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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 CCD/6-31G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.224 3.139
C4H6 1-Methylcyclopropene rCH 1.087 3.429 2.342
C4H10O Propane, 2-methoxy- rCC 1.519 3.782 2.263
Be2 Beryllium diatomic rBeBe 2.460 4.689 2.229
H2SO4 Sulfuric acid rOH 0.970 2.870 1.900
C4H8S Thiophene, tetrahydro- rCC 1.532 3.401 1.869
C4H10O Propane, 2-methoxy- rCO 1.422 3.071 1.649
C4H10O Propane, 2-methoxy- rCH 1.090 2.540 1.450
C4H8S Thiophene, tetrahydro- rCH 1.117 2.448 1.331
Mg2 Magnesium diatomic rMgMg 3.891 2.575 -1.315
Mg2 Magnesium diatomic rMgMg 3.891 2.575 -1.315
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.424 1.307
C4H10O Propane, 2-methoxy- rCC 1.528 2.787 1.259
HBO Boron hydride oxide rBO 1.200 2.381 1.181
C2H4O3 trioxolane124 rCN 1.303 2.188 0.885
C4H6 1-Methylcyclopropene rCC 1.476 2.264 0.788
C4H6 1-Methylcyclopropene rCH 1.087 1.827 0.740
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
HSSSH trisulfane rHS 1.344 2.077 0.734
HSSSH trisulfane rHS 1.344 2.077 0.734
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
S4 Sulfur tetramer rSS 2.155 2.889 0.734
HSSSH trisulfane rHS 1.344 2.077 0.733
HSSSH trisulfane rHS 1.344 2.077 0.733
CH3CH2SH ethanethiol rCH 1.095 1.826 0.731
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.174 0.728
C4H6 1-Methylcyclopropene rCH 1.098 1.782 0.684
C4H10O Propane, 2-methoxy- rCH 1.095 1.769 0.674
C4H6 1-Methylcyclopropene rCH 1.098 1.768 0.670
Be2 Beryllium diatomic rBeBe 2.460 1.791 -0.669
ONNO NO dimer rNN 2.236 1.734 -0.502
Ne2 Neon diatomic rNeNe 3.100 2.605 -0.495
CH3SO2NH2 methanesulfonamide rCN 1.207 1.678 0.471
C4H4N2 Succinonitrile rCC 1.561 1.096 -0.465
Ar2 Argon diatomic rArAr 3.758 4.222 0.464
Be2 Beryllium diatomic rBeBe 2.460 2.011 -0.449
S4 Sulfur tetramer rSS 2.155 2.597 0.442
C4H6 1-Methylcyclopropene rCH 1.070 1.508 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 1.089 1.525 0.436
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
CH3CH2SH ethanethiol rCH 1.092 1.525 0.433
C4H10O Methyl propyl ether rCC 1.530 1.097 -0.433
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 1.095 -0.420
C4H4N2 Succinonitrile rCH 1.123 1.541 0.418
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 1.500 0.370
CH2CHCH2F Allyl Fluoride rHC 1.130 1.497 0.367
C4H4N2 Succinonitrile rCH 1.111 1.471 0.360
C4H8S Thiophene, tetrahydro- rCS 1.835 2.194 0.359
C3H3NO Isoxazole rCH 1.075 1.428 0.353
GaP Gallium monophosphide rPGa 2.450 2.099 -0.351
GaP Gallium monophosphide rPGa 2.450 2.099 -0.351
GaP Gallium monophosphide rPGa 2.450 2.099 -0.351
GaP Gallium monophosphide rPGa 2.450 2.099 -0.351
AlP Aluminum monophosphide rAlP 2.400 2.074 -0.326
AlP Aluminum monophosphide rAlP 2.400 2.074 -0.326
AlP Aluminum monophosphide rAlP 2.400 2.074 -0.326
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
C4H10O Propane, 2-methoxy- rCH 1.095 1.417 0.322
C4H10O Methyl propyl ether rCH 1.099 1.414 0.315
CaO Calcium monoxide rOCa 1.822 2.124 0.302
CaO Calcium monoxide rOCa 1.822 2.124 0.302
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
CH3CH2SH ethanethiol rCC 1.528 1.826 0.298
CH3CH2SH ethanethiol rCS 1.820 1.525 -0.295
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
FOO Dioxygen monofluoride radical rFO 1.649 1.386 -0.263
Al2 Aluminum diatomic rAlAl 2.701 2.957 0.256
S4 Sulfur tetramer rSS 1.898 2.132 0.234
C2H2+ acetylene cation rCH 1.077 1.308 0.232
Si2H2 disilyne rSiSi 2.215 1.984 -0.231
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.269 0.229
