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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 PBE1PBE/6-31G(2df,p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.208 3.123
C4H6 1-Methylcyclopropene rCH 1.087 3.408 2.321
C4H6 1-Methylcyclopropene rCC 1.476 2.255 0.779
C4H6 1-Methylcyclopropene rCH 1.087 1.825 0.738
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.819 0.724
HSSSH trisulfane rHS 1.344 2.052 0.709
HSSSH trisulfane rHS 1.344 2.052 0.709
S4 Sulfur tetramer rSS 2.155 2.842 0.687
C4H6 1-Methylcyclopropene rCH 1.098 1.778 0.680
C4H6 1-Methylcyclopropene rCH 1.098 1.758 0.660
ONNO NO dimer rNN 2.236 1.767 -0.469
CH3SO2NH2 methanesulfonamide rCN 1.207 1.661 0.454
Be2 Beryllium diatomic rBeBe 2.460 2.014 -0.446
C4H10O Methyl propyl ether rCC 1.530 1.096 -0.434
C4H6 1-Methylcyclopropene rCH 1.070 1.502 0.432
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C4H6 1-Methylcyclopropene rCC 1.515 1.094 -0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.504 0.411
GaP Gallium monophosphide rPGa 2.450 2.070 -0.380
GaP Gallium monophosphide rPGa 2.450 2.070 -0.380
GaP Gallium monophosphide rPGa 2.450 2.070 -0.380
GaP Gallium monophosphide rPGa 2.450 2.070 -0.380
CH2CHCH2F Allyl Fluoride rHC 1.130 1.492 0.362
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
C3H3NO Isoxazole rCH 1.075 1.418 0.343
S4 Sulfur tetramer rSS 2.155 2.491 0.336
Mg2 Magnesium diatomic rMgMg 3.891 3.562 -0.329
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
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
C4H10O Methyl propyl ether rCH 1.099 1.396 0.297
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.819 0.291
Si2H2 disilyne rSiSi 2.215 1.964 -0.251
C2H2+ acetylene cation rCH 1.077 1.317 0.240
GaP Gallium monophosphide rPGa 2.450 2.212 -0.238
GaP Gallium monophosphide rPGa 2.450 2.212 -0.238
GaP Gallium monophosphide rPGa 2.450 2.212 -0.238
GaP Gallium monophosphide rPGa 2.450 2.212 -0.238
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.270 0.230
S4 Sulfur tetramer rSS 1.898 2.104 0.206
Si2H2 disilyne rSiH 1.668 1.465 -0.203
C4H6 1-Methylcyclopropene rCC 1.300 1.499 0.199
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
AlP Aluminum monophosphide rAlP 2.400 2.209 -0.191
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
GaP Gallium monophosphide rPGa 2.250 2.070 -0.180
GaP Gallium monophosphide rPGa 2.250 2.070 -0.180
GaP Gallium monophosphide rPGa 2.250 2.070 -0.180
GaP Gallium monophosphide rPGa 2.250 2.070 -0.180
Si2H2 disilyne rSiH 1.668 1.495 -0.173
GaP Gallium monophosphide rPGa 2.240 2.070 -0.170
GaP Gallium monophosphide rPGa 2.240 2.070 -0.170
GaP Gallium monophosphide rPGa 2.240 2.070 -0.170
GaP Gallium monophosphide rPGa 2.240 2.070 -0.170
Ar2+ Argon diatomic cation rArAr 2.320 2.490 0.170
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.522 0.163
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.078 -0.162
S3 Sulfur trimer rSS 1.917 2.070 0.153
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
Ar2 Argon diatomic rArAr 3.758 3.885 0.127
Si2H2 disilyne rSiSi 2.215 2.089 -0.127
CaO Calcium monoxide rOCa 1.822 1.946 0.124
ClF3 Chlorine trifluoride rFCl 1.597 1.720 0.123
ClF3 Chlorine trifluoride rFCl 1.597 1.720 0.123
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
N2 Nitrogen diatomic rNN 1.213 1.096 -0.116
CaC Calcium monocarbide rCCa 2.302 2.414 0.112
Si2H2 disilyne rSiSi 2.215 2.103 -0.112
SeO3 selenium trioxide rSeO 1.688 1.580 -0.107
K2 Potassium diatomic rKK 3.905 4.012 0.107
N2 Nitrogen diatomic rNN 1.098 1.201 0.103
N2 Nitrogen diatomic rNN 1.098 1.201 0.103
GaP Gallium monophosphide rPGa 2.110 2.212 0.102
GaP Gallium monophosphide rPGa 2.110 2.212 0.102
GaP Gallium monophosphide rPGa 2.110 2.212 0.102
GaP Gallium monophosphide rPGa 2.110 2.212 0.102
CaS Calcium sulfide rSCa 2.318 2.414 0.096
ClOOCl Dichlorine dioxide rOO 1.426 1.339 -0.087
SiC silicon monocarbide rCSi 1.722 1.637 -0.085
CaH Calcium monohydride rCaH 2.003 2.085 0.082
Li2 Lithium diatomic rLiLi 2.673 2.747 0.074
GaCl3 Gallium trichloride rClGa 2.180 2.106 -0.074
GaCl3 Gallium trichloride rClGa 2.180 2.107 -0.074
B4H10 Tetraborane(10) rHB 1.484 1.411 -0.073
S4 Sulfur tetramer rSS 2.155 2.083 -0.072
As4 Arsenic tetramer rAsAs 2.435 2.366 -0.069
GaAs Gallium arsenide rGaAs 2.530 2.462 -0.068
GaAs Gallium arsenide rGaAs 2.530 2.462 -0.068
B2 Boron diatomic rBB 1.590 1.522 -0.068
ZnCN Zinc monocyanide rCZn 1.950 1.883 -0.067
C2 Carbon diatomic rCC 1.243 1.308 0.065
FNO Nitrosyl fluoride rNF 1.512 1.447 -0.065
GaAs Gallium arsenide rGaAs 2.530 2.468 -0.062
GaAs Gallium arsenide rGaAs 2.530 2.468 -0.062
C4H8O2 Ethyl acetate rCO 1.448 1.510 0.062
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
BN boron nitride rBN 1.325 1.266 -0.059
CaBr Calcium monobromide rCaBr 2.594 2.649 0.055
Si2H2 disilyne rSiH 1.668 1.722 0.054
B2 Boron diatomic rBB 1.590 1.643 0.053
C2H2+ acetylene cation rCC 1.253 1.306 0.053
B4H10 Tetraborane(10) rHB 1.315 1.263 -0.052
H2O2 Hydrogen peroxide rOO 1.475 1.423 -0.052
H2O2 Hydrogen peroxide rOO 1.475 1.423 -0.052
He2+ helium diatomic cation rHeHe 1.081 1.133 0.052
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
AlP Aluminum monophosphide rAlP 2.260 2.209 -0.051
131 molecules.