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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 QCISD/6-31G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.228 3.143
CH3CH2SH ethanethiol rCH 1.092 3.735 2.643
CH3CH2SH ethanethiol rCH 1.092 3.735 2.643
C4H6 1-Methylcyclopropene rCH 1.087 3.432 2.345
Be2 Beryllium diatomic rBeBe 2.460 4.644 2.184
H2SO4 Sulfuric acid rOH 0.970 2.851 1.881
ClS2 Sulfur chloride rSS 1.906 3.511 1.605
Mg2 Magnesium diatomic rMgMg 3.891 2.595 -1.296
Mg2 Magnesium diatomic rMgMg 3.891 2.595 -1.296
HBO Boron hydride oxide rBO 1.200 2.389 1.189
CH3CH2SH ethanethiol rSH 1.322 2.426 1.104
CH3CH2SH ethanethiol rSH 1.322 2.426 1.104
CH3CH2SH ethanethiol rSH 1.322 2.426 1.104
CH3CH2SH ethanethiol rSH 1.322 2.426 1.104
CH3CH2SH ethanethiol rSH 1.336 2.426 1.090
CH3CH2SH ethanethiol rSH 1.336 2.426 1.090
CH3CH2SH ethanethiol rSH 1.336 2.426 1.090
CH3CH2SH ethanethiol rSH 1.336 2.426 1.090
CH3CH2SH ethanethiol rCH 1.090 2.176 1.086
CH3CH2SH ethanethiol rCH 1.090 2.176 1.086
CH3CH2SH ethanethiol rCH 1.091 2.176 1.085
CH3CH2SH ethanethiol rCH 1.091 2.176 1.085
C2H4O3 trioxolane124 rCN 1.303 2.193 0.889
C4H6 1-Methylcyclopropene rCC 1.476 2.266 0.790
C4H6 1-Methylcyclopropene rCH 1.087 1.828 0.741
CH3CH2SH ethanethiol rCH 1.095 1.832 0.737
CH3CH2SH ethanethiol rCH 1.095 1.832 0.737
HSSSH trisulfane rHS 1.344 2.080 0.736
HSSSH trisulfane rHS 1.344 2.080 0.736
S4 Sulfur tetramer rSS 2.155 2.891 0.736
CH3CH2SH ethanethiol rCH 1.095 1.831 0.736
HSSSH trisulfane rHS 1.344 2.079 0.736
HSSSH trisulfane rHS 1.344 2.079 0.736
CH3CH2SH ethanethiol rCH 1.095 1.828 0.733
C4H6 1-Methylcyclopropene rCH 1.098 1.783 0.685
C4H6 1-Methylcyclopropene rCH 1.098 1.769 0.671
Be2 Beryllium diatomic rBeBe 2.460 1.800 -0.660
Ne2 Neon diatomic rNeNe 3.100 2.599 -0.501
CH3SO2NH2 methanesulfonamide rCN 1.207 1.684 0.477
Ar2 Argon diatomic rArAr 3.758 4.215 0.457
ONNO NO dimer rNN 2.236 1.780 -0.456
S4 Sulfur tetramer rSS 2.155 2.604 0.449
C4H6 1-Methylcyclopropene rCH 1.070 1.510 0.440
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
CH3CH2SH ethanethiol rCH 1.089 1.527 0.438
CH3CH2SH ethanethiol rCH 1.089 1.527 0.438
CH3CH2SH ethanethiol rCH 1.089 1.527 0.438
CH3CH2SH ethanethiol rCH 1.089 1.526 0.437
CH3CH2SH ethanethiol rCH 1.092 1.527 0.435
CH3CH2SH ethanethiol rCH 1.092 1.527 0.435
CH3CH2SH ethanethiol rCH 1.092 1.527 0.435
CH3CH2SH ethanethiol rCH 1.092 1.526 0.434
C4H10O Methyl propyl ether rCC 1.530 1.098 -0.432
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C4H6 1-Methylcyclopropene rCC 1.515 1.096 -0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.506 0.413
C2H4F2 1,2-difluoroethane rCH 1.093 1.506 0.413
CH2CHCH2F Allyl Fluoride rHC 1.130 1.501 0.371
CH2CHCH2F Allyl Fluoride rHC 1.130 1.498 0.368
C3H3NO Isoxazole rCH 1.075 1.429 0.354
GaP Gallium monophosphide rPGa 2.450 2.129 -0.321
GaP Gallium monophosphide rPGa 2.450 2.129 -0.321
GaP Gallium monophosphide rPGa 2.450 2.129 -0.321
GaP Gallium monophosphide rPGa 2.450 2.129 -0.321
C4H10O Methyl propyl ether rCH 1.099 1.416 0.317
CH3CH2SH ethanethiol rCC 1.528 1.832 0.304
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 1.526 -0.294
CH3CH2SH ethanethiol rCS 1.820 1.527 -0.293
CH3CH2SH ethanethiol rCS 1.820 1.527 -0.293
CH3CH2SH ethanethiol rCS 1.820 1.527 -0.293
