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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 MP2=FULL/6-31G

17 02 03 13 22
Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
CH3SOCH3 Dimethyl sulfoxide rSO 1.485 1.677 0.192
C2H6O2S Dimethyl sulfone rSO 1.431 1.632 0.201
C2H6O2S Dimethyl sulfone rCS 1.777 1.880 0.103
CH2BrCl Methane, bromochloro- rCCl 1.755 1.866 0.111
CH3CHClCH3 Propane, 2-chloro- rCCl 1.798 1.919 0.121
CHF2Cl difluorochloromethane rCCl 1.747 1.848 0.101
SiCl3CH3 methyltrichlorosilane rSiCl 2.026 2.186 0.160
CH2ClCHCl2 1,1,2-trichloroethane rCCl 1.776 1.882 0.106
ClCOClCO Oxalyl chloride rCCl 1.744 1.861 0.117
C6H4Cl2 1,4-dichlorobenzene rCCl 1.729 1.835 0.106
CH2ClCHO chloroacetaldehyde rCCl 1.782 1.887 0.105
C6H5Cl chlorobenzene rCCl 1.725 1.841 0.116
CH2CClCHCH2 1,3-Butadiene, 2-chloro- rCCl 1.742 1.852 0.110
CH2O2 Dioxirane rOO 1.516 1.649 0.134
C3H3NO Isoxazole rCH 1.075 1.437 0.362
C2H4O3 trioxolane124 rCN 1.303 2.314 1.010
CBrClF2 Methane, bromochlorodifluoro- rCCl 1.736 1.843 0.107
CF3OF Trifluoromethylhypofluorite rOF 1.421 1.532 0.111
C2H4S Thiirane rCS 1.815 1.942 0.127
CH2ClCH2CH3 Propane, 1-chloro- rCCl 1.796 1.903 0.107
CH2ClCH2CH3 Propane, 1-chloro- rCCl 1.796 1.899 0.103
C4H10O Methyl propyl ether rCC 1.530 1.100 -0.430
C4H10O Methyl propyl ether rCH 1.099 1.467 0.368
HCCCl Chloroacetylene rCCl 1.637 1.740 0.103
CH2FCl fluorochloromethane rCCl 1.762 1.868 0.106
CH3OCl methyl hypochlorite rOCl 1.674 1.861 0.187
CHFClBr fluorochlorobromomethane rCCl 1.745 1.853 0.108
CH3CCl2CH3 Propane, 2,2-dichloro- rCCl 1.799 1.899 0.100
CH3SSCH3 Disulfide, dimethyl rSS 2.038 2.267 0.229
CH2ClCCCl 1,3-dichloropropyne rCCl 1.779 1.910 0.132
CH2ClCCCl 1,3-dichloropropyne rCCl 1.638 1.738 0.100
CaO Calcium monoxide rOCa 1.822 2.043 0.221
SiF2 Silicon difluoride rFSi 1.590 1.704 0.114
CCl2 dichloromethylene rCCl 1.711 1.861 0.149
CFCl chlorofluoromethylene rCCl 1.714 1.894 0.180
C4H6S Thiophene, 2,5-dihydro- rCS 1.816 1.921 0.105
HCCl Chloromethylene rCCl 1.696 1.841 0.145
C2H2ClF 1-chloro-1-fluoroethylene rCCl 1.704 1.810 0.106
SF6 Sulfur Hexafluoride rSF 1.561 1.739 0.178
ClNO Nitrosyl chloride rNCl 1.975 2.203 0.228
SO2F2 Sulfuryl fluoride rFS 1.530 1.765 0.235
SO2F2 Sulfuryl fluoride rOS 1.405 1.565 0.160
C4H6 1-Methylcyclopropene rCH 1.085 4.243 3.158
C4H6 1-Methylcyclopropene rCH 1.087 3.473 2.386
C4H6 1-Methylcyclopropene rCC 1.476 2.292 0.816
C4H6 1-Methylcyclopropene rCH 1.087 1.832 0.745
C4H6 1-Methylcyclopropene rCH 1.098 1.784 0.686
C4H6 1-Methylcyclopropene rCH 1.098 1.774 0.676
C4H6 1-Methylcyclopropene rCH 1.070 1.544 0.474