C4H6 1-Methylcyclopropene rCC 1.300 1.510 0.210
Al2 Aluminum diatomic rAlAl 2.701 2.494 -0.208
Al2 Aluminum diatomic rAlAl 2.701 2.494 -0.208
GaP Gallium monophosphide rPGa 2.450 2.247 -0.203
GaP Gallium monophosphide rPGa 2.450 2.247 -0.203
GaP Gallium monophosphide rPGa 2.450 2.247 -0.203
GaP Gallium monophosphide rPGa 2.450 2.247 -0.203
C2H6O2S Dimethyl sulfone rSO 1.431 1.634 0.203
Ar2+ Argon diatomic cation rArAr 2.320 2.523 0.203
C2H6O2S Dimethyl sulfone rCS 1.777 1.575 -0.202
CaS Calcium sulfide rSCa 2.318 2.519 0.202
Si2H2 disilyne rSiH 1.668 1.472 -0.196
B2 Boron diatomic rBB 1.590 1.398 -0.192
AlP Aluminum monophosphide rAlP 2.260 2.074 -0.186
AlP Aluminum monophosphide rAlP 2.260 2.074 -0.186
AlP Aluminum monophosphide rAlP 2.260 2.074 -0.186
S3 Sulfur trimer rSS 1.917 2.093 0.176
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
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
Si2 Silicon diatomic rSiSi 2.246 2.073 -0.173
Si2H2 disilyne rSiH 1.668 1.499 -0.169
K2 Potassium diatomic rKK 3.905 4.069 0.164
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.080 -0.160
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.515 0.156
GaP Gallium monophosphide rPGa 2.250 2.099 -0.151
GaP Gallium monophosphide rPGa 2.250 2.099 -0.151
GaP Gallium monophosphide rPGa 2.250 2.099 -0.151
GaP Gallium monophosphide rPGa 2.250 2.099 -0.151
CrH Chromium hydride rHCr 1.655 1.805 0.150
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
FO Oxygen monofluoride rFO 1.354 1.502 0.147
FO Oxygen monofluoride rFO 1.354 1.502 0.147
AlP Aluminum monophosphide rAlP 2.220 2.074 -0.146
AlP Aluminum monophosphide rAlP 2.220 2.074 -0.146
AlP Aluminum monophosphide rAlP 2.220 2.074 -0.146
CaH Calcium monohydride rCaH 2.003 2.144 0.142
CaH Calcium monohydride rCaH 2.003 2.144 0.142
NO3 Nitrogen trioxide rNO 1.238 1.379 0.141
ClF3 Chlorine trifluoride rFCl 1.597 1.738 0.141
ClF3 Chlorine trifluoride rFCl 1.597 1.738 0.141
GaP Gallium monophosphide rPGa 2.240 2.099 -0.141
GaP Gallium monophosphide rPGa 2.240 2.099 -0.141
GaP Gallium monophosphide rPGa 2.240 2.099 -0.141
GaP Gallium monophosphide rPGa 2.240 2.099 -0.141
GaP Gallium monophosphide rPGa 2.110 2.247 0.137
GaP Gallium monophosphide rPGa 2.110 2.247 0.137
GaP Gallium monophosphide rPGa 2.110 2.247 0.137
GaP Gallium monophosphide rPGa 2.110 2.247 0.137
CaCl calcium monochloride rClCa 2.437 2.567 0.131
N2O3 Dinitrogen trioxide rNN 1.864 1.734 -0.130
CaCl calcium monochloride rClCa 2.437 2.561 0.124
N2 Nitrogen diatomic rNN 1.098 1.219 0.122
N2 Nitrogen diatomic rNN 1.098 1.219 0.122
CaBr Calcium monobromide rCaBr 2.594 2.712 0.119
PF3 Phosphorus trifluoride rFP 1.561 1.676 0.115
NaO sodium monoxide rONa 2.052 1.939 -0.113
NaO sodium monoxide rONa 2.052 1.939 -0.113
Si2H2 disilyne rSiSi 2.215 2.107 -0.109
CaC Calcium monocarbide rCCa 2.302 2.408 0.106
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
N2 Nitrogen diatomic rNN 1.213 1.112 -0.101
BC boron monocarbide rBC 1.491 1.391 -0.100
AlN Aluminum nitride rNAl 1.786 1.687 -0.099
NF3 Nitrogen trifluoride rNF 1.365 1.464 0.099
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.426 0.097
Si2H2 disilyne rSiSi 2.215 2.118 -0.097
N2O4 Dinitrogen tetroxide rNN 1.782 1.686 -0.096
CaOH Calcium monohydroxide rOCa 1.976 2.072 0.096
LiK Lithium Potassium rLiK 3.270 3.364 0.094
KH Potassium hydride rKH 2.243 2.336 0.094
KH Potassium hydride rKH 2.243 2.336 0.094
SiP Silicon monophosphide rSiP 2.078 1.988 -0.090
SeO3 selenium trioxide rSeO 1.688 1.599 -0.088
KCl Potassium Chloride rKCl 2.667 2.752 0.085
NaLi lithium sodium rLiNa 2.889 2.974 0.085
