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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 TPSSh/6-31+G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.225 3.140
C4H6 1-Methylcyclopropene rCH 1.087 3.429 2.342
H2SO4 Sulfuric acid rOH 0.970 2.889 1.919
C4H8S Thiophene, tetrahydro- rCC 1.532 3.311 1.779
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 2.052 -0.931
C4H6 1-Methylcyclopropene rCC 1.476 2.263 0.787
CH3CH2SH ethanethiol rCH 1.095 1.845 0.750
CH3CH2SH ethanethiol rCH 1.095 1.841 0.746
CH3CH2SH ethanethiol rCH 1.095 1.840 0.745
HSSSH trisulfane rHS 1.344 2.087 0.743
HSSSH trisulfane rHS 1.344 2.087 0.743
C4H6 1-Methylcyclopropene rCH 1.087 1.829 0.742
S4 Sulfur tetramer rSS 2.155 2.896 0.741
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.183 0.737
HSSSH trisulfane rHS 1.344 2.078 0.735
HSSSH trisulfane rHS 1.344 2.078 0.735
C4H8S Thiophene, tetrahydro- rCH 1.117 1.844 0.727
C4H6 1-Methylcyclopropene rCH 1.098 1.781 0.683
Na2Cl2 Disodium dichloride rNaCl 2.584 3.251 0.667
C4H6 1-Methylcyclopropene rCH 1.098 1.762 0.664
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 1.700 0.493
Li2 Lithium diatomic rLiLi 2.673 3.159 0.486
C4H4N2 Succinonitrile rCC 1.561 1.094 -0.467
S4 Sulfur tetramer rSS 2.155 2.604 0.449
C4H6 1-Methylcyclopropene rCH 1.070 1.513 0.443
CH3CH2SH ethanethiol rCH 1.089 1.529 0.440
CH3CH2SH ethanethiol rCH 1.089 1.528 0.439
CH3CH2SH ethanethiol rCH 1.089 1.528 0.439
CH3CH2SH ethanethiol rCH 1.092 1.529 0.437
CH3CH2SH ethanethiol rCH 1.092 1.528 0.436
CH3CH2SH ethanethiol rCH 1.092 1.528 0.436
C4H10O Methyl propyl ether rCC 1.530 1.096 -0.434
C2H4F2 1,2-difluoroethane rCH 1.093 1.527 0.434
C(CH3)3NH2 2-Propanamine, 2-methyl- rNH 1.048 1.477 0.429
C4H4N2 Succinonitrile rCH 1.123 1.549 0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C4H6 1-Methylcyclopropene rCC 1.515 1.095 -0.420
C2H4F2 1,2-difluoroethane rCH 1.093 1.509 0.416
GaP Gallium monophosphide rPGa 2.450 2.063 -0.387
GaP Gallium monophosphide rPGa 2.450 2.063 -0.387
GaP Gallium monophosphide rPGa 2.450 2.063 -0.387
GaP Gallium monophosphide rPGa 2.450 2.063 -0.387
CH2CHCH2F Allyl Fluoride rHC 1.130 1.498 0.368
CH2CHCH2F Allyl Fluoride rHC 1.130 1.495 0.365
C4H4N2 Succinonitrile rCH 1.111 1.468 0.357
ONNO NO dimer rNN 2.236 1.885 -0.351
C3H3NO Isoxazole rCH 1.075 1.424 0.349
C4H8S Thiophene, tetrahydro- rCS 1.835 2.167 0.332
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.665 0.325
C4H10O Methyl propyl ether rCH 1.099 1.418 0.319
AlP Aluminum monophosphide rAlP 2.400 2.083 -0.317
AlP Aluminum monophosphide rAlP 2.400 2.083 -0.317
AlP Aluminum monophosphide rAlP 2.400 2.083 -0.317
CH3CH2SH ethanethiol rCC 1.528 1.845 0.317
CaF Calcium monofluoride rFCa 1.967 2.280 0.313
CH3CH2SH ethanethiol rCC 1.528 1.841 0.313
