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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 B97D3/6-31+G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.240 3.155
C4H6 1-Methylcyclopropene rCH 1.087 3.429 2.342
H2SO4 Sulfuric acid rOH 0.970 2.849 1.879
C4H8S Thiophene, tetrahydro- rCC 1.532 3.319 1.787
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.444 1.327
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
H2ONH3 Water Ammonia Dimer rNH 2.983 2.057 -0.926
CH2BrCl Methane, bromochloro- rCBr 1.928 1.090 -0.838
C4H6 1-Methylcyclopropene rCC 1.476 2.270 0.794
S4 Sulfur tetramer rSS 2.155 2.937 0.782
HSSSH trisulfane rHS 1.344 2.105 0.761
HSSSH trisulfane rHS 1.344 2.105 0.761
HSSSH trisulfane rHS 1.344 2.103 0.760
HSSSH trisulfane rHS 1.344 2.103 0.760
CH3CH2SH ethanethiol rCH 1.095 1.854 0.759
CH3CH2SH ethanethiol rCH 1.095 1.849 0.754
C4H6 1-Methylcyclopropene rCH 1.087 1.836 0.749
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.188 0.742
C4H8S Thiophene, tetrahydro- rCH 1.117 1.850 0.733
C4H6 1-Methylcyclopropene rCH 1.098 1.788 0.690
Na2Cl2 Disodium dichloride rNaCl 2.584 3.266 0.682
CH2BrCl Methane, bromochloro- rHC 1.115 1.787 0.672
C4H6 1-Methylcyclopropene rCH 1.098 1.767 0.669
CH2BrCl Methane, bromochloro- rCCl 1.755 1.090 -0.665
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
CH3SO2NH2 methanesulfonamide rCN 1.207 1.719 0.512
S4 Sulfur tetramer rSS 2.155 2.658 0.503
Li2 Lithium diatomic rLiLi 2.673 3.159 0.486
C4H4N2 Succinonitrile rCC 1.561 1.098 -0.463
C4H6 1-Methylcyclopropene rCH 1.070 1.512 0.442
CH3CH2SH ethanethiol rCH 1.089 1.530 0.441
CH3CH2SH ethanethiol rCH 1.089 1.529 0.440
CH3CH2SH ethanethiol rCH 1.092 1.530 0.438
CH3CH2SH ethanethiol rCH 1.092 1.529 0.437
C2H4F2 1,2-difluoroethane rCH 1.093 1.528 0.435
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.482 0.434
C2H4F2 1,2-difluoroethane rCH 1.093 1.527 0.434
C4H4N2 Succinonitrile rCH 1.123 1.556 0.433
C4H10O Methyl propyl ether rCC 1.530 1.100 -0.430
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 1.100 -0.415
CH2CHCH2F Allyl Fluoride rHC 1.130 1.500 0.370
CH2CHCH2F Allyl Fluoride rHC 1.130 1.497 0.367
Ar2 Argon diatomic rArAr 3.758 4.115 0.357
C4H4N2 Succinonitrile rCH 1.111 1.466 0.355
C3H3NO Isoxazole rCH 1.075 1.427 0.352
C4H8S Thiophene, tetrahydro- rCS 1.835 2.172 0.337
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.666 0.326
CH3CH2SH ethanethiol rCC 1.528 1.854 0.326
C4H10O Methyl propyl ether rCH 1.099 1.420 0.321
CH3CH2SH ethanethiol rCC 1.528 1.849 0.321
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
CH3CH2SH ethanethiol rCS 1.820 1.529 -0.291