CuF Copper monofluoride rCuF 1.745 1.663 -0.082
FNO Nitrosyl fluoride rNF 1.512 1.430 -0.082
CHCl3 Chloroform rCCl 1.762 1.680 -0.082
C3H4O Cyclopropanone rCO 1.191 1.272 0.081
He2+ helium diatomic cation rHeHe 1.081 1.162 0.081
He2+ helium diatomic cation rHeHe 1.081 1.162 0.081
Na2 Sodium diatomic rNaNa 3.079 3.158 0.080
Na2 Sodium diatomic rNaNa 3.079 3.158 0.080
KCl Potassium Chloride rKCl 2.667 2.743 0.076
VO Vanadium monoxide rVO 1.589 1.515 -0.074
CuF Copper monofluoride rCuF 1.745 1.671 -0.074
CaF Calcium monofluoride rFCa 1.967 2.041 0.074
LiO lithium oxide rLiO 1.688 1.615 -0.073
LiO lithium oxide rLiO 1.688 1.615 -0.073
C3H4O Cyclopropanone rCH 1.086 1.013 -0.073
C2 Carbon diatomic rCC 1.243 1.314 0.072
C2 Carbon diatomic rCC 1.243 1.314 0.072
N2O3 Dinitrogen trioxide rNN 1.864 1.793 -0.071
ClSSCl Disulfur dichloride rSS 1.931 2.002 0.071
Si2H2 disilyne rSiH 1.668 1.738 0.070
B4H10 Tetraborane(10) rHB 1.484 1.415 -0.069
TiH Titanium monohydride rHTi 1.785 1.854 0.069
LiK Lithium Potassium rLiK 3.270 3.339 0.069
C4H8O2 Ethyl acetate rCO 1.448 1.515 0.067
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.425 -0.067
B2 Boron diatomic rBB 1.590 1.523 -0.067
B2 Boron diatomic rBB 1.590 1.523 -0.067
PCl3 Phosphorus trichloride rPCl 2.043 1.977 -0.066
FSSF Difluorodisulfane rSS 1.890 1.956 0.066
SiP Silicon monophosphide rSiP 2.078 2.016 -0.062
NaLi lithium sodium rLiNa 2.889 2.950 0.061
NaLi lithium sodium rLiNa 2.889 2.950 0.061
NBr nitrogen monobromide rNBr 1.765 1.826 0.061
PS phosphorus sulfide rPS 1.900 1.839 -0.061
PS phosphorus sulfide rPS 1.900 1.839 -0.061
B4H10 Tetraborane(10) rHB 1.315 1.254 -0.061
ClFO3 Perchloryl fluoride rFCl 1.598 1.658 0.060
SiC silicon monocarbide rCSi 1.722 1.662 -0.060
SiC silicon monocarbide rCSi 1.722 1.662 -0.060
FOO Dioxygen monofluoride radical rOO 1.200 1.260 0.060
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.521 -0.059
Li2 Lithium diatomic rLiLi 2.673 2.732 0.059
Li2 Lithium diatomic rLiLi 2.673 2.732 0.059
CuH Copper monohydride rCuH 1.463 1.404 -0.058
CuH Copper monohydride rCuH 1.463 1.404 -0.058
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.522 -0.058
FSSF Difluorodisulfane rSS 1.890 1.948 0.058
BHCl2 Borane, dichloro- rBH 1.130 1.188 0.058
SF Monosulfur monofluoride rSF 1.599 1.657 0.058
C4H10O Ethoxy ethane rCO 1.411 1.469 0.058
CF3CN Acetonitrile, trifluoro- rCN 1.154 1.211 0.057
CaBr2 Calcium dibromide rCaBr 2.616 2.673 0.057
Ne2+ Neon diatomic cation rNeNe 1.765 1.708 -0.057
TiCl Titanium Monochloride rClTi 2.265 2.321 0.056
KBr Potassium Bromide rKBr 2.821 2.877 0.056
Li2+ lithium diatomic cation rLiLi 3.112 3.167 0.056
C2H2+ acetylene cation rCC 1.253 1.308 0.055
LiH Lithium Hydride rLiH 1.595 1.650 0.055
LiH Lithium Hydride rLiH 1.595 1.650 0.055
CO Carbon monoxide rCO 1.128 1.182 0.054
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.347 -0.053
BrO Bromine monoxide rOBr 1.718 1.771 0.053
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
AlO Aluminum monoxide rAlO 1.618 1.670 0.052
AlO Aluminum monoxide rAlO 1.618 1.670 0.052
C4H6 Methylenecyclopropane rCH 1.088 1.036 -0.052
KOH Potassium hydroxide rOH 0.912 0.964 0.052
FNO Nitrosyl fluoride rNF 1.512 1.460 -0.052
FNO Nitrosyl fluoride rNF 1.512 1.460 -0.052
CH3CF3 Ethane, 1,1,1-trifluoro- rCH 1.081 1.029 -0.052
BrCl Bromine monochloride rClBr 2.136 2.188 0.052
LiH Lithium Hydride rLiH 1.595 1.646 0.051
GaO Gallium monoxide rOGa 1.743 1.794 0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
C2H6O2S Dimethyl sulfone rCH 1.091 1.040 -0.051
243 molecules.