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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 B2PLYP=FULL/cc-pVDZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.238 3.153
C4H6 1-Methylcyclopropene rCH 1.087 3.434 2.347
C4H6 1-Methylcyclopropene rCC 1.476 2.272 0.796
S4 Sulfur tetramer rSS 2.155 2.919 0.764
HSSSH trisulfane rHS 1.344 2.097 0.754
HSSSH trisulfane rHS 1.344 2.097 0.754
C4H6 1-Methylcyclopropene rCH 1.087 1.841 0.754
CH3CH2SH ethanethiol rCH 1.095 1.842 0.747
CH3CH2SH ethanethiol rCH 1.095 1.839 0.744
C4H6 1-Methylcyclopropene rCH 1.098 1.789 0.691
C4H6 1-Methylcyclopropene rCH 1.098 1.770 0.672
S4 Sulfur tetramer rSS 2.155 2.664 0.509
S4 Sulfur tetramer rSS 2.155 2.664 0.509
CH3SO2NH2 methanesulfonamide rCN 1.207 1.711 0.504
C4H6 1-Methylcyclopropene rCH 1.070 1.515 0.445
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 1.516 0.423
C4H6 1-Methylcyclopropene rCC 1.515 1.100 -0.415
C2H4F2 1,2-difluoroethane rCH 1.093 1.505 0.412
CH2CHCH2F Allyl Fluoride rHC 1.130 1.498 0.368
CH2CHCH2F Allyl Fluoride rHC 1.130 1.496 0.366
C3H3NO Isoxazole rCH 1.075 1.426 0.351
GaP Gallium monophosphide rPGa 2.450 2.102 -0.348
GaP Gallium monophosphide rPGa 2.450 2.102 -0.348
GaP Gallium monophosphide rPGa 2.450 2.102 -0.348
GaP Gallium monophosphide rPGa 2.450 2.102 -0.348
CH3CH2SH ethanethiol rCC 1.528 1.842 0.314
CH3CH2SH ethanethiol rCC 1.528 1.839 0.311
C4H10O Methyl propyl ether rCH 1.099 1.408 0.309
AlP Aluminum monophosphide rAlP 2.400 2.101 -0.299
AlP Aluminum monophosphide rAlP 2.400 2.101 -0.299
AlP Aluminum monophosphide rAlP 2.400 2.101 -0.299
ONNO NO dimer rNN 2.236 1.940 -0.296
CH3CH2SH ethanethiol rCS 1.820 1.524 -0.296
CH3CH2SH ethanethiol rCS 1.820 1.525 -0.295
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.040 2.310 0.270
S4 Sulfur tetramer rSS 1.898 2.159 0.261
C2H2+ acetylene cation rCH 1.077 1.327 0.251
Ar2+ Argon diatomic cation rArAr 2.320 2.548 0.228
Si2H2 disilyne rSiSi 2.215 1.991 -0.224
C4H6 1-Methylcyclopropene rCC 1.300 1.516 0.216
S3 Sulfur trimer rSS 1.917 2.121 0.204
Si2H2 disilyne rSiH 1.668 1.467 -0.201
GaP Gallium monophosphide rPGa 2.450 2.258 -0.192
GaP Gallium monophosphide rPGa 2.450 2.258 -0.192
GaP Gallium monophosphide rPGa 2.450 2.258 -0.192
GaP Gallium monophosphide rPGa 2.450 2.258 -0.192
ClF3 Chlorine trifluoride rFCl 1.597 1.787 0.190
ClF3 Chlorine trifluoride rFCl 1.597 1.787 0.190
Ar2 Argon diatomic rArAr 3.758 3.936 0.178
Si2H2 disilyne rSiH 1.668 1.498 -0.170
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.400 2.239 -0.161
AlP Aluminum monophosphide rAlP 2.260 2.101 -0.159
AlP Aluminum monophosphide rAlP 2.260 2.101 -0.159
AlP Aluminum monophosphide rAlP 2.260 2.101 -0.159
GaP Gallium monophosphide rPGa 2.110 2.258 0.148
GaP Gallium monophosphide rPGa 2.110 2.258 0.148
GaP Gallium monophosphide rPGa 2.110 2.258 0.148
GaP Gallium monophosphide rPGa 2.110 2.258 0.148
GaP Gallium monophosphide rPGa 2.250 2.102 -0.148
GaP Gallium monophosphide rPGa 2.250 2.102 -0.148
GaP Gallium monophosphide rPGa 2.250 2.102 -0.148
GaP Gallium monophosphide rPGa 2.250 2.102 -0.148
GaP Gallium monophosphide rPGa 2.240 2.102 -0.138
GaP Gallium monophosphide rPGa 2.240 2.102 -0.138
GaP Gallium monophosphide rPGa 2.240 2.102 -0.138
GaP Gallium monophosphide rPGa 2.240 2.102 -0.138
Al2Cl6 Aluminum, di-μ-chlorotetrachlorodi- rAlCl 2.240 2.105 -0.135
ClOOCl Dichlorine dioxide rOCl 1.704 1.833 0.129
N2 Nitrogen diatomic rNN 1.098 1.221 0.124
N2 Nitrogen diatomic rNN 1.098 1.221 0.124
