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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 MP3=FULL/TZVP

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
Mg2 Magnesium diatomic rMgMg 3.891 5.762 1.872
HSSSH trisulfane rHS 1.344 2.090 0.747
HSSSH trisulfane rHS 1.344 2.090 0.747
S4 Sulfur tetramer rSS 2.155 2.900 0.745
CH3CH2SH ethanethiol rCH 1.095 1.836 0.741
CH3CH2SH ethanethiol rCH 1.095 1.832 0.737
ONNO NO dimer rNN 2.236 1.721 -0.515
Ar2 Argon diatomic rArAr 3.758 4.251 0.493
CH3SO2NH2 methanesulfonamide rCN 1.207 1.680 0.474
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
S4 Sulfur tetramer rSS 2.155 2.584 0.429
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
Be2 Beryllium diatomic rBeBe 2.460 2.036 -0.424
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C2H4F2 1,2-difluoroethane rCH 1.093 1.504 0.411
CH2CHCH2F Allyl Fluoride rHC 1.130 1.496 0.366
GaP Gallium monophosphide rPGa 2.450 2.091 -0.359
GaP Gallium monophosphide rPGa 2.450 2.091 -0.359
GaP Gallium monophosphide rPGa 2.450 2.091 -0.359
GaP Gallium monophosphide rPGa 2.450 2.091 -0.359
CaO Calcium monoxide rOCa 1.822 2.178 0.356
AlP Aluminum monophosphide rAlP 2.400 2.077 -0.323
AlP Aluminum monophosphide rAlP 2.400 2.077 -0.323
AlP Aluminum monophosphide rAlP 2.400 2.077 -0.323
CaS Calcium sulfide rSCa 2.318 2.631 0.313
CH3CH2SH ethanethiol rCC 1.528 1.836 0.308
C4H10O Methyl propyl ether rCH 1.099 1.405 0.306
CH3CH2SH ethanethiol rCC 1.528 1.832 0.304
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
S4 Sulfur tetramer rSS 1.898 2.144 0.246
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.272 0.232
C2H2+ acetylene cation rCH 1.077 1.307 0.230
CaBr Calcium monobromide rCaBr 2.594 2.798 0.204
GaP Gallium monophosphide rPGa 2.450 2.252 -0.198
GaP Gallium monophosphide rPGa 2.450 2.252 -0.198
GaP Gallium monophosphide rPGa 2.450 2.252 -0.198
GaP Gallium monophosphide rPGa 2.450 2.252 -0.198
S3 Sulfur trimer rSS 1.917 2.113 0.196
CaC Calcium monocarbide rCCa 2.302 2.489 0.188
AlP Aluminum monophosphide rAlP 2.260 2.077 -0.183
AlP Aluminum monophosphide rAlP 2.260 2.077 -0.183
AlP Aluminum monophosphide rAlP 2.260 2.077 -0.183
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
ClF3 Chlorine trifluoride rFCl 1.597 1.757 0.160
ClF3 Chlorine trifluoride rFCl 1.597 1.757 0.160
GaP Gallium monophosphide rPGa 2.250 2.091 -0.159
GaP Gallium monophosphide rPGa 2.250 2.091 -0.159
GaP Gallium monophosphide rPGa 2.250 2.091 -0.159
GaP Gallium monophosphide rPGa 2.250 2.091 -0.159
Ar2+ Argon diatomic cation rArAr 2.320 2.478 0.158
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.085 -0.155
GaP Gallium monophosphide rPGa 2.240 2.091 -0.149
GaP Gallium monophosphide rPGa 2.240 2.091 -0.149
GaP Gallium monophosphide rPGa 2.240 2.091 -0.149
GaP Gallium monophosphide rPGa 2.240 2.091 -0.149
AlP Aluminum monophosphide rAlP 2.220 2.077 -0.143
AlP Aluminum monophosphide rAlP 2.220 2.077 -0.143
AlP Aluminum monophosphide rAlP 2.220 2.077 -0.143
GaP Gallium monophosphide rPGa 2.110 2.252 0.142
GaP Gallium monophosphide rPGa 2.110 2.252 0.142
GaP Gallium monophosphide rPGa 2.110 2.252 0.142
GaP Gallium monophosphide rPGa 2.110 2.252 0.142
CaBr2 Calcium dibromide rCaBr 2.616 2.754 0.138
N2 Nitrogen diatomic rNN 1.213 1.090 -0.123
N2 Nitrogen diatomic rNN 1.213 1.090 -0.123
KH Potassium hydride rKH 2.243 2.362 0.119
KOH Potassium hydroxide rOK 2.212 2.315 0.103
B4H10 Tetraborane(10) rHB 1.484 1.411 -0.073
SiP Silicon monophosphide rSiP 2.078 2.007 -0.071
B2 Boron diatomic rBB 1.590 1.521 -0.069
B4H10 Tetraborane(10) rHB 1.315 1.250 -0.065
SiC silicon monocarbide rCSi 1.722 1.658 -0.064
C4H8O2 Ethyl acetate rCO 1.448 1.512 0.064
C2 Carbon diatomic rCC 1.243 1.304 0.061
ClF3 Chlorine trifluoride rFCl 1.697 1.757 0.060
ClF3 Chlorine trifluoride rFCl 1.697 1.757 0.060
BN boron nitride rBN 1.325 1.268 -0.057
HCF Fluoromethylene rCH 1.138 1.082 -0.056
ZnCN Zinc monocyanide rCZn 1.950 2.004 0.054
VO Vanadium monoxide rVO 1.589 1.535 -0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.496 -0.054
C3H5 Allyl radical rCC 1.428 1.376 -0.052
C2H2+ acetylene cation rCC 1.253 1.305 0.052
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.081 0.051
NCl nitrogen monochloride rNCl 1.611 1.661 0.050
94 molecules.