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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/Def2TZVPP

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.229 3.144
C4H6 1-Methylcyclopropene rCH 1.087 3.423 2.336
H2SO4 Sulfuric acid rOH 0.970 2.872 1.902
C4H8S Thiophene, tetrahydro- rCC 1.532 3.309 1.777
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.436 1.319
Mg2 Magnesium diatomic rMgMg 3.891 2.683 -1.208
H2ONH3 Water Ammonia Dimer rNH 2.983 2.061 -0.922
C4H6 1-Methylcyclopropene rCC 1.476 2.266 0.790
C4H6 1-Methylcyclopropene rCH 1.087 1.839 0.752
CH3CH2SH ethanethiol rCH 1.095 1.832 0.737
CH3CH2SH ethanethiol rCH 1.095 1.831 0.736
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.182 0.736
CH3CH2SH ethanethiol rCH 1.095 1.828 0.733
HSSSH trisulfane rHS 1.344 2.067 0.723
HSSSH trisulfane rHS 1.344 2.067 0.723
HSSSH trisulfane rHS 1.344 2.066 0.723
HSSSH trisulfane rHS 1.344 2.066 0.723
C4H8S Thiophene, tetrahydro- rCH 1.117 1.838 0.721
S4 Sulfur tetramer rSS 2.155 2.864 0.709
C4H6 1-Methylcyclopropene rCH 1.098 1.787 0.689
C4H6 1-Methylcyclopropene rCH 1.098 1.765 0.667
Na2Cl2 Disodium dichloride rNaCl 2.584 3.237 0.653
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 3.155 0.482
C4H4N2 Succinonitrile rCC 1.561 1.099 -0.462
CH3SO2NH2 methanesulfonamide rCN 1.207 1.667 0.460
C4H6 1-Methylcyclopropene rCH 1.070 1.512 0.442
CH3CH2SH ethanethiol rCH 1.089 1.526 0.437
CH3CH2SH ethanethiol rCH 1.089 1.526 0.437
CH3CH2SH ethanethiol rCH 1.092 1.526 0.434
CH3CH2SH ethanethiol rCH 1.089 1.523 0.434
CH3CH2SH ethanethiol rCH 1.092 1.526 0.434
C2H4F2 1,2-difluoroethane rCH 1.093 1.525 0.432
CH3CH2SH ethanethiol rCH 1.092 1.523 0.431
C4H10O Methyl propyl ether rCC 1.530 1.100 -0.430
C4H4N2 Succinonitrile rCH 1.123 1.550 0.428
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.476 0.428
C2H4F2 1,2-difluoroethane rCH 1.093 1.521 0.428
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C4H6 1-Methylcyclopropene rCC 1.515 1.099 -0.416
C2H4F2 1,2-difluoroethane rCH 1.093 1.506 0.413
S4 Sulfur tetramer rSS 2.155 2.543 0.388
CH2CHCH2F Allyl Fluoride rHC 1.130 1.493 0.363
CH2CHCH2F Allyl Fluoride rHC 1.130 1.492 0.362
C4H4N2 Succinonitrile rCH 1.111 1.460 0.349
C3H3NO Isoxazole rCH 1.075 1.422 0.347
C4H8S Thiophene, tetrahydro- rCS 1.835 2.166 0.331
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.666 0.326
C4H10O Methyl propyl ether rCH 1.099 1.415 0.316
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
CH3CH2SH ethanethiol rCC 1.528 1.832 0.304
CH3CH2SH ethanethiol rCC 1.528 1.831 0.303
CH3CH2SH ethanethiol rCC 1.528 1.828 0.300
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
CH3CH2SH ethanethiol rCS 1.820 1.526 -0.294
CH3CH2SH ethanethiol rCS 1.820 1.526 -0.294
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
GaP Gallium monophosphide rPGa 2.110 2.397 0.287
GaP Gallium monophosphide rPGa 2.110 2.397 0.287
GaP Gallium monophosphide rPGa 2.110 2.397 0.287
GaP Gallium monophosphide rPGa 2.110 2.397 0.287
SeO3 selenium trioxide rSeO 1.688 1.973 0.285
ONNO NO dimer rNN 2.236 1.958 -0.278
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.291 0.251
C2H2+ acetylene cation rCH 1.077 1.326 0.249
ZnS Zinc sulfide rSZn 2.046 2.281 0.234
Si2H2 disilyne rSiSi 2.215 1.984 -0.232
S4 Sulfur tetramer rSS 1.898 2.126 0.228
B2F4 Diboron tetrafluoride rBB 1.720 1.505 -0.215
Ar2+ Argon diatomic cation rArAr 2.320 2.533 0.213
C4H6 1-Methylcyclopropene rCC 1.300 1.512 0.212
AsF5 Arsenic pentafluoride rAsF 1.711 1.919 0.208