C4H6 1-Methylcyclopropene rCC 1.515 1.092 -0.423
C4H6 1-Methylcyclopropene rCC 1.300 1.548 0.248
CH3SO2NH2 methanesulfonamide rCN 1.207 1.812 0.605
NHCl2 dichloroamine rNCl 1.760 1.913 0.153
CBr Carbon monobromide rCBr 1.821 1.947 0.126
SiH2Cl2 dichlorosilane rSiCl 2.033 2.194 0.161
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.275 0.237
CH2Cl chloromethyl radical rCCl 1.691 1.796 0.105
SeO2 Selenium dioxide rSeO 1.607 1.715 0.108
SO2 Sulfur dioxide rSO 1.432 1.633 0.201
SO3 Sulfur trioxide rSO 1.418 1.611 0.194
KCl Potassium Chloride rKCl 2.667 2.861 0.195
LiCl lithium chloride rLiCl 2.021 2.129 0.109
C2Cl2 dichloroacetylene rCCl 1.612 1.737 0.125
HClO4 perchloric acid rOCl 1.641 1.977 0.336
HClO4 perchloric acid rOCl 1.404 1.647 0.243
HClO4 perchloric acid rOCl 1.414 1.633 0.219
PF5 Phosphorus pentafluoride rPF 1.534 1.676 0.142
PF5 Phosphorus pentafluoride rFP 1.577 1.695 0.118
KH Potassium hydride rKH 2.243 2.378 0.135
SOCl2 thionyl chloride rSCl 2.076 2.463 0.387
SOCl2 thionyl chloride rSO 1.443 1.561 0.118
Br2 Bromine diatomic rBrBr 2.281 2.482 0.201
KBr Potassium Bromide rKBr 2.821 2.979 0.159
O2 Oxygen diatomic rOO 1.208 1.343 0.135
O2- oxygen diatomic anion rOO 1.350 1.483 0.133
Cl2+ chlorine diatomic cation rClCl 1.892 2.210 0.319
Cl2 Chlorine diatomic rClCl 1.988 2.230 0.242
F2SO Thionyl Fluoride rFS 1.585 1.795 0.209
F2SO Thionyl Fluoride rOS 1.413 1.549 0.136
NF3 Nitrogen trifluoride rNF 1.365 1.468 0.103
SF4 Sulfur tetrafluoride rSF 1.545 1.737 0.192
SF4 Sulfur tetrafluoride rSF 1.646 1.786 0.140
AsCl3 Arsenous trichloride rClAs 2.166 2.316 0.151
BrF3 Bromine trifluoride rFBr 1.721 1.860 0.139
BrF3 Bromine trifluoride rFBr 1.810 1.927 0.117
KF Potassium Fluoride rKF 2.171 2.276 0.105
FNO Nitrosyl fluoride rNF 1.512 1.648 0.136
BrF5 bromine pentafluoride rFBr 1.689 1.880 0.191
BrF5 bromine pentafluoride rFBr 1.774 1.904 0.130
CaBr2 Calcium dibromide rCaBr 2.616 2.783 0.167
PBr3 Phosphorus tribromide rPBr 2.220 2.387 0.167
SiBr4 Silicon tetrabromide rSiBr 2.183 2.283 0.100
ClF Chlorine monofluoride rFCl 1.628 1.785 0.157
ClF3 Chlorine trifluoride rFCl 1.697 1.908 0.211
ClF3 Chlorine trifluoride rFCl 1.597 1.791 0.194
HOCl hypochlorous acid rClO 1.697 1.854 0.157
GeCl Germanium monochloride rClGe 2.164 2.312 0.148
FNO2 Nitryl fluoride rNF 1.467 1.621 0.154
CaBr Calcium monobromide rCaBr 2.594 2.838 0.245
ClSSCl Disulfur dichloride rSS 1.931 2.197 0.266
ClSSCl Disulfur dichloride rSCl 2.057 2.283 0.226
NCl3 nitrogen trichloride rNCl 1.754 1.959 0.205
OClO Chlorine dioxide rClO 1.470 1.704 0.234
GeCl2 Germanium dichloride rClGe 2.186 2.303 0.117
SiO Silicon monoxide rSiO 1.510 1.630 0.121
