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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 HF/6-31G

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
CH3SOCH3 Dimethyl sulfoxide rSO 1.485 1.725 0.240
C2H6O2S Dimethyl sulfone rSO 1.431 1.664 0.233
CH3CHClCH3 Propane, 2-chloro- rCCl 1.798 1.909 0.111
SiCl3CH3 methyltrichlorosilane rSiCl 2.026 2.154 0.128
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.912 0.131
C3H5Cl3 Propane, 1,2,3-trichloro- rCCl 1.790 1.901 0.111
CH2ClCH2CH2CH3 Butane, 1-chloro- rCCl 1.780 1.884 0.104
C3H3NO Isoxazole rCH 1.075 1.433 0.358
C2H4O3 trioxolane124 rCN 1.303 2.254 0.951
SiC silicon monocarbide rCSi 1.722 1.837 0.115
CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- rCCl 1.803 1.933 0.130
C4H10O Methyl propyl ether rCC 1.530 1.085 -0.445
C4H10O Methyl propyl ether rCH 1.099 1.423 0.324
CH2CHCHClCH3 1-Butene, 3-chloro- rCCl 1.813 1.917 0.104
CH3OCl methyl hypochlorite rOCl 1.674 1.775 0.101
CH3SSCH3 Disulfide, dimethyl rSS 2.038 2.211 0.173
CaO Calcium monoxide rOCa 1.822 2.226 0.404
CFCl chlorofluoromethylene rCCl 1.714 1.837 0.123
HCCl Chloromethylene rCCl 1.696 1.822 0.126
SF6 Sulfur Hexafluoride rSF 1.561 1.676 0.115
SO2F2 Sulfuryl fluoride rOS 1.405 1.598 0.193
SO2F2 Sulfuryl fluoride rFS 1.530 1.664 0.134
C4H6 1-Methylcyclopropene rCH 1.085 4.179 3.094
C4H6 1-Methylcyclopropene rCH 1.087 3.421 2.334
C4H6 1-Methylcyclopropene rCC 1.476 2.257 0.781
C4H6 1-Methylcyclopropene rCH 1.087 1.802 0.715
C4H6 1-Methylcyclopropene rCH 1.098 1.759 0.661
C4H6 1-Methylcyclopropene rCH 1.098 1.747 0.649
C4H6 1-Methylcyclopropene rCH 1.070 1.517 0.447
C4H6 1-Methylcyclopropene rCC 1.515 1.079 -0.436
C4H6 1-Methylcyclopropene rCC 1.300 1.516 0.216
CH3SO2NH2 methanesulfonamide rCN 1.207 1.725 0.518
CCl carbon monochloride rCCl 1.649 1.804 0.154
CBr Carbon monobromide rCBr 1.821 1.959 0.138
SiH2Cl2 dichlorosilane rSiCl 2.033 2.165 0.132
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.218 0.180
SO2 Sulfur dioxide rSO 1.432 1.554 0.122
SO3 Sulfur trioxide rSO 1.418 1.577 0.159
AlCl3 Aluminum trichloride rAlCl 2.060 2.164 0.104
KCl Potassium Chloride rKCl 2.667 2.845 0.179
HClO4 perchloric acid rOCl 1.414 2.359 0.945
HClO4 perchloric acid rOCl 1.404 2.104 0.700
HClO4 perchloric acid rOCl 1.641 1.757 0.116
H2SO4 Sulfuric acid rSO 1.422 1.622 0.200
H2SO4 Sulfuric acid rSO 1.574 1.693 0.119
KH Potassium hydride rKH 2.243 2.361 0.118
SOCl2 thionyl chloride rSO 1.443 1.598 0.155
SOCl2 thionyl chloride rSCl 2.076 2.219 0.143
PCl3 Phosphorus trichloride rPCl 2.043 2.195 0.152
Br2 Bromine diatomic rBrBr 2.281 2.426 0.145