Ar2 Argon diatomic rArAr 3.758 4.070 0.312
CH3CH2SH ethanethiol rCC 1.528 1.840 0.312
Ar2+ Argon diatomic cation rArAr 2.320 2.621 0.301
CH3CH2SH ethanethiol rCS 1.820 1.528 -0.292
CH3CH2SH ethanethiol rCS 1.820 1.528 -0.292
CH3CH2SH ethanethiol rCS 1.820 1.529 -0.291
AlCl Aluminum monochloride rAlCl 2.130 2.420 0.289
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.526 -0.278
CH3SCH2CH3 Ethane, (methylthio)- rCS 1.804 1.528 -0.276
S4 Sulfur tetramer rSS 1.898 2.148 0.250
GaP Gallium monophosphide rPGa 2.450 2.201 -0.249
GaP Gallium monophosphide rPGa 2.450 2.201 -0.249
GaP Gallium monophosphide rPGa 2.450 2.201 -0.249
GaP Gallium monophosphide rPGa 2.450 2.201 -0.249
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.284 0.244
Si2H2 disilyne rSiSi 2.215 1.974 -0.242
C2H2+ acetylene cation rCH 1.077 1.316 0.240
CaO Calcium monoxide rOCa 1.822 2.049 0.227
AsF5 Arsenic pentafluoride rAsF 1.711 1.923 0.212
C4H6 1-Methylcyclopropene rCC 1.300 1.510 0.210
Al2 Aluminum diatomic rAlAl 2.701 2.909 0.208
Si2H2 disilyne rSiH 1.668 1.462 -0.206
NaO sodium monoxide rONa 2.052 1.858 -0.194
Si2 Silicon diatomic rSiSi 2.246 2.056 -0.190
GaP Gallium monophosphide rPGa 2.250 2.063 -0.187
GaP Gallium monophosphide rPGa 2.250 2.063 -0.187
GaP Gallium monophosphide rPGa 2.250 2.063 -0.187
GaP Gallium monophosphide rPGa 2.250 2.063 -0.187
K2 Potassium diatomic rKK 3.905 4.092 0.186
Al2 Aluminum diatomic rAlAl 2.701 2.516 -0.185
S3 Sulfur trimer rSS 1.917 2.101 0.184
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
AlP Aluminum monophosphide rAlP 2.400 2.219 -0.181
ClF3 Chlorine trifluoride rFCl 1.597 1.774 0.177
ClF3 Chlorine trifluoride rFCl 1.597 1.774 0.177
AsF5 Arsenic pentafluoride rAsF 1.656 1.833 0.177
Si2H2 disilyne rSiH 1.668 1.491 -0.177
AlP Aluminum monophosphide rAlP 2.260 2.083 -0.177
AlP Aluminum monophosphide rAlP 2.260 2.083 -0.177
AlP Aluminum monophosphide rAlP 2.260 2.083 -0.177
GaP Gallium monophosphide rPGa 2.240 2.063 -0.177
GaP Gallium monophosphide rPGa 2.240 2.063 -0.177
GaP Gallium monophosphide rPGa 2.240 2.063 -0.177
GaP Gallium monophosphide rPGa 2.240 2.063 -0.177
C4H4N2O2 Uracil rNH 0.836 1.011 0.175
CaS Calcium sulfide rSCa 2.318 2.479 0.162
SiF4 Silicon tetrafluoride rSiF 1.554 1.713 0.159
Li2+ lithium diatomic cation rLiLi 3.112 2.955 -0.157
B2Cl4 Diboron tetrachloride rBB 1.702 1.545 -0.157
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.089 -0.151
C4H4N2O2 Uracil rCH 0.931 1.081 0.150
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
C2Cl4 Tetrachloroethylene rCCl 1.718 1.579 -0.139
BH3NH3 borane ammonia rBH 1.206 1.068 -0.138
C4H4N2O2 Uracil rNH 0.877 1.015 0.138
AlP Aluminum monophosphide rAlP 2.220 2.083 -0.137
AlP Aluminum monophosphide rAlP 2.220 2.083 -0.137
