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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 wB97X-D/3-21G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.197 3.112
C4H6 1-Methylcyclopropene rCH 1.087 3.433 2.346
H2SO4 Sulfuric acid rOH 0.970 2.915 1.945
C4H8S Thiophene, tetrahydro- rCC 1.532 3.298 1.766
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.458 1.341
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
H2ONH3 Water Ammonia Dimer rNH 2.983 2.027 -0.956
C4H6 1-Methylcyclopropene rCC 1.476 2.271 0.795
C4H6 1-Methylcyclopropene rCH 1.087 1.837 0.750
CH3CH2SH ethanethiol rCH 1.095 1.834 0.739
CH3CH2SH ethanethiol rCH 1.095 1.833 0.738
CH3CH2SH ethanethiol rCH 1.095 1.830 0.735
S4 Sulfur tetramer rSS 2.155 2.888 0.733
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.177 0.731
C4H8S Thiophene, tetrahydro- rCH 1.117 1.842 0.725
HSSSH trisulfane rHS 1.344 2.064 0.720
HSSSH trisulfane rHS 1.344 2.064 0.720
HSSSH trisulfane rHS 1.344 2.063 0.720
HSSSH trisulfane rHS 1.344 2.063 0.720
C4H6 1-Methylcyclopropene rCH 1.098 1.782 0.684
Na2Cl2 Disodium dichloride rNaCl 2.584 3.264 0.680
C4H6 1-Methylcyclopropene rCH 1.098 1.767 0.669
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
Be2 Beryllium diatomic rBeBe 2.460 1.939 -0.521
Li2 Lithium diatomic rLiLi 2.673 3.159 0.486
C4H4N2 Succinonitrile rCC 1.561 1.096 -0.465
C4H6 1-Methylcyclopropene rCH 1.070 1.531 0.461
CH3CH2SH ethanethiol rCH 1.089 1.536 0.447
CH3CH2SH ethanethiol rCH 1.089 1.536 0.447
CH3CH2SH ethanethiol rCH 1.089 1.534 0.445
CH3CH2SH ethanethiol rCH 1.092 1.536 0.444
CH3CH2SH ethanethiol rCH 1.092 1.536 0.444
CH3CH2SH ethanethiol rCH 1.092 1.534 0.442
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.484 0.436
C4H10O Methyl propyl ether rCC 1.530 1.096 -0.434
CH3SO2NH2 methanesulfonamide rCN 1.207 1.636 0.429
C2H4F2 1,2-difluoroethane rCH 1.093 1.522 0.429
C2H4F2 1,2-difluoroethane rCH 1.093 1.522 0.429
C4H4N2 Succinonitrile rCH 1.123 1.552 0.429
C4H6 1-Methylcyclopropene rCC 1.515 1.088 -0.427
C2H4F2 1,2-difluoroethane rCH 1.093 1.513 0.420
ONNO NO dimer rNN 2.236 1.816 -0.420
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
S4 Sulfur tetramer rSS 2.155 2.556 0.401
CH2CHCH2F Allyl Fluoride rHC 1.130 1.502 0.372
CH2CHCH2F Allyl Fluoride rHC 1.130 1.501 0.371
GaP Gallium monophosphide rPGa 2.450 2.092 -0.358
GaP Gallium monophosphide rPGa 2.450 2.092 -0.358
GaP Gallium monophosphide rPGa 2.450 2.092 -0.358
GaP Gallium monophosphide rPGa 2.450 2.092 -0.358
C3H3NO Isoxazole rCH 1.075 1.429 0.354
C4H4N2 Succinonitrile rCH 1.111 1.459 0.348
C4H10O Methyl propyl ether rCH 1.099 1.443 0.344
C4H8S Thiophene, tetrahydro- rCS 1.835 2.173 0.338
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
CH3CH2SH ethanethiol rCC 1.528 1.834 0.306
CH3CH2SH ethanethiol rCC 1.528 1.833 0.305
CH3CH2SH ethanethiol rCC 1.528 1.830 0.302
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
CH3CH2SH ethanethiol rCS 1.820 1.534 -0.286
SeO3 selenium trioxide rSeO 1.688 1.974 0.286
C2H2+ acetylene cation rCH 1.077 1.361 0.285
CH3CH2SH ethanethiol rCS 1.820 1.536 -0.284
CH3CH2SH ethanethiol rCS 1.820 1.536 -0.284
Si2H2 disilyne rSiSi 2.215 1.956 -0.260
Ar2+ Argon diatomic cation rArAr 2.320 2.566 0.246
