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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 CID/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 3.453 2.366
Be2 Beryllium diatomic rBeBe 2.460 4.607 2.147
C2H4O3 trioxolane124 rCN 1.303 2.259 0.956
C4H6 1-Methylcyclopropene rCC 1.476 2.276 0.800
C4H6 1-Methylcyclopropene rCH 1.087 1.830 0.743
CH3CH2SH ethanethiol rCH 1.095 1.836 0.741
CH3CH2SH ethanethiol rCH 1.095 1.834 0.739
S4 Sulfur tetramer rSS 2.155 2.871 0.716
HSSSH trisulfane rHS 1.344 2.057 0.714
HSSSH trisulfane rHS 1.344 2.057 0.714
HSSSH trisulfane rHS 1.344 2.057 0.714
HSSSH trisulfane rHS 1.344 2.057 0.714
C4H6 1-Methylcyclopropene rCH 1.098 1.779 0.681
C4H6 1-Methylcyclopropene rCH 1.098 1.768 0.670
Mg2 Magnesium diatomic rMgMg 3.891 4.469 0.578
ONNO NO dimer rNN 2.236 1.751 -0.485
C4H6 1-Methylcyclopropene rCH 1.070 1.539 0.469
CH3CH2SH ethanethiol rCH 1.089 1.547 0.458
CH3CH2SH ethanethiol rCH 1.089 1.544 0.455
CH3CH2SH ethanethiol rCH 1.092 1.547 0.455
CH3CH2SH ethanethiol rCH 1.092 1.544 0.452
C4H10O Methyl propyl ether rCC 1.530 1.093 -0.437
C2H4F2 1,2-difluoroethane rCH 1.093 1.525 0.432
C2H4F2 1,2-difluoroethane rCH 1.093 1.525 0.432
C4H6 1-Methylcyclopropene rCC 1.515 1.084 -0.431
C2H4F2 1,2-difluoroethane rCH 1.093 1.517 0.424
C2H4F2 1,2-difluoroethane rCH 1.093 1.517 0.424
CH3SO2NH2 methanesulfonamide rCN 1.207 1.630 0.423
Be2 Beryllium diatomic rBeBe 2.460 2.051 -0.409
S4 Sulfur tetramer rSS 2.155 2.563 0.408
CH2CHCH2F Allyl Fluoride rHC 1.130 1.510 0.380
CH2CHCH2F Allyl Fluoride rHC 1.130 1.509 0.379
C3H3NO Isoxazole rCH 1.075 1.442 0.367
GaP Gallium monophosphide rPGa 2.450 2.089 -0.361
GaP Gallium monophosphide rPGa 2.450 2.089 -0.361
GaP Gallium monophosphide rPGa 2.450 2.089 -0.361
GaP Gallium monophosphide rPGa 2.450 2.089 -0.361
C4H10O Methyl propyl ether rCH 1.099 1.450 0.351
AlP Aluminum monophosphide rAlP 2.400 2.062 -0.338
AlP Aluminum monophosphide rAlP 2.400 2.062 -0.338
AlP Aluminum monophosphide rAlP 2.400 2.062 -0.338
CH3CH2SH ethanethiol rCC 1.528 1.836 0.308
CH3CH2SH ethanethiol rCC 1.528 1.834 0.306
C2H2+ acetylene cation rCH 1.077 1.367 0.290
K2 Potassium diatomic rKK 3.905 4.187 0.281
CH3CH2SH ethanethiol rCS 1.820 1.544 -0.276
CH3CH2SH ethanethiol rCS 1.820 1.547 -0.273
CaO Calcium monoxide rOCa 1.822 2.095 0.273
CaS Calcium sulfide rSCa 2.318 2.577 0.260
Si2H2 disilyne rSiSi 2.215 1.962 -0.254
Al2 Aluminum diatomic rAlAl 2.701 2.948 0.247
Ar2 Argon diatomic rArAr 3.758 3.999 0.241
C4H6 1-Methylcyclopropene rCC 1.300 1.541 0.241
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.265 0.225
S4 Sulfur tetramer rSS 1.898 2.115 0.217
KCl Potassium Chloride rKCl 2.667 2.883 0.217
