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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 4.213 3.128
C4H6 1-Methylcyclopropene rCH 1.087 3.423 2.336
Be2 Beryllium diatomic rBeBe 2.460 4.689 2.229
Mg2 Magnesium diatomic rMgMg 3.891 5.308 1.418
C2H4O3 trioxolane124 rCN 1.303 2.187 0.884
C4H6 1-Methylcyclopropene rCC 1.476 2.257 0.781
HSSSH trisulfane rHS 1.344 2.078 0.734
HSSSH trisulfane rHS 1.344 2.078 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 1.828 0.733
C4H6 1-Methylcyclopropene rCH 1.087 1.818 0.731
CH3CH2SH ethanethiol rCH 1.095 1.825 0.730
C4H6 1-Methylcyclopropene rCH 1.098 1.772 0.674
C4H6 1-Methylcyclopropene rCH 1.098 1.759 0.661
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 1.676 0.469
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
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
C4H6 1-Methylcyclopropene rCH 1.070 1.507 0.437
CH3CH2SH ethanethiol rCH 1.089 1.524 0.435
CH3CH2SH ethanethiol rCH 1.089 1.523 0.434
CH3CH2SH ethanethiol rCH 1.092 1.524 0.432
CH3CH2SH ethanethiol rCH 1.092 1.523 0.431
C4H6 1-Methylcyclopropene rCC 1.515 1.089 -0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.514 0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.514 0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.505 0.412
C2H4F2 1,2-difluoroethane rCH 1.093 1.505 0.412
CH2CHCH2F Allyl Fluoride rHC 1.130 1.499 0.369
CH2CHCH2F Allyl Fluoride rHC 1.130 1.497 0.367
C3H3NO Isoxazole rCH 1.075 1.427 0.352
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
C4H10O Methyl propyl ether rCH 1.099 1.412 0.313
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 1.828 0.300
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
CH3CH2SH ethanethiol rCC 1.528 1.825 0.297
CH3CH2SH ethanethiol rCS 1.820 1.524 -0.296
Al2 Aluminum diatomic rAlAl 2.701 2.957 0.256
S4 Sulfur tetramer rSS 1.898 2.132 0.234
Si2H2 disilyne rSiSi 2.215 1.983 -0.232
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.269 0.229
C2H2+ acetylene cation rCH 1.077 1.301 0.224
Si2H2 disilyne rSiH 1.668 1.457 -0.211
C4H6 1-Methylcyclopropene rCC 1.300 1.508 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
Ar2+ Argon diatomic cation rArAr 2.320 2.523 0.203
CaS Calcium sulfide rSCa 2.318 2.519 0.202
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
Si2H2 disilyne rSiH 1.668 1.484 -0.184
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
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
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
NO3 Nitrogen trioxide rNO 1.238 1.379 0.142
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
CrH Chromium hydride rHCr 1.655 1.782 0.127
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
CaH Calcium monohydride rCaH 2.003 2.118 0.115
CaH Calcium monohydride rCaH 2.003 2.118 0.115
Si2H2 disilyne rSiSi 2.215 2.107 -0.108
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
BC boron monocarbide rBC 1.491 1.391 -0.100
AlN Aluminum nitride rNAl 1.786 1.687 -0.099
N2O4 Dinitrogen tetroxide rNN 1.782 1.686 -0.096
Si2H2 disilyne rSiSi 2.215 2.119 -0.096
CaOH Calcium monohydroxide rOCa 1.976 2.071 0.095
LiK Lithium Potassium rLiK 3.270 3.364 0.094
SiP Silicon monophosphide rSiP 2.078 1.988 -0.090
SeO3 selenium trioxide rSeO 1.688 1.599 -0.088
CuO Copper Monoxide rCuO 1.724 1.639 -0.085
CuF Copper monofluoride rCuF 1.745 1.663 -0.082
Na2 Sodium diatomic rNaNa 3.079 3.159 0.080
Na2 Sodium diatomic rNaNa 3.079 3.158 0.079
B4H10 Tetraborane(10) rHB 1.484 1.408 -0.076
KCl Potassium Chloride rKCl 2.667 2.743 0.076
VO Vanadium monoxide rVO 1.589 1.515 -0.074
CaF Calcium monofluoride rFCa 1.967 2.041 0.074
C2 Carbon diatomic rCC 1.243 1.314 0.072
C2 Carbon diatomic rCC 1.243 1.314 0.072
ClSSCl Disulfur dichloride rSS 1.931 2.002 0.071
B4H10 Tetraborane(10) rHB 1.315 1.246 -0.069
B2 Boron diatomic rBB 1.590 1.523 -0.067
B2 Boron diatomic rBB 1.590 1.523 -0.067
CuH Copper monohydride rCuH 1.463 1.396 -0.067
CuH Copper monohydride rCuH 1.463 1.396 -0.067
C4H8O2 Ethyl acetate rCO 1.448 1.514 0.066
KH Potassium hydride rKH 2.243 2.306 0.064
KH Potassium hydride rKH 2.243 2.306 0.064
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
C2H2+ acetylene cation rCC 1.253 1.313 0.060
SiC silicon monocarbide rCSi 1.722 1.662 -0.060
SiC silicon monocarbide rCSi 1.722 1.662 -0.060
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.521 -0.059
Li2 Lithium diatomic rLiLi 2.673 2.732 0.059
FSSF Difluorodisulfane rSS 1.890 1.948 0.058
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
Li2+ lithium diatomic cation rLiLi 3.112 3.167 0.056
CO Carbon monoxide rCO 1.128 1.182 0.054
HCF Fluoromethylene rCH 1.138 1.084 -0.054
HCF Fluoromethylene rCH 1.138 1.084 -0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
BrO Bromine monoxide rOBr 1.718 1.771 0.053
FNO Nitrosyl fluoride rNF 1.512 1.460 -0.052
GaO Gallium monoxide rOGa 1.743 1.794 0.051
CH3CHNOH Acetaldoxime rCC 1.550 1.499 -0.051
160 molecules.