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.284 0.244
S4 Sulfur tetramer rSS 1.898 2.132 0.234
C4H6 1-Methylcyclopropene rCC 1.300 1.534 0.234
NaO sodium monoxide rONa 2.052 1.825 -0.226
B2 Boron diatomic rBB 1.590 1.367 -0.223
B2F4 Diboron tetrafluoride rBB 1.720 1.502 -0.218
CaO Calcium monoxide rOCa 1.822 2.040 0.218
CaO Calcium monoxide rOCa 1.822 2.035 0.213
AsF5 Arsenic pentafluoride rAsF 1.711 1.919 0.208
Si2 Silicon diatomic rSiSi 2.246 2.040 -0.206
Si2H2 disilyne rSiH 1.668 1.464 -0.204
Al2 Aluminum diatomic rAlAl 2.701 2.501 -0.200
CaS Calcium sulfide rSCa 2.318 2.517 0.199
GaP Gallium monophosphide rPGa 2.450 2.254 -0.196
GaP Gallium monophosphide rPGa 2.450 2.254 -0.196
GaP Gallium monophosphide rPGa 2.450 2.254 -0.196
GaP Gallium monophosphide rPGa 2.450 2.254 -0.196
AlP Aluminum monophosphide rAlP 2.400 2.207 -0.193
AlP Aluminum monophosphide rAlP 2.400 2.207 -0.193
AlP Aluminum monophosphide rAlP 2.400 2.207 -0.193
CaCl calcium monochloride rClCa 2.437 2.623 0.186
SiP Silicon monophosphide rSiP 2.078 1.895 -0.182
NO3 Nitrogen trioxide rNO 1.238 1.419 0.182
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
NO3 Nitrogen trioxide rNO 1.238 1.418 0.181
AsF5 Arsenic pentafluoride rAsF 1.656 1.836 0.180
ClF5 chlorinepentafluoride rFCl 1.650 1.827 0.177
Si2H2 disilyne rSiH 1.668 1.491 -0.177
C4H4N2O2 Uracil rNH 0.836 1.012 0.176
CaH Calcium monohydride rCaH 2.003 2.173 0.171
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.634 -0.170
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
S3 Sulfur trimer rSS 1.917 2.084 0.167
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.520 0.161
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
Cu2 Copper diatomic rCuCu 2.220 2.061 -0.158
GaP Gallium monophosphide rPGa 2.250 2.092 -0.158
GaP Gallium monophosphide rPGa 2.250 2.092 -0.158
GaP Gallium monophosphide rPGa 2.250 2.092 -0.158
GaP Gallium monophosphide rPGa 2.250 2.092 -0.158
Li2+ lithium diatomic cation rLiLi 3.112 2.954 -0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.084 -0.156
B2Cl4 Diboron tetrachloride rBB 1.702 1.547 -0.155
C10H8 Azulene rCC 1.414 1.568 0.154
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
ClF3 Chlorine trifluoride rFCl 1.597 1.745 0.149
ClF3 Chlorine trifluoride rFCl 1.597 1.745 0.149
K2 Potassium diatomic rKK 3.905 4.053 0.148
GaP Gallium monophosphide rPGa 2.240 2.092 -0.148
GaP Gallium monophosphide rPGa 2.240 2.092 -0.148
GaP Gallium monophosphide rPGa 2.240 2.092 -0.148
GaP Gallium monophosphide rPGa 2.240 2.092 -0.148
C4H4N2O2 Uracil rCH 0.931 1.076 0.145
HOCO+ Hydrocarboxyl cation rCO 1.209 1.354 0.145
B2 Boron diatomic rBB 1.590 1.445 -0.145
Si2H2 disilyne rSiSi 2.215 2.070 -0.145
GaP Gallium monophosphide rPGa 2.110 2.254 0.144
GaP Gallium monophosphide rPGa 2.110 2.254 0.144
GaP Gallium monophosphide rPGa 2.110 2.254 0.144
GaP Gallium monophosphide rPGa 2.110 2.254 0.144
C2H4O3 trioxolane124 rCN 1.303 1.446 0.143
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
BH3NH3 borane ammonia rBH 1.206 1.067 -0.139
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
ZnS Zinc sulfide rSZn 2.046 2.185 0.138
CuF Copper monofluoride rCuF 1.745 1.607 -0.138
