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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 PBEPBEultrafine/6-311G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.239 3.154
C4H6 1-Methylcyclopropene rCH 1.087 3.432 2.345
C4H6 1-Methylcyclopropene rCC 1.476 2.272 0.796
HSSSH trisulfane rHS 1.344 2.107 0.764
HSSSH trisulfane rHS 1.344 2.107 0.764
S4 Sulfur tetramer rSS 2.155 2.918 0.763
C4H6 1-Methylcyclopropene rCH 1.087 1.840 0.753
CH3CH2SH ethanethiol rCH 1.095 1.847 0.752
CH3CH2SH ethanethiol rCH 1.095 1.843 0.748
C4H6 1-Methylcyclopropene rCH 1.098 1.788 0.690
C4H6 1-Methylcyclopropene rCH 1.098 1.766 0.668
CH3SO2NH2 methanesulfonamide rCN 1.207 1.711 0.505
S4 Sulfur tetramer rSS 2.155 2.614 0.459
S4 Sulfur tetramer rSS 2.155 2.614 0.459
C4H6 1-Methylcyclopropene rCH 1.070 1.516 0.446
CH3CH2SH ethanethiol rCH 1.089 1.525 0.436
CH3CH2SH ethanethiol rCH 1.089 1.524 0.435
CH3CH2SH ethanethiol rCH 1.092 1.525 0.433
CH3CH2SH ethanethiol rCH 1.092 1.524 0.432
C4H10O Methyl propyl ether rCC 1.530 1.102 -0.428
C2H4F2 1,2-difluoroethane rCH 1.093 1.520 0.427
C2H4F2 1,2-difluoroethane rCH 1.093 1.507 0.414
C4H6 1-Methylcyclopropene rCC 1.515 1.102 -0.413
CH2CHCH2F Allyl Fluoride rHC 1.130 1.496 0.366
CH2CHCH2F Allyl Fluoride rHC 1.130 1.494 0.364
GaP Gallium monophosphide rPGa 2.450 2.090 -0.360
GaP Gallium monophosphide rPGa 2.450 2.090 -0.360
GaP Gallium monophosphide rPGa 2.450 2.090 -0.360
GaP Gallium monophosphide rPGa 2.450 2.090 -0.360
C3H3NO Isoxazole rCH 1.075 1.424 0.349
Ar2+ Argon diatomic cation rArAr 2.320 2.664 0.344
CH3CH2SH ethanethiol rCC 1.528 1.847 0.319
C4H10O Methyl propyl ether rCH 1.099 1.414 0.315
CH3CH2SH ethanethiol rCC 1.528 1.843 0.315
AlP Aluminum monophosphide rAlP 2.400 2.087 -0.313
AlP Aluminum monophosphide rAlP 2.400 2.087 -0.313
AlP Aluminum monophosphide rAlP 2.400 2.087 -0.313
CH3CH2SH ethanethiol rCS 1.820 1.524 -0.296
CH3CH2SH ethanethiol rCS 1.820 1.525 -0.295
ClOOCl Dichlorine dioxide rOCl 1.704 1.995 0.291
S4 Sulfur tetramer rSS 1.898 2.169 0.271
C2H2+ acetylene cation rCH 1.077 1.326 0.249
Si2H2 disilyne rSiSi 2.215 1.986 -0.229
Ar2 Argon diatomic rArAr 3.758 3.978 0.220
C4H6 1-Methylcyclopropene rCC 1.300 1.513 0.213
ClF3 Chlorine trifluoride rFCl 1.597 1.807 0.210
ClF3 Chlorine trifluoride rFCl 1.597 1.807 0.210
S3 Sulfur trimer rSS 1.917 2.125 0.208
GaP Gallium monophosphide rPGa 2.450 2.249 -0.201
GaP Gallium monophosphide rPGa 2.450 2.249 -0.201
GaP Gallium monophosphide rPGa 2.450 2.249 -0.201
GaP Gallium monophosphide rPGa 2.450 2.249 -0.201
Si2H2 disilyne rSiH 1.668 1.477 -0.191
ClOOCl Dichlorine dioxide rOO 1.426 1.235 -0.191
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
AlP Aluminum monophosphide rAlP 2.260 2.087 -0.173
AlP Aluminum monophosphide rAlP 2.260 2.087 -0.173
AlP Aluminum monophosphide rAlP 2.260 2.087 -0.173
Ne2+ Neon diatomic cation rNeNe 1.765 1.936 0.171
He2+ helium diatomic cation rHeHe 1.081 1.242 0.162
GaP Gallium monophosphide rPGa 2.250 2.090 -0.160
GaP Gallium monophosphide rPGa 2.250 2.090 -0.160
GaP Gallium monophosphide rPGa 2.250 2.090 -0.160
GaP Gallium monophosphide rPGa 2.250 2.090 -0.160
Si2H2 disilyne rSiH 1.668 1.509 -0.159
GaP Gallium monophosphide rPGa 2.240 2.090 -0.150
GaP Gallium monophosphide rPGa 2.240 2.090 -0.150
GaP Gallium monophosphide rPGa 2.240 2.090 -0.150
GaP Gallium monophosphide rPGa 2.240 2.090 -0.150
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.742 0.139
GaP Gallium monophosphide rPGa 2.110 2.249 0.139
GaP Gallium monophosphide rPGa 2.110 2.249 0.139
GaP Gallium monophosphide rPGa 2.110 2.249 0.139
GaP Gallium monophosphide rPGa 2.110 2.249 0.139
AlP Aluminum monophosphide rAlP 2.220 2.087 -0.133