CH3CH2SH ethanethiol rCS 1.820 1.530 -0.290
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
SeO3 selenium trioxide rSeO 1.688 1.973 0.285
ZnS Zinc sulfide rSZn 2.046 2.326 0.279
S4 Sulfur tetramer rSS 1.898 2.173 0.275
S4 Sulfur tetramer rSS 2.155 2.426 0.271
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.300 0.260
C2H2+ acetylene cation rCH 1.077 1.320 0.243
ONNO NO dimer rNN 2.236 1.994 -0.242
CaO Calcium monoxide rOCa 1.822 2.061 0.239
CaO Calcium monoxide rOCa 1.822 2.060 0.238
Si2H2 disilyne rSiSi 2.215 1.987 -0.228
C4H6 1-Methylcyclopropene rCC 1.300 1.512 0.212
AsF5 Arsenic pentafluoride rAsF 1.711 1.922 0.211
B2F4 Diboron tetrafluoride rBB 1.720 1.511 -0.209
GaAs Gallium arsenide rGaAs 2.530 2.323 -0.207
S3 Sulfur trimer rSS 1.917 2.121 0.204
ClF3 Chlorine trifluoride rFCl 1.597 1.795 0.199
ClF3 Chlorine trifluoride rFCl 1.597 1.795 0.199
Si2H2 disilyne rSiH 1.668 1.470 -0.198
CaS Calcium sulfide rSCa 2.318 2.505 0.188
NaO sodium monoxide rONa 2.052 1.866 -0.186
K2 Potassium diatomic rKK 3.905 4.086 0.181
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.540 0.181
AsF5 Arsenic pentafluoride rAsF 1.656 1.834 0.178
C4H4N2O2 Uracil rNH 0.836 1.013 0.177
ClF5 chlorinepentafluoride rFCl 1.650 1.826 0.176
CaC Calcium monocarbide rCCa 2.302 2.476 0.174
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
CaCl calcium monochloride rClCa 2.437 2.604 0.168
Si2H2 disilyne rSiH 1.668 1.504 -0.164
C2 Carbon diatomic rCC 1.243 1.406 0.164
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
B2Cl4 Diboron tetrachloride rBB 1.702 1.543 -0.159
CaH Calcium monohydride rCaH 2.003 2.158 0.155
C10H8 Azulene rCC 1.414 1.569 0.154
C4H4N2O2 Uracil rCH 0.931 1.084 0.153
AlP Aluminum monophosphide rAlP 2.400 2.247 -0.153
AlP Aluminum monophosphide rAlP 2.400 2.247 -0.153
AlP Aluminum monophosphide rAlP 2.400 2.247 -0.153
CaOH Calcium monohydroxide rOCa 1.976 2.124 0.148
Li2+ lithium diatomic cation rLiLi 3.112 2.966 -0.146
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.096 -0.144
C4H4N2O2 Uracil rNH 0.877 1.016 0.139
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
C10H8 Azulene rCC 1.407 1.542 0.135
B2 Boron diatomic rBB 1.590 1.459 -0.131
B2 Boron diatomic rBB 1.590 1.459 -0.131
C4H4N2O2 Uracil rCH 0.957 1.088 0.131
ClOOCl Dichlorine dioxide rOCl 1.704 1.574 -0.131
AlN Aluminum nitride rNAl 1.786 1.915 0.129
B2F4 Diboron tetrafluoride rBF 1.317 1.444 0.127
N2O4 Dinitrogen tetroxide rNN 1.782 1.907 0.125
N2O4 Dinitrogen tetroxide rNN 1.782 1.907 0.125
C2H4O3 trioxolane124 rCN 1.303 1.422 0.119
N2 Nitrogen diatomic rNN 1.098 1.214 0.117
N2 Nitrogen diatomic rNN 1.098 1.214 0.117
