return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Geometry > Bad Calculations > Bad Calculated Bond Lengths OR Resources > Bad Calculations > Geometry > Bad Calculated Bond Lengths

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 MP2/aug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.210 3.125
C4H6 1-Methylcyclopropene rCH 1.087 3.409 2.322
C3H3NO Oxazole rCH 1.073 3.151 2.078
H2SO4 Sulfuric acid rOH 0.970 2.842 1.872
C3H3NO Oxazole rCC 1.353 3.144 1.791
C5H8O Cyclopentanone rCH 1.095 2.768 1.673
C4H10O Ethanol, 1,1-dimethyl- rCH 1.117 2.421 1.304
C3H3NO Oxazole rCH 1.075 2.198 1.123
C3H3NO Oxazole rCH 1.075 2.143 1.068
H2ONH3 Water Ammonia Dimer rNH 2.983 1.958 -1.025
C5H8O Cyclopentanone rCC 1.557 2.454 0.897
C2H4O3 trioxolane124 rCN 1.303 2.181 0.878
C3H3NO Oxazole rCO 1.357 2.235 0.878
C4H6 1-Methylcyclopropene rCC 1.476 2.253 0.777
C4H6 1-Methylcyclopropene rCH 1.087 1.826 0.739
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.821 0.726
HSSSH trisulfane rHS 1.344 2.062 0.719
HSSSH trisulfane rHS 1.344 2.062 0.719
HSSSH trisulfane rHS 1.344 2.061 0.718
HSSSH trisulfane rHS 1.344 2.061 0.718
C4H10O Ethanol, 1,1-dimethyl- rCO 1.446 2.161 0.715
S4 Sulfur tetramer rSS 2.155 2.846 0.691
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.756 0.658
CH3SO2NH2 methanesulfonamide rCN 1.207 1.669 0.462
S4 Sulfur tetramer rSS 2.155 2.611 0.456
S4 Sulfur tetramer rSS 2.155 2.610 0.455
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
Be2 Beryllium diatomic rBeBe 2.460 2.021 -0.439
C4H6 1-Methylcyclopropene rCH 1.070 1.509 0.439
CH3CH2SH ethanethiol rCH 1.089 1.519 0.430
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
C4H6 1-Methylcyclopropene rCC 1.515 1.087 -0.428
CH3CH2SH ethanethiol rCH 1.092 1.519 0.427
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
Al2 Aluminum diatomic rAlAl 2.701 2.275 -0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
C2H4F2 1,2-difluoroethane rCH 1.093 1.499 0.406
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
GaP Gallium monophosphide rPGa 2.450 2.050 -0.400
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
CH2CHCH2F Allyl Fluoride rHC 1.130 1.488 0.358
AlP Aluminum monophosphide rAlP 2.400 2.061 -0.339
AlP Aluminum monophosphide rAlP 2.400 2.061 -0.339
AlP Aluminum monophosphide rAlP 2.400 2.061 -0.339
C3H3NO Isoxazole rCH 1.075 1.412 0.337
CH3CF3 Ethane, 1,1,1-trifluoro- rCF 1.340 1.664 0.324
C3H3NO Oxazole rCN 1.395 1.075 -0.320
Be2 Beryllium diatomic rBeBe 2.460 2.780 0.320
C4H10O Methyl propyl ether rCH 1.099 1.412 0.313
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.519 -0.301
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.821 0.293
Al2 Aluminum diatomic rAlAl 2.701 2.991 0.290
C5H8O Cyclopentanone rCC 1.504 1.761 0.257
ONNO NO dimer rNN 2.236 1.980 -0.256
Mg2 Magnesium diatomic rMgMg 3.891 4.138 0.248
Mg2 Magnesium diatomic rMgMg 3.891 4.138 0.248
GaP Gallium monophosphide rPGa 2.450 2.203 -0.247
GaP Gallium monophosphide rPGa 2.450 2.203 -0.247
GaP Gallium monophosphide rPGa 2.450 2.203 -0.247
GaP Gallium monophosphide rPGa 2.450 2.203 -0.247
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.275 0.235
C2H2+ acetylene cation rCH 1.077 1.306 0.229
Al2 Aluminum diatomic rAlAl 2.701 2.474 -0.227
Si2H2 disilyne rSiSi 2.215 1.992 -0.223
S4 Sulfur tetramer rSS 1.898 2.116 0.218
C4H6 1-Methylcyclopropene rCC 1.300 1.511 0.211
Si2H2 disilyne rSiH 1.668 1.459 -0.209
B2 Boron diatomic rBB 1.590 1.381 -0.209
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
GaP Gallium monophosphide rPGa 2.250 2.050 -0.200
AlP Aluminum monophosphide rAlP 2.260 2.061 -0.199
AlP Aluminum monophosphide rAlP 2.260 2.061 -0.199
AlP Aluminum monophosphide rAlP 2.260 2.061 -0.199
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
AlP Aluminum monophosphide rAlP 2.400 2.206 -0.194
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
GaP Gallium monophosphide rPGa 2.240 2.050 -0.190
Si2H2 disilyne rSiH 1.668 1.486 -0.182
S3 Sulfur trimer rSS 1.917 2.087 0.170
Si2 Silicon diatomic rSiSi 2.246 2.078 -0.168
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.519 0.160