AlP Aluminum monophosphide rAlP 2.220 2.101 -0.119
AlP Aluminum monophosphide rAlP 2.220 2.101 -0.119
AlP Aluminum monophosphide rAlP 2.220 2.101 -0.119
ClOOCl Dichlorine dioxide rOO 1.426 1.318 -0.108
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.709 0.106
Be2 Beryllium diatomic rBeBe 2.460 2.563 0.103
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
N2 Nitrogen diatomic rNN 1.213 1.113 -0.100
Si2H2 disilyne rSiSi 2.215 2.119 -0.096
ClF3 Chlorine trifluoride rFCl 1.697 1.787 0.090
ClF3 Chlorine trifluoride rFCl 1.697 1.787 0.090
FSN Thiazyl fluoride rFS 1.643 1.733 0.090
C2 Carbon diatomic rCC 1.243 1.325 0.082
Si2H2 disilyne rSiSi 2.215 2.138 -0.077
OClO Chlorine dioxide rClO 1.470 1.544 0.074
SiF+ silicon monofluoride cation rFSi 1.527 1.597 0.071
Si2H2 disilyne rSiH 1.668 1.737 0.069
SOF4 Sulfur tetrafluoride oxide rFS 1.539 1.608 0.069
SiF3 Silicon trifluoride radical rFSi 1.565 1.634 0.069
C2H2+ acetylene cation rCC 1.253 1.321 0.069
ClF3 Chlorine trifluoride rFCl 1.597 1.664 0.067
ClF3 Chlorine trifluoride rFCl 1.597 1.664 0.067
C4H8O2 Ethyl acetate rCO 1.448 1.514 0.066
OPCl Phosphorus oxychloride rPCl 2.059 2.122 0.064
SiF2 Silicon difluoride rFSi 1.590 1.654 0.064
SO Sulfur monoxide rSO 1.481 1.544 0.063
SO Sulfur monoxide rSO 1.481 1.544 0.063
SF4 Sulfur tetrafluoride rSF 1.545 1.608 0.063
B2 Boron diatomic rBB 1.590 1.651 0.061
SiF silicon monofluoride rSiF 1.604 1.665 0.061
SiH2F2 difluorosilane rSiF 1.576 1.637 0.061
SF5Cl sulfur chloropentafluoride rSCl 2.030 2.091 0.061
SiHF3 trifluorosilane rSiF 1.563 1.623 0.060
CFCl chlorofluoromethylene rCCl 1.714 1.774 0.060
SiBr Silicon monobromide rSiBr 2.209 2.269 0.060
B4H10 Tetraborane(10) rHB 1.484 1.425 -0.059
SSO Disulfur monoxide rSS 1.884 1.943 0.059
ClOF3 Chlorine trifluoride oxide rFCl 1.713 1.772 0.059
AlCl Aluminum monochloride rAlCl 2.130 2.187 0.057
PF2 Phosphorus difluoride rPF 1.579 1.636 0.057
AlBr Aluminum monobromide rAlBr 2.295 2.352 0.057
SO2 Sulfur dioxide rSO 1.432 1.489 0.057
SSO Disulfur monoxide rSO 1.456 1.513 0.056
SiH3F monofluorosilane rSiF 1.595 1.651 0.056
ClNO Nitrosyl chloride rNCl 1.975 2.031 0.056
SF2 sulfur difluoride rSF 1.587 1.643 0.055
PF5 Phosphorus pentafluoride rPF 1.534 1.589 0.055
HCO Formyl radical rCH 1.080 1.135 0.055
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.460 0.055
B2 Boron diatomic rBB 1.590 1.535 -0.055
ClF3 Chlorine trifluoride rFCl 1.697 1.751 0.054
ClF3 Chlorine trifluoride rFCl 1.697 1.751 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
SO Sulfur monoxide rSO 1.481 1.535 0.054
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.092 0.054
SFCl Sulfur chloride fluoride rSCl 1.994 2.048 0.054
SO3 Sulfur trioxide rSO 1.418 1.471 0.053
C2H6O2S Dimethyl sulfone rSO 1.431 1.484 0.053
AlF Aluminum monofluoride rAlF 1.654 1.707 0.053
Cl2 Chlorine diatomic rClCl 1.988 2.040 0.052
CH3CHNOH Acetaldoxime rCC 1.550 1.498 -0.052
Cl2+ chlorine diatomic cation rClCl 1.892 1.943 0.051
HSiCl Chlorosilylene rSiCl 2.067 2.118 0.051
HN3 hydrogen azide rNH 0.975 1.026 0.051
NH2SH Thiohydroxylamine rNS 1.705 1.756 0.051
NH2SH Thiohydroxylamine rNS 1.705 1.756 0.051
GaAs Gallium arsenide rGaAs 2.530 2.581 0.051
SeF4 Selenium tetrafluoride rFSe 1.682 1.733 0.051
GaAs Gallium arsenide rGaAs 2.530 2.580 0.050
SOF4 Sulfur tetrafluoride oxide rFS 1.596 1.646 0.050
SiCl Clorosilylidyne rSiCl 2.061 2.112 0.050
SFCl Sulfur chloride fluoride rFS 1.606 1.656 0.050
ClF Chlorine monofluoride rFCl 1.628 1.678 0.050
155 molecules.