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 B1B95/6-31G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.211 3.126
C4H6 1-Methylcyclopropene rCH 1.087 3.410 2.323
H2ONH3 Water Ammonia Dimer rNH 2.983 1.957 -1.026
C2H4O3 trioxolane124 rCN 1.303 2.168 0.865
C4H6 1-Methylcyclopropene rCC 1.476 2.253 0.777
C4H6 1-Methylcyclopropene rCH 1.087 1.822 0.735
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
CH3CH2SH ethanethiol rCH 1.095 1.829 0.734
CH3CH2SH ethanethiol rCH 1.095 1.827 0.732
CH3CH2SH ethanethiol rCH 1.095 1.823 0.728
HSSSH trisulfane rHS 1.344 2.067 0.723
HSSSH trisulfane rHS 1.344 2.067 0.723
HSSSH trisulfane rHS 1.344 2.066 0.722
HSSSH trisulfane rHS 1.344 2.066 0.722
S4 Sulfur tetramer rSS 2.155 2.859 0.704
C4H6 1-Methylcyclopropene rCH 1.098 1.775 0.677
C4H6 1-Methylcyclopropene rCH 1.098 1.757 0.659
CH3SO2NH2 methanesulfonamide rCN 1.207 1.677 0.470
C4H4N2 Succinonitrile rCC 1.561 1.093 -0.468
Be2 Beryllium diatomic rBeBe 2.460 2.011 -0.449
Be2 Beryllium diatomic rBeBe 2.460 2.011 -0.449
ONNO NO dimer rNN 2.236 1.790 -0.447
C4H10O Methyl propyl ether rCC 1.530 1.094 -0.436
C4H6 1-Methylcyclopropene rCH 1.070 1.501 0.431
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.089 1.517 0.428
CH3CH2SH ethanethiol rCH 1.089 1.517 0.428
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
CH3CH2SH ethanethiol rCH 1.092 1.517 0.425
CH3CH2SH ethanethiol rCH 1.092 1.517 0.425
C4H6 1-Methylcyclopropene rCC 1.515 1.094 -0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.513 0.420
C2H4F2 1,2-difluoroethane rCH 1.093 1.513 0.420
C4H4N2 Succinonitrile rCH 1.123 1.540 0.417
C2H4F2 1,2-difluoroethane rCH 1.093 1.502 0.409
C2H4F2 1,2-difluoroethane rCH 1.093 1.502 0.409
S4 Sulfur tetramer rSS 2.155 2.554 0.399
GaP Gallium monophosphide rPGa 2.450 2.072 -0.378
GaP Gallium monophosphide rPGa 2.450 2.072 -0.378
GaP Gallium monophosphide rPGa 2.450 2.072 -0.378
GaP Gallium monophosphide rPGa 2.450 2.072 -0.378
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
CH2CHCH2F Allyl Fluoride rHC 1.130 1.490 0.360
C4H4N2 Succinonitrile rCH 1.111 1.458 0.347
C3H3NO Isoxazole rCH 1.075 1.416 0.341
Al2 Aluminum diatomic rAlAl 2.701 3.028 0.327
AlP Aluminum monophosphide rAlP 2.400 2.075 -0.325
AlP Aluminum monophosphide rAlP 2.400 2.075 -0.325
AlP Aluminum monophosphide rAlP 2.400 2.075 -0.325
CH3CH2SH ethanethiol rCS 1.820 1.517 -0.303
CH3CH2SH ethanethiol rCS 1.820 1.517 -0.303
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
CH3CH2SH ethanethiol rCC 1.528 1.829 0.301
C4H10O Methyl propyl ether rCH 1.099 1.398 0.299
CH3CH2SH ethanethiol rCC 1.528 1.827 0.299
CH3CH2SH ethanethiol rCC 1.528 1.823 0.295
Ar2+ Argon diatomic cation rArAr 2.320 2.597 0.277
Ar2 Argon diatomic rArAr 3.758 4.032 0.274
Si2H2 disilyne rSiSi 2.215 1.965 -0.250
GaP Gallium monophosphide rPGa 2.450 2.215 -0.235
GaP Gallium monophosphide rPGa 2.450 2.215 -0.235
GaP Gallium monophosphide rPGa 2.450 2.215 -0.235
GaP Gallium monophosphide rPGa 2.450 2.215 -0.235
C2H2+ acetylene cation rCH 1.077 1.310 0.233
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.271 0.231
Mg2 Magnesium diatomic rMgMg 3.891 3.667 -0.224
Mg2 Magnesium diatomic rMgMg 3.891 3.667 -0.224
S4 Sulfur tetramer rSS 1.898 2.121 0.223
Al2 Aluminum diatomic rAlAl 2.701 2.480 -0.221
Al2 Aluminum diatomic rAlAl 2.701 2.480 -0.221
Si2H2 disilyne rSiH 1.668 1.464 -0.204
CaO Calcium monoxide rOCa 1.822 2.019 0.197
CaO Calcium monoxide rOCa 1.822 2.019 0.197
C4H6 1-Methylcyclopropene rCC 1.300 1.497 0.197
Si2 Silicon diatomic rSiSi 2.246 2.049 -0.197
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 2.075 -0.185
AlP Aluminum monophosphide rAlP 2.260 2.075 -0.185
AlP Aluminum monophosphide rAlP 2.260 2.075 -0.185
GaP Gallium monophosphide rPGa 2.250 2.072 -0.178
GaP Gallium monophosphide rPGa 2.250 2.072 -0.178
GaP Gallium monophosphide rPGa 2.250 2.072 -0.178
