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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 wB97X-D/CEP-121G*

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.232 3.147
C4H6 1-Methylcyclopropene rCH 1.087 3.442 2.355
C4H6 1-Methylcyclopropene rCC 1.476 2.271 0.795
CH3CH2SH ethanethiol rCH 1.095 1.846 0.751
CH3CH2SH ethanethiol rCH 1.095 1.843 0.748
C4H6 1-Methylcyclopropene rCH 1.087 1.833 0.746
S4 Sulfur tetramer rSS 2.155 2.887 0.732
C4H6 1-Methylcyclopropene rCH 1.098 1.783 0.685
C4H6 1-Methylcyclopropene rCH 1.098 1.767 0.669
ONNO NO dimer rNN 2.236 1.684 -0.552
CH3SO2NH2 methanesulfonamide rCN 1.207 1.698 0.492
C4H6 1-Methylcyclopropene rCH 1.070 1.516 0.446
CH3CH2SH ethanethiol rCH 1.089 1.535 0.446
CH3CH2SH ethanethiol rCH 1.089 1.534 0.445
CH3CH2SH ethanethiol rCH 1.092 1.535 0.443
CH3CH2SH ethanethiol rCH 1.092 1.534 0.442
C2H4F2 1,2-difluoroethane rCH 1.093 1.529 0.436
C4H10O Methyl propyl ether rCC 1.530 1.098 -0.432
C2H4F2 1,2-difluoroethane rCH 1.093 1.517 0.424
C4H6 1-Methylcyclopropene rCC 1.515 1.097 -0.418
CH2CHCH2F Allyl Fluoride rHC 1.130 1.508 0.378
CH2CHCH2F Allyl Fluoride rHC 1.130 1.506 0.376
S4 Sulfur tetramer rSS 2.155 2.524 0.369
C3H3NO Isoxazole rCH 1.075 1.432 0.357
CH3CH2SH ethanethiol rCC 1.528 1.846 0.318
C4H10O Methyl propyl ether rCH 1.099 1.415 0.316
CH3CH2SH ethanethiol rCC 1.528 1.843 0.315
CH3CH2SH ethanethiol rCS 1.820 1.534 -0.286
CH3CH2SH ethanethiol rCS 1.820 1.535 -0.285
C2H2+ acetylene cation rCH 1.077 1.325 0.249
Si2H2 disilyne rSiSi 2.215 1.970 -0.245
S4 Sulfur tetramer rSS 1.898 2.137 0.239
C4H6 1-Methylcyclopropene rCC 1.300 1.516 0.216
Si2H2 disilyne rSiH 1.668 1.478 -0.190
S3 Sulfur trimer rSS 1.917 2.106 0.189
Si2H2 disilyne rSiH 1.668 1.511 -0.157
ClF3 Chlorine trifluoride rFCl 1.597 1.749 0.152
ClF3 Chlorine trifluoride rFCl 1.597 1.749 0.152
N2 Nitrogen diatomic rNN 1.098 1.217 0.119
N2 Nitrogen diatomic rNN 1.098 1.217 0.119
N2 Nitrogen diatomic rNN 1.213 1.104 -0.109
N2 Nitrogen diatomic rNN 1.213 1.104 -0.109
N2 Nitrogen diatomic rNN 1.213 1.104 -0.109
N2 Nitrogen diatomic rNN 1.213 1.104 -0.109
Si2H2 disilyne rSiSi 2.215 2.111 -0.104
He2+ helium diatomic cation rHeHe 1.081 1.178 0.097
Si2H2 disilyne rSiSi 2.215 2.121 -0.095
Si2H2 disilyne rSiH 1.668 1.749 0.081
SiP Silicon monophosphide rSiP 2.078 2.002 -0.076
C4H8O2 Ethyl acetate rCO 1.448 1.524 0.076
ClOF3 Chlorine trifluoride oxide rFCl 1.603 1.668 0.065
N2O4 Dinitrogen tetroxide rNN 1.782 1.718 -0.064
CFCl chlorofluoromethylene rCCl 1.714 1.770 0.056
FSN Thiazyl fluoride rFS 1.643 1.699 0.056
C2H2+ acetylene cation rCC 1.253 1.308 0.056
OClO Chlorine dioxide rClO 1.470 1.525 0.055
ClF3 Chlorine trifluoride rFCl 1.697 1.749 0.052
ClF3 Chlorine trifluoride rFCl 1.697 1.749 0.052
BH3PH3 borane phosphine rBP 1.937 1.988 0.051
ClOF3 Chlorine trifluoride oxide rOCl 1.405 1.456 0.051
60 molecules.