CaH Calcium monohydride rCaH 2.003 2.207 0.205
Si2H2 disilyne rSiH 1.668 1.463 -0.205
Si2 Silicon diatomic rSiSi 2.246 2.043 -0.203
Ar2+ Argon diatomic cation rArAr 2.320 2.519 0.199
AlP Aluminum monophosphide rAlP 2.260 2.062 -0.198
AlP Aluminum monophosphide rAlP 2.260 2.062 -0.198
AlP Aluminum monophosphide rAlP 2.260 2.062 -0.198
GaP Gallium monophosphide rPGa 2.450 2.256 -0.194
GaP Gallium monophosphide rPGa 2.450 2.256 -0.194
GaP Gallium monophosphide rPGa 2.450 2.256 -0.194
GaP Gallium monophosphide rPGa 2.450 2.256 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
AlP Aluminum monophosphide rAlP 2.400 2.208 -0.192
LiK Lithium Potassium rLiK 3.270 3.453 0.183
Si2H2 disilyne rSiH 1.668 1.488 -0.180
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.074 -0.166
CaC Calcium monocarbide rCCa 2.302 2.464 0.163
GaP Gallium monophosphide rPGa 2.250 2.089 -0.161
GaP Gallium monophosphide rPGa 2.250 2.089 -0.161
GaP Gallium monophosphide rPGa 2.250 2.089 -0.161
GaP Gallium monophosphide rPGa 2.250 2.089 -0.161
AlP Aluminum monophosphide rAlP 2.220 2.062 -0.158
AlP Aluminum monophosphide rAlP 2.220 2.062 -0.158
AlP Aluminum monophosphide rAlP 2.220 2.062 -0.158
S3 Sulfur trimer rSS 1.917 2.071 0.154
N2 Nitrogen diatomic rNN 1.098 1.249 0.152
N2 Nitrogen diatomic rNN 1.098 1.249 0.152
GaP Gallium monophosphide rPGa 2.240 2.089 -0.151
GaP Gallium monophosphide rPGa 2.240 2.089 -0.151
GaP Gallium monophosphide rPGa 2.240 2.089 -0.151
GaP Gallium monophosphide rPGa 2.240 2.089 -0.151
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.509 0.150
GaP Gallium monophosphide rPGa 2.110 2.256 0.146
GaP Gallium monophosphide rPGa 2.110 2.256 0.146
GaP Gallium monophosphide rPGa 2.110 2.256 0.146
GaP Gallium monophosphide rPGa 2.110 2.256 0.146
KH Potassium hydride rKH 2.243 2.387 0.144
KH Potassium hydride rKH 2.243 2.387 0.144
ClF3 Chlorine trifluoride rFCl 1.597 1.741 0.144
ClF3 Chlorine trifluoride rFCl 1.597 1.741 0.144
Si2H2 disilyne rSiSi 2.215 2.081 -0.135
Si2H2 disilyne rSiSi 2.215 2.091 -0.125
CaBr Calcium monobromide rCaBr 2.594 2.716 0.122
CuF Copper monofluoride rCuF 1.745 1.627 -0.118
CrH Chromium hydride rHCr 1.655 1.772 0.117
Ne2 Neon diatomic rNeNe 3.100 2.987 -0.113
S4 Sulfur tetramer rSS 2.155 2.043 -0.112
SiP Silicon monophosphide rSiP 2.078 1.967 -0.110
NCl nitrogen monochloride rNCl 1.611 1.718 0.107
NCl nitrogen monochloride rNCl 1.611 1.718 0.107
O2 Oxygen diatomic rOO 1.208 1.314 0.107
Na2 Sodium diatomic rNaNa 3.079 3.181 0.102
Na2 Sodium diatomic rNaNa 3.079 3.181 0.102
N2 Nitrogen diatomic rNN 1.213 1.111 -0.101
N2 Nitrogen diatomic rNN 1.213 1.111 -0.101
N2 Nitrogen diatomic rNN 1.213 1.111 -0.101