S8 Octasulfur rSS 2.059 2.275 0.216
N2O3 Dinitrogen trioxide rNN 1.864 2.129 0.265
SCl2 Sulfur dichloride rSCl 2.013 2.252 0.239
SiF+ silicon monofluoride cation rFSi 1.527 1.652 0.126
SiF silicon monofluoride rSiF 1.604 1.720 0.116
LiK Lithium Potassium rLiK 3.270 3.499 0.229
NS+ nitrogen sulfide cation rNS 1.440 1.634 0.194
NS Mononitrogen monosulfide rNS 1.497 1.629 0.132
FO Oxygen monofluoride rFO 1.354 1.524 0.170
GaP Gallium monophosphide rPGa 2.450 2.316 -0.134
SiP Silicon monophosphide rSiP 2.078 2.226 0.149
PO2 Phosphorus dioxide rPO 1.467 1.599 0.132
CaOH Calcium monohydroxide rOCa 1.976 2.103 0.127
Ne2 Neon diatomic rNeNe 3.100 2.841 -0.259
P2 Phosphorus diatomic rPP 1.893 2.077 0.184
Se2 Selenium diatomic rSeSe 2.166 2.340 0.174
As4 Arsenic tetramer rAsAs 2.435 2.629 0.194
Cu2 Copper diatomic rCuCu 2.220 2.053 -0.166
NCl nitrogen monochloride rNCl 1.611 1.763 0.152
PS phosphorus sulfide rPS 1.900 2.069 0.169
ClOOCl Dichlorine dioxide rOCl 1.704 1.900 0.196
NaLi lithium sodium rLiNa 2.889 2.992 0.103
LiS Lithium monosulfide rLiS 2.150 2.258 0.109
SiS silicon monosulfide rSiS 1.929 2.063 0.134
Ar2 Argon diatomic rArAr 3.758 4.411 0.653
Ar2+ Argon diatomic cation rArAr 2.320 2.620 0.300
S3 Sulfur trimer rSS 1.917 2.144 0.227
Si2 Silicon diatomic rSiSi 2.246 2.400 0.154
BrNO Nitrosyl bromide rNBr 2.140 2.320 0.180
H2S2 Disulfane rSS 2.056 2.282 0.226
SeF4 Selenium tetrafluoride rFSe 1.682 1.784 0.102
SiHF3 trifluorosilane rSiF 1.563 1.672 0.109
SiH3Br bromosilane rSiBr 2.210 2.327 0.117
SiH3Cl chlorosilane rSiCl 2.051 2.215 0.165
HOBr Hypobromous acid rBrO 1.834 1.952 0.118
SiH3F monofluorosilane rSiF 1.595 1.710 0.115
HSiBr monobromosilylene rSiBr 2.237 2.375 0.138
AlCl Aluminum monochloride rAlCl 2.130 2.305 0.175
ClF5 chlorinepentafluoride rFCl 1.650 1.803 0.153
FSSF Difluorodisulfane rSS 1.890 2.174 0.284
FSSF Difluorodisulfane rFS 1.635 1.778 0.143
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.759 0.220
SOF4 Sulfur tetrafluoride oxide rFS 1.596 1.767 0.171
SOF4 Sulfur tetrafluoride oxide rSO 1.409 1.556 0.147
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.325 0.295
SF5Cl sulfur chloropentafluoride rFS 1.576 1.753 0.177
SF2 sulfur difluoride rSF 1.587 1.747 0.159
SiH2F2 difluorosilane rSiF 1.576 1.690 0.115
CaF Calcium monofluoride rFCa 1.967 2.117 0.150
SO Sulfur monoxide rOS 1.500 1.760 0.260
SO Sulfur monoxide rSO 1.481 1.631 0.149
SO+ sulfur monoxide cation rOS 1.424 1.540 0.116
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.425 0.385
HSSSH trisulfane rHS 1.344 2.277 0.934
HSSSH trisulfane rSS 2.053 2.277 0.224
HSSSH trisulfane rSS 2.054 2.277 0.223