AlP Aluminum monophosphide rAlP 2.220 2.083 -0.137
CaC Calcium monocarbide rCCa 2.302 2.438 0.136
CaOH Calcium monohydroxide rOCa 1.976 2.110 0.134
HOCO+ Hydrocarboxyl cation rCO 1.209 1.340 0.132
B2 Boron diatomic rBB 1.590 1.459 -0.131
B2 Boron diatomic rBB 1.590 1.459 -0.131
ClOOCl Dichlorine dioxide rOCl 1.704 1.576 -0.129
C4H4N2O2 Uracil rCH 0.957 1.085 0.128
CaCl calcium monochloride rClCa 2.437 2.563 0.126
PF3 Phosphorus trifluoride rFP 1.561 1.684 0.123
LiK Lithium Potassium rLiK 3.270 3.388 0.118
CaBr Calcium monobromide rCaBr 2.594 2.709 0.116
C2H4O3 trioxolane124 rCN 1.303 1.418 0.115
N2 Nitrogen diatomic rNN 1.098 1.213 0.115
N2 Nitrogen diatomic rNN 1.098 1.213 0.115
NO3 Nitrogen trioxide rNO 1.238 1.352 0.114
Si2H2 disilyne rSiSi 2.215 2.101 -0.114
CF3 Trifluoromethyl radical rCF 1.318 1.431 0.113
CaH Calcium monohydride rCaH 2.003 2.115 0.113
N2 Nitrogen diatomic rNN 1.213 1.104 -0.108
N2 Nitrogen diatomic rNN 1.213 1.104 -0.108
NF3 Nitrogen trifluoride rNF 1.365 1.472 0.107
C2F4 Tetrafluoroethylene rCF 1.319 1.426 0.107
N2 Nitrogen diatomic rNN 1.213 1.108 -0.104
N2 Nitrogen diatomic rNN 1.213 1.108 -0.104
N2 Nitrogen diatomic rNN 1.213 1.108 -0.104
N2 Nitrogen diatomic rNN 1.213 1.108 -0.104
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.429 0.101
Si2H2 disilyne rSiSi 2.215 2.116 -0.099
ClFO3 Perchloryl fluoride rFCl 1.598 1.693 0.095
Ne2 Neon diatomic rNeNe 3.100 3.005 -0.095
BH3NH3 borane ammonia rBN 1.645 1.551 -0.094
NO3 Nitrogen trioxide rNO 1.238 1.332 0.094
Na2 Sodium diatomic rNaNa 3.079 3.172 0.093
NaLi lithium sodium rLiNa 2.889 2.982 0.093
Ne2+ Neon diatomic cation rNeNe 1.765 1.857 0.092
GaP Gallium monophosphide rPGa 2.110 2.201 0.091
GaP Gallium monophosphide rPGa 2.110 2.201 0.091
GaP Gallium monophosphide rPGa 2.110 2.201 0.091
GaP Gallium monophosphide rPGa 2.110 2.201 0.091
B2 Boron diatomic rBB 1.590 1.499 -0.091
Si2 Silicon diatomic rSiSi 2.246 2.158 -0.088
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.691 0.088
S4 Sulfur tetramer rSS 2.155 2.241 0.086
BC boron monocarbide rBC 1.491 1.407 -0.084
S8 Octasulfur rSS 2.059 1.975 -0.084
AlN Aluminum nitride rNAl 1.786 1.704 -0.083
C3H4O Cyclopropanone rCO 1.191 1.274 0.083
C3H3N3 1,3,5-Triazine rCN 1.338 1.420 0.082
CHCl3 Chloroform rCCl 1.762 1.681 -0.081
Li2 Lithium diatomic rLiLi 2.673 2.753 0.080
KCl Potassium Chloride rKCl 2.667 2.745 0.079
ClF3 Chlorine trifluoride rFCl 1.697 1.774 0.078
ClF3 Chlorine trifluoride rFCl 1.697 1.774 0.078
NO+ nitric oxide cation rNO 1.066 1.141 0.076
SiC silicon monocarbide rCSi 1.722 1.647 -0.075
KF Potassium Fluoride rKF 2.171 2.247 0.075
He2+ helium diatomic cation rHeHe 1.081 1.156 0.075
He2+ helium diatomic cation rHeHe 1.081 1.156 0.075
SiC silicon monocarbide rCSi 1.722 1.647 -0.075