LiK Lithium Potassium rLiK 3.270 3.385 0.115
C10H8 Azulene rCC 1.405 1.292 -0.113
NO3 Nitrogen trioxide rNO 1.238 1.348 0.111
Al2 Aluminum diatomic rAlAl 2.701 2.591 -0.110
He2+ helium diatomic cation rHeHe 1.081 1.190 0.109
ClFO3 Perchloryl fluoride rFCl 1.598 1.707 0.109
C10H8 Azulene rCC 1.398 1.289 -0.109
NO3 Nitrogen trioxide rNO 1.238 1.345 0.107
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
CH3COCH3 Acetone rCO 1.214 1.320 0.106
KCl Potassium Chloride rKCl 2.667 2.768 0.102
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.430 0.101
FSN Thiazyl fluoride rFS 1.643 1.743 0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
ClF3 Chlorine trifluoride rFCl 1.697 1.795 0.099
ClF3 Chlorine trifluoride rFCl 1.697 1.795 0.099
CO Carbon monoxide rCO 1.128 1.225 0.097
ClNO2 Nitryl chloride rNCl 1.840 1.936 0.096
NaLi lithium sodium rLiNa 2.889 2.985 0.096
NaLi lithium sodium rLiNa 2.889 2.984 0.095
KF Potassium Fluoride rKF 2.171 2.264 0.093
Si2H2 disilyne rSiSi 2.215 2.123 -0.092
B2 Boron diatomic rBB 1.590 1.499 -0.091
Li2 Lithium diatomic rLiLi 2.673 2.764 0.091
HCCl Chloromethylene rCCl 1.696 1.607 -0.089
Ne2 Neon diatomic rNeNe 3.100 3.013 -0.087
KrF2 Krypton difluoride rFKr 1.875 1.962 0.087
SO2F2 Sulfuryl fluoride rFS 1.530 1.617 0.087
C2H Ethynyl radical rCC 1.217 1.303 0.086
KBr Potassium Bromide rKBr 2.821 2.906 0.085
C3H4O Cyclopropanone rCO 1.191 1.275 0.084
S8 Octasulfur rSS 2.059 1.975 -0.084
ClF3 Chlorine trifluoride rFCl 1.597 1.680 0.083
ClF3 Chlorine trifluoride rFCl 1.597 1.680 0.083
C3H3N3 1,3,5-Triazine rCN 1.338 1.421 0.083
Na2 Sodium diatomic rNaNa 3.079 3.161 0.082
Na2 Sodium diatomic rNaNa 3.079 3.161 0.082
BC boron monocarbide rBC 1.491 1.410 -0.081
Si2H2 disilyne rSiSi 2.215 2.135 -0.081
C10H8 Azulene rCC 1.377 1.297 -0.080
Si2H2 disilyne rSiH 1.668 1.747 0.079
CH3OCl methyl hypochlorite rOCl 1.674 1.752 0.078
C2 Carbon diatomic rCC 1.243 1.320 0.078
H2SO4 Sulfuric acid rSO 1.574 1.651 0.077
KOH Potassium hydroxide rOK 2.212 2.288 0.077
ClF3 Chlorine trifluoride rFCl 1.697 1.773 0.076
ClF3 Chlorine trifluoride rFCl 1.697 1.773 0.076
FSSF Difluorodisulfane rFS 1.635 1.709 0.074
Si2 Silicon diatomic rSiSi 2.246 2.172 -0.074
CFCl chlorofluoromethylene rCCl 1.714 1.788 0.074
CaBr2 Calcium dibromide rCaBr 2.616 2.689 0.073
SiP Silicon monophosphide rSiP 2.078 2.004 -0.073
SiP Silicon monophosphide rSiP 2.078 2.004 -0.073
NCl3 nitrogen trichloride rNCl 1.754 1.826 0.073
SiC silicon monocarbide rCSi 1.722 1.649 -0.073
SF4 Sulfur tetrafluoride rSF 1.545 1.617 0.072
SF4 Sulfur tetrafluoride rSF 1.545 1.617 0.072
C3H4O Cyclopropanone rCH 1.086 1.014 -0.072