GaP Gallium monophosphide rPGa 2.250 2.072 -0.178
Si2H2 disilyne rSiH 1.668 1.493 -0.175
GaP Gallium monophosphide rPGa 2.240 2.072 -0.168
GaP Gallium monophosphide rPGa 2.240 2.072 -0.168
GaP Gallium monophosphide rPGa 2.240 2.072 -0.168
GaP Gallium monophosphide rPGa 2.240 2.072 -0.168
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.078 -0.162
S3 Sulfur trimer rSS 1.917 2.078 0.161
CHF2CHF2 1,1,2,2-tetrafluoroethane rCF 1.359 1.516 0.157
CaS Calcium sulfide rSCa 2.318 2.465 0.147
AlP Aluminum monophosphide rAlP 2.220 2.075 -0.145
AlP Aluminum monophosphide rAlP 2.220 2.075 -0.145
AlP Aluminum monophosphide rAlP 2.220 2.075 -0.145
ClF3 Chlorine trifluoride rFCl 1.597 1.734 0.137
ClF3 Chlorine trifluoride rFCl 1.597 1.734 0.137
Si2H2 disilyne rSiSi 2.215 2.086 -0.129
B2 Boron diatomic rBB 1.590 1.469 -0.121
B2 Boron diatomic rBB 1.590 1.469 -0.121
CaCl calcium monochloride rClCa 2.437 2.553 0.117
CaH Calcium monohydride rCaH 2.003 2.115 0.113
N2 Nitrogen diatomic rNN 1.213 1.101 -0.112
N2 Nitrogen diatomic rNN 1.213 1.101 -0.112
Si2H2 disilyne rSiSi 2.215 2.104 -0.112
N2 Nitrogen diatomic rNN 1.213 1.101 -0.112
N2 Nitrogen diatomic rNN 1.213 1.101 -0.112
CaH Calcium monohydride rCaH 2.003 2.113 0.111
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
N2 Nitrogen diatomic rNN 1.213 1.103 -0.110
AlN Aluminum nitride rNAl 1.786 1.677 -0.109
CaC Calcium monocarbide rCCa 2.302 2.411 0.109
N2 Nitrogen diatomic rNN 1.098 1.205 0.107
N2 Nitrogen diatomic rNN 1.098 1.205 0.107
Ne2 Neon diatomic rNeNe 3.100 2.994 -0.106
GaP Gallium monophosphide rPGa 2.110 2.215 0.105
GaP Gallium monophosphide rPGa 2.110 2.215 0.105
GaP Gallium monophosphide rPGa 2.110 2.215 0.105
GaP Gallium monophosphide rPGa 2.110 2.215 0.105
SiP Silicon monophosphide rSiP 2.078 1.977 -0.101
LiK Lithium Potassium rLiK 3.270 3.368 0.098
FOO Dioxygen monofluoride radical rFO 1.649 1.554 -0.095
CuO Copper Monoxide rCuO 1.724 1.629 -0.095
Be2 Beryllium diatomic rBeBe 2.460 2.554 0.094
CaBr Calcium monobromide rCaBr 2.594 2.683 0.089
SeO3 selenium trioxide rSeO 1.688 1.602 -0.086
ClOOCl Dichlorine dioxide rOO 1.426 1.341 -0.085
SiC silicon monocarbide rCSi 1.722 1.641 -0.081
CO Carbon monoxide rCO 1.128 1.208 0.080
CuF Copper monofluoride rCuF 1.745 1.665 -0.080
SiC silicon monocarbide rCSi 1.722 1.643 -0.079
SiC silicon monocarbide rCSi 1.722 1.643 -0.079
NaK Sodium Potassium rNaK 3.589 3.513 -0.076
B4H10 Tetraborane(10) rHB 1.484 1.410 -0.074
BC boron monocarbide rBC 1.491 1.420 -0.071
Li2 Lithium diatomic rLiLi 2.673 2.742 0.069
GaCl3 Gallium trichloride rClGa 2.180 2.112 -0.068
GaCl3 Gallium trichloride rClGa 2.180 2.112 -0.068
Li2 Lithium diatomic rLiLi 2.673 2.741 0.068
B2 Boron diatomic rBB 1.590 1.522 -0.068
B2 Boron diatomic rBB 1.590 1.522 -0.068
C2 Carbon diatomic rCC 1.243 1.310 0.067
C2 Carbon diatomic rCC 1.243 1.310 0.067
Si2H2 disilyne rSiH 1.668 1.734 0.066
He2+ helium diatomic cation rHeHe 1.081 1.146 0.065
K2 Potassium diatomic rKK 3.905 3.970 0.065
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.515 -0.065
CaF Calcium monofluoride rFCa 1.967 2.030 0.063
CH3CHNOH Acetaldoxime rCC 1.550 1.488 -0.062
He2+ helium diatomic cation rHeHe 1.081 1.141 0.061
C4H8O2 Ethyl acetate rCO 1.448 1.508 0.060
CH3CHNOH Acetaldoxime rCC 1.550 1.490 -0.060
B4H10 Tetraborane(10) rHB 1.315 1.257 -0.058
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.343 -0.057
BN boron nitride rBN 1.325 1.268 -0.057
ClFO3 Perchloryl fluoride rFCl 1.598 1.654 0.056
C5H10 2-Pentene, (E)- rCC 1.576 1.520 -0.056
BN boron nitride rBN 1.325 1.270 -0.055
BHCl2 Borane, dichloro- rBH 1.130 1.184 0.054
B2 Boron diatomic rBB 1.590 1.644 0.054
B2 Boron diatomic rBB 1.590 1.643 0.053
CuCl Copper monochloride rCuCl 2.051 1.998 -0.053
FNO Nitrosyl fluoride rNF 1.512 1.459 -0.053
ClOOCl Dichlorine dioxide rOCl 1.704 1.756 0.051
C3H3NO Isoxazole rCC 1.356 1.306 -0.050
176 molecules.