AlP Aluminum monophosphide rAlP 2.400 2.112 -0.288
AlP Aluminum monophosphide rAlP 2.400 2.112 -0.288
AlP Aluminum monophosphide rAlP 2.400 2.112 -0.288
Al2 Aluminum diatomic rAlAl 2.701 2.962 0.261
S4 Sulfur tetramer rSS 1.898 2.136 0.238
C2H2+ acetylene cation rCH 1.077 1.312 0.235
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.271 0.231
Si2H2 disilyne rSiSi 2.215 1.990 -0.225
C4H6 1-Methylcyclopropene rCC 1.300 1.511 0.211
Ar2+ Argon diatomic cation rArAr 2.320 2.526 0.206
CaS Calcium sulfide rSCa 2.318 2.523 0.205
Al2 Aluminum diatomic rAlAl 2.701 2.497 -0.204
Al2 Aluminum diatomic rAlAl 2.701 2.497 -0.204
Si2H2 disilyne rSiH 1.668 1.472 -0.196
GaP Gallium monophosphide rPGa 2.450 2.257 -0.193
GaP Gallium monophosphide rPGa 2.450 2.257 -0.193
GaP Gallium monophosphide rPGa 2.450 2.257 -0.193
GaP Gallium monophosphide rPGa 2.450 2.257 -0.193
K2 Potassium diatomic rKK 3.905 4.096 0.191
B2 Boron diatomic rBB 1.590 1.407 -0.183
S3 Sulfur trimer rSS 1.917 2.096 0.179
Si2H2 disilyne rSiH 1.668 1.499 -0.169
Si2 Silicon diatomic rSiSi 2.246 2.083 -0.163
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
AlP Aluminum monophosphide rAlP 2.400 2.238 -0.162
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.082 -0.158
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.515 0.156
CrH Chromium hydride rHCr 1.655 1.810 0.155
ClF3 Chlorine trifluoride rFCl 1.597 1.750 0.153
ClF3 Chlorine trifluoride rFCl 1.597 1.750 0.153
CaH Calcium monohydride rCaH 2.003 2.152 0.150
CaH Calcium monohydride rCaH 2.003 2.152 0.150
AlP Aluminum monophosphide rAlP 2.260 2.112 -0.148
AlP Aluminum monophosphide rAlP 2.260 2.112 -0.148
AlP Aluminum monophosphide rAlP 2.260 2.112 -0.148
GaP Gallium monophosphide rPGa 2.110 2.257 0.147
GaP Gallium monophosphide rPGa 2.110 2.257 0.147
GaP Gallium monophosphide rPGa 2.110 2.257 0.147
GaP Gallium monophosphide rPGa 2.110 2.257 0.147
CaCl calcium monochloride rClCa 2.437 2.569 0.132
CuCl Copper monochloride rCuCl 2.051 2.183 0.132
N2 Nitrogen diatomic rNN 1.098 1.227 0.129
N2 Nitrogen diatomic rNN 1.098 1.227 0.129
GaP Gallium monophosphide rPGa 2.250 2.129 -0.121
GaP Gallium monophosphide rPGa 2.250 2.129 -0.121
GaP Gallium monophosphide rPGa 2.250 2.129 -0.121
GaP Gallium monophosphide rPGa 2.250 2.129 -0.121
CaBr Calcium monobromide rCaBr 2.594 2.712 0.119
PF3 Phosphorus trifluoride rFP 1.561 1.677 0.116
CaC Calcium monocarbide rCCa 2.302 2.415 0.113
GaP Gallium monophosphide rPGa 2.240 2.129 -0.111
GaP Gallium monophosphide rPGa 2.240 2.129 -0.111
GaP Gallium monophosphide rPGa 2.240 2.129 -0.111
GaP Gallium monophosphide rPGa 2.240 2.129 -0.111
AlP Aluminum monophosphide rAlP 2.220 2.112 -0.108
AlP Aluminum monophosphide rAlP 2.220 2.112 -0.108
AlP Aluminum monophosphide rAlP 2.220 2.112 -0.108
NaO sodium monoxide rONa 2.052 1.944 -0.108
NaO sodium monoxide rONa 2.052 1.944 -0.108
KH Potassium hydride rKH 2.243 2.347 0.104
KH Potassium hydride rKH 2.243 2.347 0.104
NF3 Nitrogen trifluoride rNF 1.365 1.468 0.103
N2O3 Dinitrogen trioxide rNN 1.864 1.761 -0.103
LiK Lithium Potassium rLiK 3.270 3.371 0.101
CuO Copper Monoxide rCuO 1.724 1.625 -0.100
CaOH Calcium monohydroxide rOCa 1.976 2.075 0.099
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
N2 Nitrogen diatomic rNN 1.213 1.115 -0.098
CO Carbon monoxide rCO 1.128 1.223 0.095