C4H8O2 Ethyl acetate rCO 1.448 1.519 0.071
OClO Chlorine dioxide rClO 1.470 1.541 0.071
OClO Chlorine dioxide rClO 1.470 1.540 0.070
FNO2 Nitryl fluoride rNF 1.467 1.536 0.069
Cl2 Chlorine diatomic rClCl 1.988 2.057 0.069
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.424 -0.069
H2Cl+ dihydrogen monochloride cation rHCl 1.321 1.389 0.068
C4H10O Ethoxy ethane rCO 1.411 1.479 0.068
PF+ phosphorus monofluoride cation rFP 1.500 1.569 0.068
OPCl Phosphorus oxychloride rPCl 2.059 2.127 0.068
Al2 Aluminum diatomic rAlAl 2.701 2.634 -0.067
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.846 0.067
SF4 Sulfur tetrafluoride rSF 1.646 1.713 0.067
KH Potassium hydride rKH 2.243 2.309 0.066
SF4 Sulfur tetrafluoride rSF 1.646 1.712 0.066
ClNO Nitrosyl chloride rNCl 1.975 2.040 0.065
ZnCN Zinc monocyanide rCZn 1.950 2.014 0.064
ClNO Nitrosyl chloride rNCl 1.975 2.039 0.064
C4H6O2 2,3-Butanedione rCC 1.507 1.570 0.063
SF6 Sulfur Hexafluoride rSF 1.561 1.623 0.062
SF6 Sulfur Hexafluoride rSF 1.561 1.623 0.062
C2H2+ acetylene cation rCC 1.253 1.315 0.062
C2Cl4 Tetrachloroethylene rCC 1.354 1.416 0.062
BHCl2 Borane, dichloro- rBH 1.130 1.192 0.062
SF2 sulfur difluoride rSF 1.587 1.649 0.061
SFCl Sulfur chloride fluoride rSCl 1.994 2.055 0.061
SF2 sulfur difluoride rSF 1.587 1.649 0.061
Cl2+ chlorine diatomic cation rClCl 1.892 1.953 0.061
PF3 Phosphorus trifluoride rFP 1.561 1.622 0.061
SiC silicon monocarbide rCSi 1.722 1.783 0.061
ClFO3 Perchloryl fluoride rClO 1.400 1.460 0.060
SeF4 Selenium tetrafluoride rFSe 1.771 1.831 0.060
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.841 0.060
LiS Lithium monosulfide rLiS 2.150 2.209 0.060
ClOOCl Dichlorine dioxide rOO 1.426 1.366 -0.059
LiCl lithium chloride rLiCl 2.021 2.080 0.059
SiF2 Silicon difluoride rFSi 1.590 1.649 0.059
C4H6O2 2,3-Butanedione rCC 1.507 1.566 0.059
LiCl lithium chloride rLiCl 2.021 2.079 0.059
FNO Nitrosyl fluoride rNF 1.512 1.571 0.059
SiF+ silicon monofluoride cation rFSi 1.527 1.585 0.059
FNO Nitrosyl fluoride rNF 1.512 1.570 0.058
SFCl Sulfur chloride fluoride rFS 1.606 1.664 0.058
PF2 Phosphorus difluoride rPF 1.579 1.637 0.058
SeO3 selenium trioxide rSeO 1.688 1.630 -0.058
MgCl magnesium monochloride rMgCl 2.199 2.257 0.058
BrF5 bromine pentafluoride rFBr 1.689 1.747 0.058
PCl3 Phosphorus trichloride rPCl 2.043 1.985 -0.058
BrF3 Bromine trifluoride rFBr 1.721 1.778 0.057
MgH magnesium monohydride rMgH 1.730 1.787 0.057
BrCl Bromine monochloride rClBr 2.136 2.193 0.057
SiF2 Silicon difluoride rFSi 1.590 1.647 0.057
GeF4 Germanium tetrafluoride rFGe 1.670 1.727 0.057