AlP Aluminum monophosphide rAlP 2.220 2.087 -0.133
AlP Aluminum monophosphide rAlP 2.220 2.087 -0.133
N2 Nitrogen diatomic rNN 1.098 1.212 0.114
N2 Nitrogen diatomic rNN 1.098 1.212 0.114
ClF3 Chlorine trifluoride rFCl 1.697 1.807 0.110
ClF3 Chlorine trifluoride rFCl 1.697 1.807 0.110
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
N2 Nitrogen diatomic rNN 1.213 1.107 -0.105
ClF3 Chlorine trifluoride rFCl 1.597 1.702 0.105
ClF3 Chlorine trifluoride rFCl 1.597 1.702 0.105
Si2H2 disilyne rSiSi 2.215 2.113 -0.103
FSN Thiazyl fluoride rFS 1.643 1.741 0.098
ClOF3 Chlorine trifluoride oxide rFCl 1.713 1.809 0.096
Si2H2 disilyne rSiH 1.668 1.754 0.086
ClNO Nitrosyl chloride rNCl 1.975 2.061 0.086
SeF4 Selenium tetrafluoride rFSe 1.682 1.768 0.086
Si2H2 disilyne rSiSi 2.215 2.131 -0.085
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.623 0.084
ClF3 Chlorine trifluoride rFCl 1.697 1.780 0.083
ClF3 Chlorine trifluoride rFCl 1.697 1.780 0.083
CFCl chlorofluoromethylene rCCl 1.714 1.794 0.080
IF Iodine monofluoride rFI 1.910 1.987 0.078
N2O4 Dinitrogen tetroxide rNN 1.782 1.859 0.077
C2 Carbon diatomic rCC 1.243 1.317 0.075
OClO Chlorine dioxide rClO 1.470 1.543 0.074
SF4 Sulfur tetrafluoride rSF 1.545 1.618 0.073
OPCl Phosphorus oxychloride rPCl 2.059 2.130 0.072
NCl3 nitrogen trichloride rNCl 1.754 1.822 0.068
Cl2 Chlorine diatomic rClCl 1.988 2.056 0.068
SFCl Sulfur chloride fluoride rSCl 1.994 2.061 0.067
ICl Iodine monochloride rClI 2.321 2.388 0.067
C4H8O2 Ethyl acetate rCO 1.448 1.515 0.067
SiC silicon monocarbide rCSi 1.722 1.655 -0.067
ClF Chlorine monofluoride rFCl 1.628 1.694 0.066
SOF4 Sulfur tetrafluoride oxide rFS 1.596 1.662 0.066
SF4 Sulfur tetrafluoride rSF 1.646 1.711 0.065
B4H10 Tetraborane(10) rHB 1.484 1.421 -0.063
BrF Bromine monofluoride rFBr 1.759 1.821 0.063
SeF4 Selenium tetrafluoride rFSe 1.771 1.833 0.062
Cl2+ chlorine diatomic cation rClCl 1.892 1.954 0.062
SF2 sulfur difluoride rSF 1.587 1.649 0.061
SF6 Sulfur Hexafluoride rSF 1.561 1.622 0.061
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.098 0.060
CH2FI fluoroiodomethane rCI 2.140 2.199 0.060
HCO Formyl radical rCH 1.080 1.140 0.060
GaAs Gallium arsenide rGaAs 2.530 2.589 0.059
GaAs Gallium arsenide rGaAs 2.530 2.589 0.059
C2H2+ acetylene cation rCC 1.253 1.311 0.058
B2 Boron diatomic rBB 1.590 1.532 -0.058
C2H5NO3 Nitric acid, ethyl ester rNO 1.407 1.464 0.057
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.836 0.057
CH2BrF Methane, bromofluoro- rCBr 1.915 1.972 0.057
IBr Iodine monobromide rBrI 2.469 2.526 0.057
SFCl Sulfur chloride fluoride rFS 1.606 1.663 0.057
GeF4 Germanium tetrafluoride rFGe 1.670 1.727 0.057
SCl sulfur monochloride rSCl 1.975 2.032 0.057
GaAs Gallium arsenide rGaAs 2.530 2.587 0.057
GaAs Gallium arsenide rGaAs 2.530 2.587 0.057
BrCl Bromine monochloride rClBr 2.136 2.192 0.056
KOH Potassium hydroxide rOH 0.912 0.968 0.056
B2 Boron diatomic rBB 1.590 1.645 0.055
SiBr Silicon monobromide rSiBr 2.209 2.264 0.055
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.459 0.054
HSSSH trisulfane rSS 2.053 2.107 0.054
HSSSH trisulfane rSS 2.053 2.107 0.054
CH3CHNOH Acetaldoxime rCC 1.550 1.497 -0.053
SSO Disulfur monoxide rSS 1.884 1.938 0.053
SiF3 Silicon trifluoride radical rFSi 1.565 1.618 0.053
HSSSH trisulfane rSS 2.054 2.107 0.053
HSSSH trisulfane rSS 2.054 2.107 0.053
AsF Arsenic monofluoride rFAs 1.736 1.789 0.053
SF Monosulfur monofluoride rSF 1.599 1.651 0.052
HN3 hydrogen azide rNH 0.975 1.027 0.052
PF5 Phosphorus pentafluoride rPF 1.534 1.585 0.051
TiH Titanium monohydride rHTi 1.785 1.734 -0.051
FNO2 Nitryl fluoride rNF 1.467 1.517 0.050
HOCl hypochlorous acid rClO 1.697 1.747 0.050
161 molecules.