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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 mPW1PW91/aug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.194 3.109
C4H6 1-Methylcyclopropene rCH 1.087 3.401 2.314
C4H6 1-Methylcyclopropene rCC 1.476 2.249 0.773
C4H6 1-Methylcyclopropene rCH 1.087 1.822 0.735
CH3CH2SH ethanethiol rCH 1.095 1.825 0.730
CH3CH2SH ethanethiol rCH 1.095 1.821 0.726
HSSSH trisulfane rHS 1.344 2.061 0.717
HSSSH trisulfane rHS 1.344 2.061 0.717
HSSSH trisulfane rHS 1.344 2.060 0.717
HSSSH trisulfane rHS 1.344 2.060 0.717
Ar2 Argon diatomic rArAr 3.758 4.466 0.708
S4 Sulfur tetramer rSS 2.155 2.853 0.698
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.753 0.655
CH3SO2NH2 methanesulfonamide rCN 1.207 1.667 0.460
ONNO NO dimer rNN 2.236 1.778 -0.458
Be2 Beryllium diatomic rBeBe 2.460 2.011 -0.449
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
C4H6 1-Methylcyclopropene rCH 1.070 1.500 0.430
CH3CH2SH ethanethiol rCH 1.089 1.516 0.427
CH3CH2SH ethanethiol rCH 1.089 1.514 0.425
C4H6 1-Methylcyclopropene rCC 1.515 1.090 -0.425
CH3CH2SH ethanethiol rCH 1.092 1.516 0.424
CH3CH2SH ethanethiol rCH 1.092 1.514 0.422
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.498 0.405
GaP Gallium monophosphide rPGa 2.450 2.084 -0.366
GaP Gallium monophosphide rPGa 2.450 2.084 -0.366
GaP Gallium monophosphide rPGa 2.450 2.084 -0.366
GaP Gallium monophosphide rPGa 2.450 2.084 -0.366
CH2CHCH2F Allyl Fluoride rHC 1.130 1.487 0.357
CH2CHCH2F Allyl Fluoride rHC 1.130 1.486 0.356
S4 Sulfur tetramer rSS 2.155 2.505 0.350
C3H3NO Isoxazole rCH 1.075 1.416 0.341
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
AlP Aluminum monophosphide rAlP 2.400 2.079 -0.321
CH3CH2SH ethanethiol rCS 1.820 1.514 -0.306
CH3CH2SH ethanethiol rCS 1.820 1.516 -0.304
C4H10O Methyl propyl ether rCH 1.099 1.401 0.302
CH3CH2SH ethanethiol rCC 1.528 1.825 0.297
CH3CH2SH ethanethiol rCC 1.528 1.821 0.293
Mg2 Magnesium diatomic rMgMg 3.891 3.600 -0.291
Si2H2 disilyne rSiSi 2.215 1.966 -0.250
C2H2+ acetylene cation rCH 1.077 1.316 0.239
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.277 0.237
S4 Sulfur tetramer rSS 1.898 2.112 0.214
GaP Gallium monophosphide rPGa 2.450 2.236 -0.214
GaP Gallium monophosphide rPGa 2.450 2.236 -0.214
GaP Gallium monophosphide rPGa 2.450 2.236 -0.214
GaP Gallium monophosphide rPGa 2.450 2.236 -0.214
Si2H2 disilyne rSiH 1.668 1.463 -0.205
C4H6 1-Methylcyclopropene rCC 1.300 1.500 0.200
Ne2 Neon diatomic rNeNe 3.100 3.292 0.192
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.400 2.214 -0.186
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
AlP Aluminum monophosphide rAlP 2.260 2.079 -0.181
Si2H2 disilyne rSiH 1.668 1.494 -0.174
Ar2+ Argon diatomic cation rArAr 2.320 2.490 0.170
GaP Gallium monophosphide rPGa 2.250 2.084 -0.166
GaP Gallium monophosphide rPGa 2.250 2.084 -0.166
GaP Gallium monophosphide rPGa 2.250 2.084 -0.166
GaP Gallium monophosphide rPGa 2.250 2.084 -0.166
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.523 0.164
S3 Sulfur trimer rSS 1.917 2.077 0.160
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.084 -0.156
GaP Gallium monophosphide rPGa 2.240 2.084 -0.156
GaP Gallium monophosphide rPGa 2.240 2.084 -0.156
GaP Gallium monophosphide rPGa 2.240 2.084 -0.156
GaP Gallium monophosphide rPGa 2.240 2.084 -0.156
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
AlP Aluminum monophosphide rAlP 2.220 2.079 -0.141
ClF3 Chlorine trifluoride rFCl 1.597 1.730 0.133
ClF3 Chlorine trifluoride rFCl 1.597 1.730 0.133
GaP Gallium monophosphide rPGa 2.110 2.236 0.126
GaP Gallium monophosphide rPGa 2.110 2.236 0.126
GaP Gallium monophosphide rPGa 2.110 2.236 0.126
GaP Gallium monophosphide rPGa 2.110 2.236 0.126
Si2H2 disilyne rSiSi 2.215 2.091 -0.125
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
Si2H2 disilyne rSiSi 2.215 2.106 -0.110
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
SeO3 selenium trioxide rSeO 1.688 1.590 -0.098
SiC silicon monocarbide rCSi 1.722 1.641 -0.081
B4H10 Tetraborane(10) rHB 1.484 1.408 -0.076
B2 Boron diatomic rBB 1.590 1.516 -0.074
ClOOCl Dichlorine dioxide rOO 1.426 1.356 -0.070
CO Carbon monoxide rCO 1.128 1.195 0.067
GaCl3 Gallium trichloride rClGa 2.180 2.115 -0.066
GaCl3 Gallium trichloride rClGa 2.180 2.115 -0.065
BN boron nitride rBN 1.325 1.262 -0.063
CH3CHNOH Acetaldoxime rCC 1.550 1.487 -0.063
S4 Sulfur tetramer rSS 2.155 2.096 -0.059
Li2 Lithium diatomic rLiLi 2.673 2.731 0.058
C2 Carbon diatomic rCC 1.243 1.301 0.058
C4H8O2 Ethyl acetate rCO 1.448 1.506 0.058
Si2H2 disilyne rSiH 1.668 1.724 0.056
B4H10 Tetraborane(10) rHB 1.315 1.259 -0.056
C3H3NO Isoxazole rCC 1.356 1.302 -0.054
HCF Fluoromethylene rCH 1.138 1.086 -0.052
He2+ helium diatomic cation rHeHe 1.081 1.131 0.051
C3H5 Allyl radical rCC 1.428 1.378 -0.050
C3H5 Allyl radical rCC 1.428 1.378 -0.050
116 molecules.