GaF Gallium monofluoride rFGa 1.774 1.831 0.057
MgH magnesium monohydride rMgH 1.730 1.787 0.057
HSiCl Chlorosilylene rSiCl 2.067 2.124 0.057
SCl sulfur monochloride rSCl 1.975 2.032 0.057
GeF4 Germanium tetrafluoride rFGe 1.670 1.726 0.056
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.094 0.056
SiF2 Silicon difluoride rFSi 1.590 1.646 0.056
GaF Gallium monofluoride rFGa 1.774 1.830 0.056
ScF Scandium monofluoride rFSc 1.788 1.843 0.055
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.525 -0.055
BrCl Bromine monochloride rClBr 2.136 2.191 0.055
AlF Aluminum monofluoride rAlF 1.654 1.709 0.055
AlF Aluminum monofluoride rAlF 1.654 1.709 0.055
SiBr Silicon monobromide rSiBr 2.209 2.264 0.055
PCl5 Phosphorus pentachloride rPCl 2.124 2.179 0.055
SF Monosulfur monofluoride rSF 1.599 1.654 0.054
GeF+ Germanium monofluoride cation rFGe 1.665 1.719 0.054
CH2BrF Methane, bromofluoro- rCBr 1.915 1.968 0.053
SF Monosulfur monofluoride rSF 1.599 1.652 0.053
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.083 0.053
SiCl Clorosilylidyne rSiCl 2.061 2.114 0.053
CH3CHClCH3 Propane, 2-chloro- rCCl 1.798 1.851 0.053
CH2CHCH2F Allyl Fluoride rCF 1.370 1.423 0.053
CH2CHCH2F Allyl Fluoride rCF 1.370 1.423 0.053
SiCl Clorosilylidyne rSiCl 2.061 2.114 0.053
ClF Chlorine monofluoride rFCl 1.628 1.681 0.052
SeF4 Selenium tetrafluoride rFSe 1.682 1.734 0.052
CH3CHClCH3 Propane, 2-chloro- rCCl 1.798 1.850 0.052
HSSSH trisulfane rSS 2.053 2.105 0.052
HSSSH trisulfane rSS 2.053 2.105 0.052
GeF Germanium monofluoride rFGe 1.745 1.797 0.052
PF5 Phosphorus pentafluoride rPF 1.534 1.586 0.052
PF5 Phosphorus pentafluoride rPF 1.534 1.586 0.052
KOH Potassium hydroxide rOH 0.912 0.963 0.051
P2+ phosphorus diatomic cation rPP 1.986 2.037 0.051
LiBr Lithium Bromide rLiBr 2.170 2.222 0.051
GeF Germanium monofluoride rFGe 1.745 1.796 0.051
HSSSH trisulfane rSS 2.054 2.105 0.051
HSSSH trisulfane rSS 2.054 2.105 0.051
LiBr Lithium Bromide rLiBr 2.170 2.221 0.051
C2H6O2S Dimethyl sulfone rSO 1.431 1.482 0.051
HOSH hydrogen thioperoxide rSO 1.662 1.713 0.051
CH3SOCH3 Dimethyl sulfoxide rCS 1.799 1.850 0.051
C4H6 Methylenecyclopropane rCH 1.088 1.037 -0.051
SO Sulfur monoxide rSO 1.481 1.532 0.050
SO Sulfur monoxide rSO 1.481 1.532 0.050
Br2 Bromine diatomic rBrBr 2.281 2.331 0.050
HCO Formyl radical rCH 1.080 1.130 0.050
SO Sulfur monoxide rSO 1.481 1.531 0.050
SO Sulfur monoxide rSO 1.481 1.531 0.050
HSSSH trisulfane rSS 2.053 2.103 0.050
HSSSH trisulfane rSS 2.053 2.103 0.050
GaCl3 Gallium trichloride rClGa 2.180 2.130 -0.050
BrF3 Bromine trifluoride rFBr 1.810 1.860 0.050
SO3 Sulfur trioxide rSO 1.418 1.468 0.050
282 molecules.