BrCl Bromine monochloride rClBr 2.136 2.354 0.218
BrF Bromine monofluoride rFBr 1.759 1.872 0.113
PF2 Phosphorus difluoride rPF 1.579 1.718 0.139
HSiCl Chlorosilylene rSiCl 2.067 2.259 0.192
SiCl Clorosilylidyne rSiCl 2.061 2.257 0.196
CrH Chromium hydride rHCr 1.655 1.798 0.143
NBr nitrogen monobromide rNBr 1.765 1.876 0.111
NH2SH Thiohydroxylamine rNS 1.719 1.821 0.102
Li2 Lithium diatomic rLiLi 2.673 2.806 0.133
Be2 Beryllium diatomic rBeBe 2.460 4.152 1.692
PO- phosphorus monoxide anion rOP 1.540 1.715 0.175
PO Phosphorus monoxide rPO 1.476 1.639 0.163
CaH Calcium monohydride rCaH 2.003 2.182 0.180
SeCl2 Selenium Dichloride rClSe 2.157 2.349 0.192
H2O3 Hydrogen trioxide rOO 1.428 1.538 0.110
SiBr Silicon monobromide rSiBr 2.209 2.372 0.163
SiBr+ Silicon monobromide cation rSiBr 2.095 2.234 0.138
SiF3 Silicon trifluoride radical rFSi 1.565 1.683 0.118
ClO Monochlorine monoxide rClO 1.596 1.696 0.100
SCl sulfur monochloride rSCl 1.975 2.161 0.186
CaCl calcium monochloride rClCa 2.437 2.712 0.275
PF+ phosphorus monofluoride cation rFP 1.500 1.654 0.154
SF Monosulfur monofluoride rSF 1.599 1.737 0.138
C3H5Cl 1-chloro-1-propene(Z) rCCl 1.735 1.837 0.102
C3H5Cl 1-chloro-1-propene(E) rCCl 1.728 1.833 0.105
GaCl Gallium monochloride rClGa 2.202 2.318 0.116
PN Phosphorus mononitride rPN 1.491 1.656 0.166
FSN Thiazyl fluoride rFS 1.643 1.919 0.276
BH3PH3 borane phosphine rBP 1.937 2.067 0.130
CaS Calcium sulfide rSCa 2.318 2.649 0.331
AlP Aluminum monophosphide rAlP 2.220 2.112 -0.108
SSO Disulfur monoxide rSS 1.884 2.115 0.231
SSO Disulfur monoxide rSO 1.456 1.656 0.200
OPCl Phosphorus oxychloride rPCl 2.059 2.327 0.269
OPCl Phosphorus oxychloride rPO 1.462 1.609 0.147
AlBr Aluminum monobromide rAlBr 2.295 2.423 0.128
S2+ sulfur diatomic cation rSS 1.825 2.182 0.357
S2 Sulfur diatomic rSS 1.889 2.127 0.238
As2 Arsenic diatomic rAsAs 2.103 2.220 0.118
AlN Aluminum nitride rNAl 1.786 1.906 0.119
S2N2 Disulfur dinitride rNS 1.642 1.940 0.298
Na2 Sodium diatomic rNaNa 3.079 3.184 0.105
K2 Potassium diatomic rKK 3.905 4.199 0.294
AsN Arsenic mononitride rNAs 1.618 1.768 0.150
Mg2 Magnesium diatomic rMgMg 3.891 5.249 1.359
ClOF3 Chlorine trifluoride oxide rFCl 1.603 2.509 0.906
ClOF3 Chlorine trifluoride oxide rFCl 1.713 2.269 0.556
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.565 0.160
Al2 Aluminum diatomic rAlAl 2.701 2.573 -0.128
Si2H2 disilyne rSiSi 2.215 2.365 0.150
HOSH hydrogen thioperoxide rSO 1.662 1.830 0.168
SFCl Sulfur chloride fluoride rSCl 1.994 2.240 0.246
SFCl Sulfur chloride fluoride rFS 1.606 1.758 0.152
CaC Calcium monocarbide rCCa 2.302 2.483 0.182
215 molecules.