N2 Nitrogen diatomic rNN 1.213 1.111 -0.101
NBr nitrogen monobromide rNBr 1.765 1.862 0.097
AlN Aluminum nitride rNAl 1.786 1.691 -0.095
OH- hydroxide anion rOH 0.964 1.058 0.094
OH- hydroxide anion rOH 0.964 1.058 0.094
Ne2+ Neon diatomic cation rNeNe 1.765 1.672 -0.093
NaK Sodium Potassium rNaK 3.589 3.681 0.092
N2O4 Dinitrogen tetroxide rNN 1.782 1.691 -0.091
O2 Oxygen diatomic rOO 1.208 1.298 0.090
CH3OCl methyl hypochlorite rCO 1.389 1.479 0.090
NaLi lithium sodium rLiNa 2.889 2.978 0.089
NaLi lithium sodium rLiNa 2.889 2.978 0.089
He2+ helium diatomic cation rHeHe 1.081 1.169 0.088
He2+ helium diatomic cation rHeHe 1.081 1.169 0.088
KBr Potassium Bromide rKBr 2.821 2.907 0.086
HO2 Hydroperoxy radical rOO 1.331 1.416 0.086
HO2 Hydroperoxy radical rOO 1.331 1.416 0.086
BC boron monocarbide rBC 1.491 1.406 -0.086
CuCl Copper monochloride rCuCl 2.051 1.966 -0.085
BC boron monocarbide rBC 1.491 1.576 0.085
F2+ flourine diatomic cation rFF 1.322 1.405 0.083
F2+ flourine diatomic cation rFF 1.322 1.405 0.083
C2 Carbon diatomic rCC 1.243 1.325 0.083
C2 Carbon diatomic rCC 1.243 1.325 0.083
BrO Bromine monoxide rOBr 1.718 1.800 0.082
NaF sodium fluoride rNaF 1.926 1.845 -0.081
CO Carbon monoxide rCO 1.128 1.208 0.080
O2+ diatomic oxygen cation rOO 1.116 1.196 0.080
O2+ diatomic oxygen cation rOO 1.116 1.196 0.080
C4H8O2 Ethyl acetate rCO 1.448 1.527 0.079
C2H2N2O Furazan rNO 1.373 1.451 0.078
O2- oxygen diatomic anion rOO 1.350 1.428 0.078
O2- oxygen diatomic anion rOO 1.350 1.428 0.078
CFCl chlorofluoromethylene rCCl 1.714 1.792 0.078
ClO Monochlorine monoxide rClO 1.596 1.673 0.077
NO- nitric oxide anion rNO 1.258 1.333 0.075
SeO3 selenium trioxide rSeO 1.688 1.613 -0.075
ZnS Zinc sulfide rSZn 2.046 1.972 -0.075
LiH Lithium Hydride rLiH 1.595 1.669 0.075
C2H2+ acetylene cation rCC 1.253 1.327 0.074
NO- nitric oxide anion rNO 1.258 1.330 0.072
NO- nitric oxide anion rNO 1.258 1.330 0.072
KOH Potassium hydroxide rOH 0.912 0.984 0.072
SiC silicon monocarbide rCSi 1.722 1.650 -0.072
SiC silicon monocarbide rCSi 1.722 1.650 -0.072
C2H4O Ethylene oxide rCO 1.425 1.497 0.072
C5H6 Propellane rCC 1.596 1.667 0.071
CH2N2 diazirine rCN 1.482 1.552 0.070
NF3 Nitrogen trifluoride rNF 1.365 1.435 0.070
CH3CH2O Ethoxy radical rCO 1.388 1.458 0.070
CH2NOH formaldoxime rNO 1.408 1.478 0.070
CH3CHNOH Acetaldoxime rNO 1.408 1.478 0.070
CH2O2 Dioxirane rCO 1.388 1.457 0.069
HCNO fulminic acid rNO 1.199 1.267 0.068
ClOOCl Dichlorine dioxide rOO 1.426 1.494 0.068
H2O3 Hydrogen trioxide rOO 1.428 1.496 0.068
LiCl lithium chloride rLiCl 2.021 2.089 0.068
HCNO fulminic acid rNO 1.199 1.267 0.068
HCNO fulminic acid rNO 1.199 1.267 0.068