AlP Aluminum monophosphide rAlP 2.220 2.061 -0.159
AlP Aluminum monophosphide rAlP 2.220 2.061 -0.159
AlP Aluminum monophosphide rAlP 2.220 2.061 -0.159
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.087 -0.153
ArH+ Argon hydride cation rArH 1.292 1.441 0.149
ClF3 Chlorine trifluoride rFCl 1.597 1.745 0.149
ClF3 Chlorine trifluoride rFCl 1.597 1.745 0.149
AlN Aluminum nitride rNAl 1.786 1.642 -0.144
C5H8O Cyclopentanone rCO 1.215 1.088 -0.127
N2 Nitrogen diatomic rNN 1.098 1.218 0.120
N2 Nitrogen diatomic rNN 1.098 1.218 0.120
PF3 Phosphorus trifluoride rFP 1.561 1.676 0.115
Si2H2 disilyne rSiSi 2.215 2.103 -0.113
BC boron monocarbide rBC 1.491 1.385 -0.106
NF3 Nitrogen trifluoride rNF 1.365 1.467 0.102
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.099
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
N2 Nitrogen diatomic rNN 1.213 1.114 -0.098
NaLi lithium sodium rLiNa 2.889 2.987 0.098
Na2 Sodium diatomic rNaNa 3.079 3.177 0.098
Na2 Sodium diatomic rNaNa 3.079 3.177 0.098
C3H3NO Oxazole rCN 1.292 1.388 0.097
GaP Gallium monophosphide rPGa 2.110 2.203 0.093
GaP Gallium monophosphide rPGa 2.110 2.203 0.093
GaP Gallium monophosphide rPGa 2.110 2.203 0.093
GaP Gallium monophosphide rPGa 2.110 2.203 0.093
VO Vanadium monoxide rVO 1.589 1.497 -0.092
CF3CN Acetonitrile, trifluoro- rCF 1.328 1.420 0.091
Ar2+ Argon diatomic cation rArAr 2.320 2.408 0.088
Si2H2 disilyne rSiSi 2.215 2.129 -0.087
SeO3 selenium trioxide rSeO 1.688 1.601 -0.087
NaLi lithium sodium rLiNa 2.889 2.975 0.086
NaLi lithium sodium rLiNa 2.889 2.974 0.085
C3H4O Cyclopropanone rCO 1.191 1.274 0.083
CHCl3 Chloroform rCCl 1.762 1.681 -0.081
SiP Silicon monophosphide rSiP 2.078 1.997 -0.080
SiP Silicon monophosphide rSiP 2.078 1.997 -0.080
Li2 Lithium diatomic rLiLi 2.673 2.750 0.077
Li2 Lithium diatomic rLiLi 2.673 2.750 0.077
NS Mononitrogen monosulfide rNS 1.497 1.421 -0.076
Si2 Silicon diatomic rSiSi 2.246 2.170 -0.076
C2 Carbon diatomic rCC 1.243 1.317 0.074
C2 Carbon diatomic rCC 1.243 1.317 0.074
CF3CN Acetonitrile, trifluoro- rCN 1.154 1.228 0.074
C3H4O Cyclopropanone rCH 1.086 1.013 -0.073
CF3CN Acetonitrile, trifluoro- rCC 1.492 1.419 -0.073
NaF sodium fluoride rNaF 1.926 1.999 0.073
NaF sodium fluoride rNaF 1.926 1.999 0.073
B4H10 Tetraborane(10) rHB 1.484 1.411 -0.073
GaCl3 Gallium trichloride rClGa 2.180 2.108 -0.072
GaCl3 Gallium trichloride rClGa 2.180 2.108 -0.072
ClFO3 Perchloryl fluoride rFCl 1.598 1.670 0.072
PS phosphorus sulfide rPS 1.900 1.829 -0.071
PS phosphorus sulfide rPS 1.900 1.829 -0.071
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.510 -0.070
PCl3 Phosphorus trichloride rPCl 2.043 1.973 -0.070
B2 Boron diatomic rBB 1.590 1.521 -0.069
B2 Boron diatomic rBB 1.590 1.521 -0.069
C2H2+ acetylene cation rCC 1.253 1.321 0.068
FNO Nitrosyl fluoride rNF 1.512 1.445 -0.067
Ne2 Neon diatomic rNeNe 3.100 3.164 0.064
ScF Scandium monofluoride rFSc 1.788 1.852 0.064
B4H10 Tetraborane(10) rHB 1.315 1.252 -0.063
C4H8O2 Ethyl acetate rCO 1.448 1.508 0.060
CH3CHNOH Acetaldoxime rCC 1.550 1.490 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
GaP Gallium monophosphide rPGa 2.110 2.050 -0.060
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
FSN Thiazyl fluoride rFS 1.643 1.702 0.059
ClNO2 Nitryl chloride rNCl 1.840 1.897 0.057
FNO Nitrosyl fluoride rNF 1.512 1.568 0.056
HCF Fluoromethylene rCH 1.138 1.082 -0.056
HCF Fluoromethylene rCH 1.138 1.082 -0.056
BeCl2 Beryllium chloride rBeCl 1.750 1.806 0.056
BrO+ Bromine monoxide cation rOBr 1.635 1.580 -0.055
C4H10O Ethoxy ethane rCO 1.411 1.466 0.055
C3H5 Allyl radical rCC 1.428 1.373 -0.055
C3H5 Allyl radical rCC 1.428 1.373 -0.055
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
AlP Aluminum monophosphide rAlP 2.260 2.206 -0.054
C4H6 Methylenecyclopropane rCH 1.088 1.035 -0.053
CH3CF3 Ethane, 1,1,1-trifluoro- rCH 1.081 1.029 -0.052
NaCl Sodium Chloride rNaCl 2.361 2.413 0.052
NaCl Sodium Chloride rNaCl 2.361 2.413 0.052
FNO2 Nitryl fluoride rNF 1.467 1.518 0.051
C4H6 Methylenecyclopropane rCH 1.090 1.039 -0.051
NaBr Sodium Bromide rNaBr 2.502 2.553 0.051
196 molecules.