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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 MP3/daug-cc-pVDZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.245 3.160
C4H6 1-Methylcyclopropene rCH 1.087 3.452 2.365
C4H6 1-Methylcyclopropene rCC 1.476 2.280 0.804
S4 Sulfur tetramer rSS 2.155 2.924 0.769
C4H6 1-Methylcyclopropene rCH 1.087 1.842 0.755
CH3CH2SH ethanethiol rCH 1.095 1.848 0.753
C4H6 1-Methylcyclopropene rCH 1.098 1.792 0.694
C4H6 1-Methylcyclopropene rCH 1.098 1.777 0.679
ONNO NO dimer rNN 2.236 1.773 -0.463
C4H6 1-Methylcyclopropene rCH 1.070 1.524 0.454
S4 Sulfur tetramer rSS 2.155 2.604 0.449
CH3CH2SH ethanethiol rCH 1.089 1.534 0.445
CH3CH2SH ethanethiol rCH 1.092 1.534 0.442
C2H4F2 1,2-difluoroethane rCH 1.093 1.524 0.431
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C4H6 1-Methylcyclopropene rCC 1.515 1.099 -0.416
CH2CHCH2F Allyl Fluoride rHC 1.130 1.506 0.376
C3H3NO Isoxazole rCH 1.075 1.439 0.364
CH3CH2SH ethanethiol rCC 1.528 1.848 0.320
CH3CH2SH ethanethiol rCS 1.820 1.534 -0.286
S4 Sulfur tetramer rSS 1.898 2.166 0.268
C2H2+ acetylene cation rCH 1.077 1.327 0.250
C4H6 1-Methylcyclopropene rCC 1.300 1.529 0.229
N2 Nitrogen diatomic rNN 1.213 1.107 -0.106
N2 Nitrogen diatomic rNN 1.213 1.107 -0.106
N2O4 Dinitrogen tetroxide rNN 1.782 1.692 -0.090
C2H2+ acetylene cation rCC 1.253 1.331 0.078
AlBr Aluminum monobromide rAlBr 2.295 2.370 0.075
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.105 0.067
SiP Silicon monophosphide rSiP 2.078 2.012 -0.065
Cl2 Chlorine diatomic rClCl 1.988 2.052 0.064
LiBr Lithium Bromide rLiBr 2.170 2.234 0.064
Br2 Bromine diatomic rBrBr 2.281 2.340 0.059
Cl2+ chlorine diatomic cation rClCl 1.892 1.950 0.059
SFCl Sulfur chloride fluoride rSCl 1.994 2.051 0.057
BrCl Bromine monochloride rClBr 2.136 2.193 0.057
PF2 Phosphorus difluoride rPF 1.579 1.634 0.055
LiCl lithium chloride rLiCl 2.021 2.075 0.054
SiH2F2 difluorosilane rSiF 1.576 1.629 0.053
SiH3Cl chlorosilane rSiCl 2.051 2.102 0.052
40 molecules.