Ethanethioamide rCS 1.647 1.716 0.069
CF3Br Bromotrifluoromethane rCBr 1.923 1.992 0.068
O3 Ozone rOO 1.278 1.346 0.068
CH3SeCH3 dimethylselenide rCSe 1.943 2.011 0.068
GeF Germanium monofluoride rFGe 1.745 1.812 0.067
CF2O Carbonic difluoride rCF 1.312 1.379 0.067
SiH Silylidyne rSiH 1.520 1.586 0.066
HNCS Isothiocyanic acid rCS 1.567 1.632 0.066
KOH Potassium hydroxide rOH 0.912 0.978 0.066
CH2CHCH2F Allyl Fluoride rCF 1.382 1.448 0.066
CH2CHCH2F Allyl Fluoride rCF 1.382 1.448 0.066
CH2CS Thioketene rCS 1.554 1.619 0.065
CHF3 Methane, trifluoro- rCF 1.328 1.393 0.065
CH2F2 Methane, difluoro- rCF 1.351 1.416 0.065
O2 Oxygen diatomic rOO 1.208 1.272 0.064
CH3CHF2 Ethane, 1,1-difluoro- rCF 1.364 1.427 0.063
CH3CH2SH ethanethiol rSH 1.322 1.385 0.063
CH3CH2SH ethanethiol rSH 1.322 1.385 0.063
CH3CH2SH ethanethiol rSH 1.322 1.385 0.063
CH3CH2SH ethanethiol rSH 1.322 1.385 0.063
GeH3F monofluorogermane rGeF 1.731 1.794 0.063
BClF2 Chlorodifluoroborane rBCl 1.728 1.790 0.062
NH2OH hydroxylamine rNO 1.453 1.515 0.062
NH2OH hydroxylamine rNO 1.453 1.515 0.062
C3H2O3 vinylene carbonate rCO 1.364 1.426 0.062
C4H4Se selenophene rCSe 1.855 1.916 0.061
PH phosphorus monohydride rPH 1.418 1.479 0.061
GeO Germanium monoxide rOGe 1.625 1.685 0.061
GeO Germanium monoxide rOGe 1.625 1.685 0.061
Si2H2 disilyne rSiSi 2.215 2.156 -0.060
H2CS Thioformaldehyde rCS 1.611 1.670 0.059
CBr4 Carbon tetrabromide rCBr 1.942 2.001 0.059
C2H4F2 1,2-difluoroethane rCF 1.390 1.449 0.059
C2H4F2 1,2-difluoroethane rCF 1.390 1.449 0.059
PH phosphorus monohydride rPH 1.420 1.479 0.059
HSiBr monobromosilylene rSiH 1.518 1.577 0.059
AlNC Aluminum isocyanide rAlN 1.855 1.913 0.059
CH3F Methyl fluoride rCF 1.383 1.441 0.058
CH3F Methyl fluoride rCF 1.383 1.441 0.058
OCS Carbonyl sulfide rCS 1.560 1.618 0.058
HS- mercapto anion rSH 1.343 1.401 0.057
F2CCCF2 tetrafluoroallene rCF 1.320 1.377 0.057
CHOOCHO diformyl ether rCO 1.364 1.421 0.057
C2H4O4 Formic acid dimer rCO 1.217 1.274 0.057
PH phosphorus monohydride rPH 1.422 1.479 0.057
BH3NH3 borane ammonia rBN 1.645 1.702 0.056
CF3Br Bromotrifluoromethane rCF 1.327 1.383 0.056
CH2FCH2CH3 1-Fluoropropane rCF 1.401 1.457 0.056
GeSe Germanium monoselenide rGeSe 2.135 2.190 0.056
CF3Cl Methane, chlorotrifluoro- rCF 1.325 1.380 0.055
CH3SH Methanethiol rSH 1.329 1.384 0.055
GeBr4 Germanium tetrabromide rGeBr 2.272 2.327 0.055
CH3SH Methanethiol rSH 1.329 1.384 0.055
HN3 hydrogen azide rNH 0.975 1.030 0.055
C3O2 Carbon suboxide rCO 1.146 1.201 0.055
C2H4F2 1,2-difluoroethane rCF 1.390 1.445 0.055
C2H4F2 1,2-difluoroethane rCF 1.390 1.445 0.055
CSe Carbon monoselenide rCSe 1.676 1.731 0.054
SCSe Carbon sulfide selenide rCS 1.553 1.607 0.054
CH2CHF Ethene, fluoro- rCF 1.347 1.401 0.054
CS2 Carbon disulfide rCS 1.554 1.608 0.054
Si2H6 disilane rSiSi 2.320 2.372 0.052
HSiCl Chlorosilylene rSiH 1.525 1.577 0.052
CH2FCH2CH3 1-Fluoropropane rCF 1.401 1.453 0.052
CFCl chlorofluoromethylene rCF 1.320 1.371 0.051
CH3SSH Hydrogen methyl disulfide rHS 1.339 1.390 0.051
OH- hydroxide anion rOH 0.964 1.015 0.051
BCl3 Borane, trichloro- rBCl 1.742 1.793 0.051
HOSH hydrogen thioperoxide rSH 1.342 1.392 0.050
GaH Gallium monohydride rGaH 1.663 1.713 0.050
C2H3NO Nitrosoethylene rNO 1.220 1.270 0.050
295 molecules.