CH3OCl methyl hypochlorite rOCl 1.674 1.741 0.067
SiP Silicon monophosphide rSiP 2.078 2.010 -0.067
NF nitrogen fluoride rNF 1.317 1.383 0.066
O3 Ozone rOO 1.278 1.344 0.066
TiCl Titanium Monochloride rClTi 2.265 2.331 0.066
LiS Lithium monosulfide rLiS 2.150 2.215 0.065
LiI Lithium Iodide rLiI 2.392 2.457 0.065
VO Vanadium monoxide rVO 1.589 1.527 -0.062
MgF2 Magnesium fluoride rFMg 1.770 1.709 -0.061
NaH sodium hydride rNaH 1.887 1.947 0.061
CBr Carbon monobromide rCBr 1.821 1.881 0.060
NCl nitrogen monochloride rNCl 1.611 1.671 0.060
B4H10 Tetraborane(10) rHB 1.315 1.255 -0.060
B2 Boron diatomic rBB 1.590 1.650 0.060
CH3I methyl iodide rCI 2.136 2.195 0.059
CH3I methyl iodide rCI 2.136 2.195 0.059
BeCl2 Beryllium chloride rBeCl 1.750 1.808 0.058
C3H8O2 1,3-Propanediol rCO 1.410 1.468 0.058
Li2 Lithium diatomic rLiLi 2.673 2.731 0.058
Si2H2 disilyne rSiH 1.668 1.725 0.057
HN3 hydrogen azide rNH 0.975 1.032 0.057
HN3 hydrogen azide rNH 0.975 1.032 0.057
SeO Selenium monoxide rSeO 1.639 1.697 0.057
CF2 Difluoromethylene rCF 1.297 1.354 0.057
HCF Fluoromethylene rCF 1.305 1.362 0.057
HCF Fluoromethylene rCF 1.305 1.362 0.057
HNO Nitrosyl hydride rNO 1.209 1.266 0.057
CH2FI fluoroiodomethane rCI 2.140 2.196 0.057
NH2OH hydroxylamine rNO 1.453 1.510 0.057
NH2OH hydroxylamine rNO 1.453 1.510 0.057
NHF2 difluoramine rNF 1.400 1.456 0.056
BH3NH3 borane ammonia rBN 1.645 1.701 0.056
N2O Nitrous oxide rNO 1.184 1.240 0.056
ZnCN Zinc monocyanide rCZn 1.950 1.894 -0.055
NaO sodium monoxide rONa 2.052 1.996 -0.055
C2H5NO3 Nitric acid, ethyl ester rCO 1.430 1.485 0.055
GaCl3 Gallium trichloride rClGa 2.180 2.126 -0.055
GaCl3 Gallium trichloride rClGa 2.180 2.126 -0.055
BH3CO Borane carbonyl rBC 1.534 1.588 0.054
BH3CO Borane carbonyl rBC 1.534 1.588 0.054
ICl Iodine monochloride rClI 2.321 2.375 0.054
CH2CHCH2F Allyl Fluoride rCF 1.370 1.424 0.054
CH2CHCH2F Allyl Fluoride rCF 1.370 1.424 0.054
BH3NH3 borane ammonia rBN 1.645 1.699 0.053
MgH+ magnesium monohydride cation rMgH 1.652 1.704 0.052
CH2O2 Dioxirane rOO 1.516 1.568 0.052
HOCl hypochlorous acid rClO 1.697 1.749 0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
AlP Aluminum monophosphide rAlP 2.260 2.208 -0.052
ClF Chlorine monofluoride rFCl 1.628 1.680 0.052
SO Sulfur monoxide rSO 1.481 1.533 0.051
SO Sulfur monoxide rSO 1.481 1.533 0.051
SO Sulfur monoxide rSO 1.481 1.533 0.051
SO Sulfur monoxide rSO 1.481 1.533 0.051
ICN Cyanogen iodide rCI 1.992 2.043 0.051
B4H10 Tetraborane(10) rHB 1.484 1.433 -0.051
HCF Fluoromethylene rCH 1.138 1.087 -0.051
HCF Fluoromethylene rCH 1.138 1.087 -0.051
CH2CHCH2F Allyl Fluoride rCF 1.370 1.420 0.050
CH2CHCH2F Allyl Fluoride rCF 1.370 1.420 0.050
240 molecules.