KBr Potassium Bromide rKBr 2.821 2.967 0.146
CuCl Copper monochloride rCuCl 2.051 2.173 0.121
Cl2 Chlorine diatomic rClCl 1.988 2.157 0.169
Cl2+ chlorine diatomic cation rClCl 1.892 2.050 0.159
F2SO Thionyl Fluoride rOS 1.413 1.564 0.152
F2SO Thionyl Fluoride rFS 1.585 1.687 0.102
PF3 Phosphorus trifluoride rFP 1.561 1.663 0.102
SF4 Sulfur tetrafluoride rSF 1.545 1.666 0.121
CaBr2 Calcium dibromide rCaBr 2.616 2.766 0.150
PBr3 Phosphorus tribromide rPBr 2.220 2.332 0.112
ClF3 Chlorine trifluoride rFCl 1.597 1.699 0.102
SO2Cl2 Sulfuryl chloride rSO 1.443 1.622 0.179
SO2Cl2 Sulfuryl chloride rSCl 2.076 2.184 0.108
GeCl Germanium monochloride rClGe 2.164 2.296 0.132
CaBr Calcium monobromide rCaBr 2.594 2.825 0.231
ClSSCl Disulfur dichloride rSS 1.931 2.173 0.242
ClSSCl Disulfur dichloride rSCl 2.057 2.199 0.142
SiHCl3 Trichlorosilane rSiCl 2.020 2.147 0.127
Cl3PO Phosphoryl chloride rPCl 1.989 2.144 0.155
Cl3PO Phosphoryl chloride rPO 1.455 1.569 0.114
SiCl4 Silane, tetrachloro- rSiCl 2.019 2.136 0.117
PCl5 Phosphorus pentachloride rPCl 2.124 2.313 0.189
PCl5 Phosphorus pentachloride rPCl 2.020 2.175 0.155
OClO Chlorine dioxide rClO 1.470 1.706 0.237
S8 Octasulfur rSS 2.059 2.211 0.152
N2O4 Dinitrogen tetroxide rNN 1.782 1.620 -0.162
N2O3 Dinitrogen trioxide rNN 1.864 1.640 -0.224
SCl2 Sulfur dichloride rSCl 2.013 2.184 0.171
LiK Lithium Potassium rLiK 3.270 3.507 0.237
SiN Silicon nitride rSiN 1.575 1.804 0.229
VO Vanadium monoxide rVO 1.589 1.786 0.196
FO Oxygen monofluoride rFO 1.354 3.099 1.745
PO2 Phosphorus dioxide rPO 1.467 1.583 0.117
CaOH Calcium monohydroxide rOCa 1.976 2.087 0.111
Ne2 Neon diatomic rNeNe 3.100 2.928 -0.172
P4 Phosphorus tetramer rPP 2.210 2.359 0.149
As4 Arsenic tetramer rAsAs 2.435 2.541 0.106
NCl nitrogen monochloride rNCl 1.611 3.375 1.764
AlS Aluminum sulfide rAlS 2.029 2.157 0.128
PS phosphorus sulfide rPS 1.900 2.187 0.287
CP Carbon monophosphide rCP 1.562 1.683 0.121
NaLi lithium sodium rLiNa 2.889 2.999 0.110
NaO sodium monoxide rONa 2.052 1.936 -0.115
Ar2 Argon diatomic rArAr 3.758 4.551 0.793
Ar2+ Argon diatomic cation rArAr 2.320 2.586 0.266
S3 Sulfur trimer rSS 1.917 2.052 0.135
H2S2 Disulfane rSS 2.056 2.221 0.165
SiH3Cl chlorosilane rSiCl 2.051 2.190 0.139
F3PO Phosphoryl fluoride rFP 1.524 1.628 0.104
F3PO Phosphoryl fluoride rPO 1.436 1.540 0.104
SiCl2 Dichlorosilylene rSiCl 2.076 2.219 0.143
HSiBr monobromosilylene rSiBr 2.237 2.362 0.125
AlCl Aluminum monochloride rAlCl 2.130 2.293 0.163
ClF5 chlorinepentafluoride rFCl 1.650 1.754 0.104
FSSF Difluorodisulfane rSS 1.890 2.146 0.256
SOF4 Sulfur tetrafluoride oxide rSO 1.409 1.623 0.214