NaO sodium monoxide rONa 2.052 1.851 -0.201
Si2H2 disilyne rSiH 1.668 1.474 -0.194
N2 Nitrogen diatomic rNN 1.098 1.289 0.192
N2 Nitrogen diatomic rNN 1.098 1.289 0.192
Si2 Silicon diatomic rSiSi 2.246 2.060 -0.186
AsF5 Arsenic pentafluoride rAsF 1.656 1.837 0.181
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.539 0.180
Al2 Aluminum diatomic rAlAl 2.701 2.521 -0.180
C4H4N2O2 Uracil rNH 0.836 1.014 0.178
SiP Silicon monophosphide rSiP 2.078 1.901 -0.177
ClF5 chlorinepentafluoride rFCl 1.650 1.824 0.174
AlP Aluminum monophosphide rAlP 2.400 2.227 -0.173
AlP Aluminum monophosphide rAlP 2.400 2.227 -0.173
AlP Aluminum monophosphide rAlP 2.400 2.227 -0.173
S3 Sulfur trimer rSS 1.917 2.088 0.171
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.634 -0.170
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.635 -0.169
Ar2 Argon diatomic rArAr 3.758 3.925 0.167
Si2H2 disilyne rSiH 1.668 1.506 -0.162
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
GaP Gallium monophosphide rPGa 2.240 2.397 0.157
GaP Gallium monophosphide rPGa 2.240 2.397 0.157
GaP Gallium monophosphide rPGa 2.240 2.397 0.157
GaP Gallium monophosphide rPGa 2.240 2.397 0.157
B2Cl4 Diboron tetrachloride rBB 1.702 1.546 -0.156
C2 Carbon diatomic rCC 1.243 1.398 0.155
C4H4N2O2 Uracil rCH 0.931 1.086 0.155
Li2+ lithium diatomic cation rLiLi 3.112 2.959 -0.153
C10H8 Azulene rCC 1.414 1.564 0.149
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.091 -0.149
GaP Gallium monophosphide rPGa 2.250 2.397 0.147
GaP Gallium monophosphide rPGa 2.250 2.397 0.147
GaP Gallium monophosphide rPGa 2.250 2.397 0.147
GaP Gallium monophosphide rPGa 2.250 2.397 0.147
SiF3 Silicon trifluoride radical rFSi 1.565 1.709 0.144
C4H4N2O2 Uracil rNH 0.877 1.018 0.141
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
BH3NH3 borane ammonia rBH 1.206 1.068 -0.138
K2 Potassium diatomic rKK 3.905 4.042 0.137
ClF3 Chlorine trifluoride rFCl 1.597 1.733 0.137
ClF3 Chlorine trifluoride rFCl 1.597 1.733 0.137
ClOOCl Dichlorine dioxide rOCl 1.704 1.571 -0.133
C4H4N2O2 Uracil rCH 0.957 1.090 0.133
HOCO+ Hydrocarboxyl cation rCO 1.209 1.340 0.132
AlP Aluminum monophosphide rAlP 2.400 2.269 -0.131
AlP Aluminum monophosphide rAlP 2.400 2.269 -0.131
AlP Aluminum monophosphide rAlP 2.400 2.269 -0.131
B2 Boron diatomic rBB 1.590 1.459 -0.131
B2 Boron diatomic rBB 1.590 1.459 -0.131
C10H8 Azulene rCC 1.407 1.538 0.131
B2F4 Diboron tetrafluoride rBF 1.317 1.441 0.124
C2 Carbon diatomic rCC 1.243 1.365 0.122
PF3 Phosphorus trifluoride rFP 1.561 1.680 0.119
C10H8 Azulene rCC 1.405 1.289 -0.115
C2H4O3 trioxolane124 rCN 1.303 1.418 0.115
AlN Aluminum nitride rNAl 1.786 1.901 0.114
CF3 Trifluoromethyl radical rCF 1.318 1.431 0.113
GaAs Gallium arsenide rGaAs 2.530 2.418 -0.112
NF3 Nitrogen trifluoride rNF 1.365 1.477 0.112
C10H8 Azulene rCC 1.398 1.286 -0.112
C6H12O hexanal rCC 1.420 1.531 0.111
Al2 Aluminum diatomic rAlAl 2.701 2.591 -0.110
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
Si2H2 disilyne rSiSi 2.215 2.107 -0.108
C2F4 Tetrafluoroethylene rCF 1.319 1.425 0.106
N2 Nitrogen diatomic rNN 1.213 1.107 -0.106
N2 Nitrogen diatomic rNN 1.213 1.107 -0.106
NO3 Nitrogen trioxide rNO 1.238 1.343 0.105
HCCl Chloromethylene rCCl 1.696 1.592 -0.104
Ne2 Neon diatomic rNeNe 3.100 2.998 -0.102
NO3 Nitrogen trioxide rNO 1.238 1.339 0.101
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.429 0.101
BH3NH3 borane ammonia rBN 1.645 1.549 -0.096
He2+ helium diatomic cation rHeHe 1.081 1.176 0.096