ClNO2 Nitryl chloride rNCl 1.840 1.914 0.074
C2 Carbon diatomic rCC 1.243 1.316 0.074
C2 Carbon diatomic rCC 1.243 1.316 0.073
C3H4O Cyclopropanone rCH 1.086 1.014 -0.072
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.421 -0.072
HOCO+ Hydrocarboxyl cation rCO 1.140 1.210 0.070
FSN Thiazyl fluoride rFS 1.643 1.713 0.070
C4H8O2 Ethyl acetate rCO 1.448 1.517 0.069
B4H10 Tetraborane(10) rHB 1.484 1.415 -0.069
H2Cl+ dihydrogen monochloride cation rHCl 1.321 1.389 0.069
H2Cl+ dihydrogen monochloride cation rHCl 1.321 1.389 0.069
SeO3 selenium trioxide rSeO 1.688 1.620 -0.068
LiCl- lithium chloride anion rLiCl 2.180 2.115 -0.065
BrF5 bromine pentafluoride rFBr 1.689 1.752 0.063
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.094 0.063
C4H10O Ethoxy ethane rCO 1.411 1.474 0.063
FNO Nitrosyl fluoride rNF 1.512 1.449 -0.063
Na2 Sodium diatomic rNaNa 3.079 3.142 0.063
GaCl3 Gallium trichloride rClGa 2.180 2.118 -0.063
BH3NH3 borane ammonia rNH 1.010 0.948 -0.062
FSSF Difluorodisulfane rSS 1.890 1.952 0.062
ClOF3 Chlorine trifluoride oxide rFCl 1.713 1.775 0.062
PCl3 Phosphorus trichloride rPCl 2.043 1.981 -0.062
Si2H2 disilyne rSiH 1.668 1.730 0.062
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.601 0.062
KBr Potassium Bromide rKBr 2.821 2.881 0.061
ClF3 Chlorine trifluoride rFCl 1.597 1.657 0.061
ClF3 Chlorine trifluoride rFCl 1.597 1.657 0.061
NCl nitrogen monochloride rNCl 1.611 1.670 0.059
PF+ phosphorus monofluoride cation rFP 1.500 1.560 0.059
OClO Chlorine dioxide rClO 1.470 1.529 0.059
B4H10 Tetraborane(10) rHB 1.315 1.257 -0.058
C2H2+ acetylene cation rCC 1.253 1.311 0.058
CO Carbon monoxide rCO 1.128 1.186 0.058
ClOOCl Dichlorine dioxide rOO 1.426 1.368 -0.058
CaBr2 Calcium dibromide rCaBr 2.616 2.672 0.056
SF4 Sulfur tetrafluoride rSF 1.545 1.600 0.055
ClFO3 Perchloryl fluoride rClO 1.400 1.455 0.055
PF5 Phosphorus pentafluoride rFP 1.577 1.632 0.055
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.345 -0.055
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.525 -0.055
C2Cl4 Tetrachloroethylene rCC 1.354 1.408 0.054
KOH Potassium hydroxide rOK 2.212 2.266 0.054
CFCl chlorofluoromethylene rCCl 1.714 1.767 0.053
BHCl2 Borane, dichloro- rBH 1.130 1.183 0.053
BrCN Cyanogen bromide rCBr 1.789 1.842 0.053
ClF3 Chlorine trifluoride rFCl 1.697 1.749 0.052
ClF3 Chlorine trifluoride rFCl 1.697 1.749 0.052
C4H6 Methylenecyclopropane rCH 1.088 1.036 -0.052
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
GeF4 Germanium tetrafluoride rFGe 1.670 1.721 0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.832 0.051
SiF+ silicon monofluoride cation rFSi 1.527 1.577 0.051
KOH Potassium hydroxide rOH 0.912 0.963 0.051
C4H6O2 2,3-Butanedione rCC 1.507 1.558 0.051
C4H6O2 2,3-Butanedione rCC 1.507 1.557 0.050
238 molecules.