C4H4N2O2 Uracil rNH 0.877 1.014 0.137
N2 Nitrogen diatomic rNN 1.098 1.234 0.137
N2 Nitrogen diatomic rNN 1.098 1.234 0.137
ClOOCl Dichlorine dioxide rOCl 1.704 1.571 -0.134
Si2H2 disilyne rSiSi 2.215 2.085 -0.130
C10H8 Azulene rCC 1.407 1.537 0.130
CuO Copper Monoxide rCuO 1.724 1.596 -0.128
C4H4N2O2 Uracil rCH 0.957 1.081 0.124
B2F4 Diboron tetrafluoride rBF 1.317 1.441 0.124
ZnS Zinc sulfide rSZn 2.046 1.929 -0.117
Na2 Sodium diatomic rNaNa 3.079 3.195 0.116
Na2 Sodium diatomic rNaNa 3.079 3.194 0.115
NF3 Nitrogen trifluoride rNF 1.365 1.480 0.115
NaLi lithium sodium rLiNa 2.889 3.004 0.115
ZnCN Zinc monocyanide rCZn 1.950 1.836 -0.114
Si2 Silicon diatomic rSiSi 2.246 2.132 -0.114
C10H8 Azulene rCC 1.405 1.291 -0.114
SiP Silicon monophosphide rSiP 2.078 1.964 -0.113
NaLi lithium sodium rLiNa 2.889 3.002 0.113
CF3 Trifluoromethyl radical rCF 1.318 1.430 0.112
C10H8 Azulene rCC 1.398 1.288 -0.110
Al2 Aluminum diatomic rAlAl 2.701 2.591 -0.110
PF3 Phosphorus trifluoride rFP 1.561 1.670 0.109
C2F4 Tetrafluoroethylene rCF 1.319 1.427 0.108
N2 Nitrogen diatomic rNN 1.213 1.109 -0.104
N2 Nitrogen diatomic rNN 1.213 1.109 -0.104
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.431 0.103
LiK Lithium Potassium rLiK 3.270 3.371 0.101
Al2 Aluminum diatomic rAlAl 2.701 2.600 -0.101
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
CuCl Copper monochloride rCuCl 2.051 1.954 -0.098
CaBr Calcium monobromide rCaBr 2.594 2.688 0.094
Ne2 Neon diatomic rNeNe 3.100 3.006 -0.094
O2+ diatomic oxygen cation rOO 1.116 1.210 0.093
BH3NH3 borane ammonia rBN 1.645 1.553 -0.092
B2 Boron diatomic rBB 1.590 1.499 -0.091
KCl Potassium Chloride rKCl 2.667 2.758 0.091
HCCl Chloromethylene rCCl 1.696 1.607 -0.089
AlN Aluminum nitride rNAl 1.786 1.698 -0.089
S8 Octasulfur rSS 2.059 1.971 -0.088
CFCl chlorofluoromethylene rCCl 1.714 1.802 0.088
NCl nitrogen monochloride rNCl 1.611 1.697 0.086
SiC silicon monocarbide rCSi 1.722 1.636 -0.085
C3H4O Cyclopropanone rCO 1.191 1.276 0.085
KH Potassium hydride rKH 2.243 2.327 0.085
C10H8 Azulene rCC 1.377 1.293 -0.084
O2 Oxygen diatomic rOO 1.208 1.289 0.082
C3H3N3 1,3,5-Triazine rCN 1.338 1.420 0.082
CHCl3 Chloroform rCCl 1.762 1.681 -0.081
BC boron monocarbide rBC 1.491 1.411 -0.080
O2 Oxygen diatomic rOO 1.208 1.287 0.080
O2 Oxygen diatomic rOO 1.208 1.286 0.079
HOCO+ Hydrocarboxyl cation rCO 1.140 1.218 0.078
He2+ helium diatomic cation rHeHe 1.081 1.159 0.078
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.416 -0.077
C2 Carbon diatomic rCC 1.243 1.319 0.077
NF3 Nitrogen trifluoride rNF 1.365 1.441 0.076
LiCl lithium chloride rLiCl 2.021 2.096 0.076
NO+ nitric oxide cation rNO 1.066 1.141 0.076
SiC silicon monocarbide rCSi 1.722 1.647 -0.075
C4H8O2 Ethyl acetate rCO 1.448 1.522 0.074
C4H10O Ethoxy ethane rCO 1.411 1.484 0.073
NaOH sodium hydroxide rNaO 1.950 1.878 -0.072
C3H4O Cyclopropanone rCH 1.086 1.014 -0.072
Li2 Lithium diatomic rLiLi 2.673 2.745 0.072
NaF sodium fluoride rNaF 1.926 1.855 -0.071
KOH Potassium hydroxide rOH 0.912 0.983 0.071
CO Carbon monoxide rCO 1.128 1.199 0.071
C2H2N2O Furazan rNO 1.373 1.443 0.070
PCl3 Phosphorus trichloride rPCl 2.043 1.974 -0.069
H2Cl+ dihydrogen monochloride cation rHCl 1.321 1.390 0.069