Si2H2 disilyne rSiSi 2.215 2.122 -0.093
BrO+ Bromine monoxide cation rOBr 1.635 1.727 0.092
N2O4 Dinitrogen tetroxide rNN 1.782 1.691 -0.091
Si2H2 disilyne rSiSi 2.215 2.125 -0.090
Na2 Sodium diatomic rNaNa 3.079 3.164 0.085
Na2 Sodium diatomic rNaNa 3.079 3.164 0.085
Na2 Sodium diatomic rNaNa 3.079 3.164 0.085
C3H4O Cyclopropanone rCO 1.191 1.275 0.084
He2+ helium diatomic cation rHeHe 1.081 1.163 0.082
He2+ helium diatomic cation rHeHe 1.081 1.163 0.082
CHCl3 Chloroform rCCl 1.762 1.681 -0.081
C2 Carbon diatomic rCC 1.243 1.322 0.079
C2 Carbon diatomic rCC 1.243 1.322 0.079
CaF Calcium monofluoride rFCa 1.967 2.044 0.077
KCl Potassium Chloride rKCl 2.667 2.743 0.077
SeO3 selenium trioxide rSeO 1.688 1.612 -0.076
FNO Nitrosyl fluoride rNF 1.512 1.439 -0.073
C3H4O Cyclopropanone rCH 1.086 1.013 -0.073
SiP Silicon monophosphide rSiP 2.078 2.005 -0.072
Si2H2 disilyne rSiH 1.668 1.740 0.072
NBr nitrogen monobromide rNBr 1.765 1.836 0.071
TiH Titanium monohydride rHTi 1.785 1.855 0.070
B4H10 Tetraborane(10) rHB 1.484 1.414 -0.070
LiO lithium oxide rLiO 1.688 1.619 -0.069
LiO lithium oxide rLiO 1.688 1.619 -0.069
ClSSCl Disulfur dichloride rSS 1.931 1.999 0.068
AlN Aluminum nitride rNAl 1.786 1.719 -0.068
C4H8O2 Ethyl acetate rCO 1.448 1.515 0.067
SiC silicon monocarbide rCSi 1.722 1.655 -0.067
SiC silicon monocarbide rCSi 1.722 1.655 -0.067
SF Monosulfur monofluoride rSF 1.599 1.666 0.066
BN boron nitride rBN 1.325 1.259 -0.066
BN boron nitride rBN 1.325 1.259 -0.066
PCl3 Phosphorus trichloride rPCl 2.043 1.978 -0.065
NaLi lithium sodium rLiNa 2.889 2.953 0.064
NaLi lithium sodium rLiNa 2.889 2.953 0.064
BrO Bromine monoxide rOBr 1.718 1.781 0.063
B2 Boron diatomic rBB 1.590 1.527 -0.063
B2 Boron diatomic rBB 1.590 1.527 -0.063
Li2 Lithium diatomic rLiLi 2.673 2.734 0.061
Li2 Lithium diatomic rLiLi 2.673 2.734 0.061
B4H10 Tetraborane(10) rHB 1.315 1.255 -0.060
LiH Lithium Hydride rLiH 1.595 1.653 0.059
LiH Lithium Hydride rLiH 1.595 1.653 0.059
BHCl2 Borane, dichloro- rBH 1.130 1.188 0.058
C2H2+ acetylene cation rCC 1.253 1.310 0.058
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.523 -0.057
CaBr2 Calcium dibromide rCaBr 2.616 2.673 0.057
Li2+ lithium diatomic cation rLiLi 3.112 3.167 0.056
Ne2+ Neon diatomic cation rNeNe 1.765 1.710 -0.055
BrCl Bromine monochloride rClBr 2.136 2.190 0.054
HClO4 perchloric acid rOCl 1.404 1.458 0.054
FSSF Difluorodisulfane rSS 1.890 1.944 0.054
KOH Potassium hydroxide rOH 0.912 0.966 0.054
LiH Lithium Hydride rLiH 1.595 1.649 0.054
ClF3 Chlorine trifluoride rFCl 1.697 1.750 0.053
ClF3 Chlorine trifluoride rFCl 1.697 1.750 0.053
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.348 -0.052
GeF+ Germanium monofluoride cation rFGe 1.665 1.718 0.052
CH3CHNOH Acetaldoxime rCC 1.550 1.498 -0.052
C4H6 Methylenecyclopropane rCH 1.088 1.036 -0.052
MgO magnesium oxide rMgO 1.749 1.801 0.052
TiCl Titanium Monochloride rClTi 2.265 2.317 0.052
GeO Germanium monoxide rOGe 1.625 1.676 0.051
OClO Chlorine dioxide rClO 1.470 1.521 0.051
OClO Chlorine dioxide rClO 1.470 1.521 0.051
NaH sodium hydride rNaH 1.887 1.938 0.051
NaH sodium hydride rNaH 1.887 1.938 0.051
ClS2 Sulfur chloride rSCl 2.071 2.020 -0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
TiO Titanium monoxide rO=Ti 1.620 1.670 0.050
222 molecules.