B2 Boron diatomic rBB 1.590 1.496 -0.094
Si2H2 disilyne rSiSi 2.215 2.125 -0.091
ClCOClCO Oxalyl chloride rCO 1.182 1.272 0.090
Al2 Aluminum diatomic rAlAl 2.701 2.611 -0.090
BC boron monocarbide rBC 1.491 1.402 -0.089
SiP Silicon monophosphide rSiP 2.078 1.992 -0.086
S8 Octasulfur rSS 2.059 1.973 -0.086
Si2 Silicon diatomic rSiSi 2.246 2.162 -0.084
C3H4O Cyclopropanone rCO 1.191 1.274 0.083
C10H8 Azulene rCC 1.377 1.294 -0.083
C3H3N3 1,3,5-Triazine rCN 1.338 1.420 0.082
LiK Lithium Potassium rLiK 3.270 3.352 0.082
CHCl3 Chloroform rCCl 1.762 1.680 -0.082
N2O4 Dinitrogen tetroxide rNN 1.782 1.863 0.081
ClFO3 Perchloryl fluoride rFCl 1.598 1.677 0.079
ClNO2 Nitryl chloride rNCl 1.840 1.918 0.078
Na2 Sodium diatomic rNaNa 3.079 3.156 0.077
N2 Nitrogen diatomic rNN 1.213 1.289 0.077
N2 Nitrogen diatomic rNN 1.213 1.289 0.077
SiC silicon monocarbide rCSi 1.722 1.645 -0.077
NaLi lithium sodium rLiNa 2.889 2.965 0.076
NO+ nitric oxide cation rNO 1.066 1.141 0.076
LiCl- lithium chloride anion rLiCl 2.180 2.106 -0.074
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.419 -0.073
HOCO+ Hydrocarboxyl cation rCO 1.140 1.213 0.073
B4H10 Tetraborane(10) rHB 1.484 1.412 -0.072
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.674 0.071
C3H4O Cyclopropanone rCH 1.086 1.015 -0.071
C2 Carbon diatomic rCC 1.243 1.313 0.070
SeO3 selenium trioxide rSeO 1.688 1.620 -0.068
C4H8O2 Ethyl acetate rCO 1.448 1.514 0.066
C4H10O Ethoxy ethane rCO 1.411 1.476 0.065
PCl3 Phosphorus trichloride rPCl 2.043 1.979 -0.064
CH3CHNOH Acetaldoxime rCC 1.550 1.487 -0.063
BHCl2 Borane, dichloro- rBH 1.130 1.192 0.062
BH3NH3 borane ammonia rNH 1.010 0.948 -0.062
N2O4 Dinitrogen tetroxide rNN 1.782 1.844 0.062
ClCOClCO Oxalyl chloride rCC 1.534 1.472 -0.062
SiC silicon monocarbide rCSi 1.722 1.783 0.061
FNO Nitrosyl fluoride rNF 1.512 1.452 -0.060
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.521 -0.059
C2H2+ acetylene cation rCC 1.253 1.310 0.058
Si2H2 disilyne rSiH 1.668 1.726 0.058
Li2 Lithium diatomic rLiLi 2.673 2.730 0.057
BrF5 bromine pentafluoride rFBr 1.689 1.746 0.057
C2Cl4 Tetrachloroethylene rCC 1.354 1.411 0.057
HCO Formyl radical rCH 1.080 1.135 0.055
ClOOCl Dichlorine dioxide rOO 1.426 1.371 -0.055
C4H6O2 2,3-Butanedione rCC 1.507 1.562 0.055
PF5 Phosphorus pentafluoride rFP 1.577 1.632 0.055
CH3CHNOH Acetaldoxime rCC 1.550 1.495 -0.055
GaAs Gallium arsenide rGaAs 2.530 2.584 0.054
AsF3 Arsenic trifluoride rAsF 1.706 1.760 0.054
GaP Gallium monophosphide rPGa 2.450 2.397 -0.053
GaP Gallium monophosphide rPGa 2.450 2.397 -0.053
GaP Gallium monophosphide rPGa 2.450 2.397 -0.053
GaP Gallium monophosphide rPGa 2.450 2.397 -0.053
BrCN Cyanogen bromide rCBr 1.789 1.842 0.053
CO Carbon monoxide rCO 1.128 1.180 0.052
ScF Scandium monofluoride rFSc 1.788 1.840 0.052
C4H6O2 2,3-Butanedione rCC 1.507 1.559 0.052
KOH Potassium hydroxide rOH 0.912 0.964 0.052
ClF3 Chlorine trifluoride rFCl 1.597 1.648 0.052
ClF3 Chlorine trifluoride rFCl 1.597 1.648 0.052
CF3I trifluoroiodomethane rCI 2.144 2.195 0.051
GaCl3 Gallium trichloride rClGa 2.180 2.129 -0.051
B4H10 Tetraborane(10) rHB 1.315 1.264 -0.051
HCO Formyl radical rCH 1.080 1.131 0.051
C4H6 Methylenecyclopropane rCH 1.088 1.037 -0.051
NH3BF3 Amminetrifluoroboron rBN 1.673 1.724 0.051
PF+ phosphorus monofluoride cation rFP 1.500 1.551 0.051
HN3 hydrogen azide rNH 0.975 1.026 0.051
XeF2 Xenon difluoride rFXe 1.974 2.025 0.050
XeF4 Xenon tetrafluoride rFXe 1.935 1.985 0.050
CH2BrF Methane, bromofluoro- rCBr 1.915 1.965 0.050
224 molecules.