ClNO2 Nitryl chloride rNCl 1.840 1.909 0.069
OH- hydroxide anion rOH 0.964 1.032 0.068
NO- nitric oxide anion rNO 1.258 1.326 0.068
NBr nitrogen monobromide rNBr 1.765 1.833 0.068
LiCl lithium chloride rLiCl 2.021 2.088 0.067
NO- nitric oxide anion rNO 1.258 1.325 0.067
CH3OCl methyl hypochlorite rCO 1.389 1.456 0.067
LiS Lithium monosulfide rLiS 2.150 2.215 0.066
ClF3 Chlorine trifluoride rFCl 1.597 1.660 0.064
ClF3 Chlorine trifluoride rFCl 1.597 1.660 0.064
LiI Lithium Iodide rLiI 2.392 2.455 0.063
FOO Dioxygen monofluoride radical rOO 1.200 1.263 0.063
C2H4O Ethylene oxide rCO 1.425 1.488 0.063
BrF5 bromine pentafluoride rFBr 1.689 1.752 0.063
BH3NH3 borane ammonia rNH 1.010 0.948 -0.062
C5H6 Propellane rCC 1.596 1.658 0.062
F2+ flourine diatomic cation rFF 1.322 1.384 0.062
C2H2+ acetylene cation rCC 1.253 1.314 0.061
CuH Copper monohydride rCuH 1.463 1.402 -0.061
BrO Bromine monoxide rOBr 1.718 1.778 0.060
BrO Bromine monoxide rOBr 1.718 1.777 0.060
ClFO3 Perchloryl fluoride rFCl 1.598 1.657 0.059
ClO Monochlorine monoxide rClO 1.596 1.655 0.059
NCl nitrogen monochloride rNCl 1.611 1.669 0.059
SeO3 selenium trioxide rSeO 1.688 1.630 -0.058
HO2 Hydroperoxy radical rOO 1.331 1.389 0.058
HNO3 Nitric acid rNO 1.406 1.464 0.058
Si2H2 disilyne rSiH 1.668 1.726 0.058
GaCl3 Gallium trichloride rClGa 2.180 2.122 -0.058
CH3CHNOH Acetaldoxime rNO 1.408 1.466 0.058
BHCl2 Borane, dichloro- rBH 1.130 1.186 0.056
NHF2 difluoramine rNF 1.400 1.456 0.056
NH2SH Thiohydroxylamine rNS 1.719 1.663 -0.056
NH2SH Thiohydroxylamine rNS 1.719 1.663 -0.056
NH2SH Thiohydroxylamine rNS 1.719 1.663 -0.056
NH2SH Thiohydroxylamine rNS 1.719 1.663 -0.056
HN3 hydrogen azide rNH 0.975 1.031 0.056
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.345 -0.055
HN3 hydrogen azide rNH 0.975 1.030 0.055
SeO Selenium monoxide rSeO 1.639 1.694 0.055
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.658 0.055
C4H6 Methylenecyclopropane rCH 1.088 1.033 -0.055
SeO Selenium monoxide rSeO 1.639 1.694 0.054
FO Oxygen monofluoride rFO 1.354 1.408 0.054
LiH Lithium Hydride rLiH 1.595 1.649 0.054
GaCl3 Gallium trichloride rClGa 2.180 2.127 -0.053
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.527 -0.053
FSSF Difluorodisulfane rSS 1.890 1.943 0.053
AlP Aluminum monophosphide rAlP 2.260 2.207 -0.053
AlP Aluminum monophosphide rAlP 2.260 2.207 -0.053
AlP Aluminum monophosphide rAlP 2.260 2.207 -0.053
BrCN Cyanogen bromide rCBr 1.789 1.842 0.053
S3 Sulfur trimer rSS 1.917 1.865 -0.052
CH2NOH formaldoxime rNO 1.408 1.460 0.052
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.833 0.052
HCCl Chloromethylene rCH 1.119 1.067 -0.052
CH3CF3 Ethane, 1,1,1-trifluoro- rCH 1.081 1.029 -0.052
MgF2 Magnesium fluoride rFMg 1.770 1.718 -0.052
KOH Potassium hydroxide rOK 2.212 2.160 -0.051
C3H8O2 1,3-Propanediol rCO 1.410 1.461 0.051
CH2CHCH2F Allyl Fluoride rCF 1.370 1.421 0.051
CH2CHCH2F Allyl Fluoride rCF 1.370 1.421 0.051
C4H6 Methylenecyclopropane rCH 1.090 1.039 -0.051
Zn(CH3)2 dimethyl zinc rZnC 1.930 1.879 -0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.500 -0.050
C3H6O3 1,3,5-Trioxane rCO 1.421 1.471 0.050
BrF3 Bromine trifluoride rFBr 1.721 1.771 0.050
CH3CHNOH Acetaldoxime rCC 1.550 1.500 -0.050
280 molecules.