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.669 0.130
SOF4 Sulfur tetrafluoride oxide rFS 1.596 1.700 0.104
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.218 0.188
SF5Cl sulfur chloropentafluoride rFS 1.576 1.690 0.114
SF2 sulfur difluoride rSF 1.587 1.692 0.105
CaF Calcium monofluoride rFCa 1.967 2.090 0.123
SO Sulfur monoxide rSO 1.481 1.583 0.102
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.404 0.364
HSSSH trisulfane rHS 1.344 2.216 0.872
HSSSH trisulfane rSS 2.053 2.215 0.162
HSSSH trisulfane rSS 2.054 2.216 0.162
BrCl Bromine monochloride rClBr 2.136 2.290 0.154
PF2 Phosphorus difluoride rPF 1.579 1.682 0.103
HSiCl Chlorosilylene rSiCl 2.067 2.238 0.171
SiCl Clorosilylidyne rSiCl 2.061 2.240 0.179
CrH Chromium hydride rHCr 1.655 1.818 0.163
NBr nitrogen monobromide rNBr 1.765 2.862 1.097
Li2 Lithium diatomic rLiLi 2.673 2.816 0.143
Be2 Beryllium diatomic rBeBe 2.460 4.633 2.173
PO Phosphorus monoxide rPO 1.476 1.705 0.229
CaH Calcium monohydride rCaH 2.003 2.168 0.165
AlO Aluminum monoxide rAlO 1.618 1.762 0.145
SeCl2 Selenium Dichloride rClSe 2.157 2.290 0.133
SiBr Silicon monobromide rSiBr 2.209 2.363 0.154
SiBr+ Silicon monobromide cation rSiBr 2.095 2.213 0.118
MgCl magnesium monochloride rMgCl 2.199 2.308 0.109
ClO Monochlorine monoxide rClO 1.596 7.412 5.816
SCl sulfur monochloride rSCl 1.975 2.223 0.248
CaCl calcium monochloride rClCa 2.437 2.694 0.257
BrO Bromine monoxide rOBr 1.718 2.902 1.184
BrO+ Bromine monoxide cation rOBr 1.635 2.042 0.407
PF+ phosphorus monofluoride cation rFP 1.500 1.622 0.122
PF phosphorus monofluoride rFP 1.593 1.700 0.108
SF Monosulfur monofluoride rSF 1.599 1.705 0.105
GaCl Gallium monochloride rClGa 2.202 2.307 0.105
PCl phosphorus chloride rPCl 2.018 2.217 0.199
FSN Thiazyl fluoride rNS 1.448 1.562 0.114
BH3PH3 borane phosphine rBP 1.937 2.159 0.222
S4 Sulfur tetramer rSS 1.898 2.077 0.179
TiCl Titanium Monochloride rClTi 2.265 2.377 0.112
CaS Calcium sulfide rSCa 2.318 2.644 0.326
AlP Aluminum monophosphide rAlP 2.260 2.401 0.141
SSO Disulfur monoxide rSS 1.884 2.024 0.140
SSO Disulfur monoxide rSO 1.456 1.583 0.126
OPCl Phosphorus oxychloride rPCl 2.059 2.227 0.168
AlBr Aluminum monobromide rAlBr 2.295 2.420 0.125
S2 Sulfur diatomic rSS 1.889 2.005 0.116
AlN Aluminum nitride rNAl 1.786 1.911 0.124
Na2 Sodium diatomic rNaNa 3.079 3.189 0.110
K2 Potassium diatomic rKK 3.905 4.192 0.287
Mg2 Magnesium diatomic rMgMg 3.891 2.535 -1.356
ClS2 Sulfur chloride rSS 1.906 2.147 0.241
ClS2 Sulfur chloride rSCl 2.071 2.211 0.140
SFCl Sulfur chloride fluoride rSCl 1.994 2.173 0.179
CaC Calcium monocarbide rCCa 2.302 2.458 0.157
161 molecules.