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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 B1B95/6-311+G(3df,2p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.190 3.105
C4H6 1-Methylcyclopropene rCH 1.087 3.395 2.308
C4H6 1-Methylcyclopropene rCC 1.476 2.245 0.769
C4H6 1-Methylcyclopropene rCH 1.087 1.819 0.732
CH3CH2SH ethanethiol rCH 1.095 1.816 0.721
CH3CH2SH ethanethiol rCH 1.095 1.812 0.717
C4H6 1-Methylcyclopropene rCH 1.098 1.769 0.671
S4 Sulfur tetramer rSS 2.155 2.819 0.664
C4H6 1-Methylcyclopropene rCH 1.098 1.750 0.652
ONNO NO dimer rNN 2.236 1.779 -0.457
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
C4H6 1-Methylcyclopropene rCC 1.515 1.088 -0.427
C4H6 1-Methylcyclopropene rCH 1.070 1.497 0.427
CH3CH2SH ethanethiol rCH 1.089 1.515 0.426
CH3CH2SH ethanethiol rCH 1.089 1.513 0.424
CH3CH2SH ethanethiol rCH 1.092 1.515 0.423
CH3CH2SH ethanethiol rCH 1.092 1.513 0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.509 0.416
C2H4F2 1,2-difluoroethane rCH 1.093 1.496 0.403
CH2CHCH2F Allyl Fluoride rHC 1.130 1.485 0.355
CH2CHCH2F Allyl Fluoride rHC 1.130 1.485 0.355
C3H3NO Isoxazole rCH 1.075 1.413 0.338
S4 Sulfur tetramer rSS 2.155 2.490 0.335
CH3CH2SH ethanethiol rCS 1.820 1.513 -0.307
CH3CH2SH ethanethiol rCS 1.820 1.515 -0.305
C4H10O Methyl propyl ether rCH 1.099 1.397 0.298
Ar2 Argon diatomic rArAr 3.758 4.048 0.290
CH3CH2SH ethanethiol rCC 1.528 1.816 0.288
CH3CH2SH ethanethiol rCC 1.528 1.812 0.284
Si2H2 disilyne rSiSi 2.215 1.959 -0.257
C2H2+ acetylene cation rCH 1.077 1.312 0.235
Si2H2 disilyne rSiH 1.668 1.460 -0.208
S4 Sulfur tetramer rSS 1.898 2.095 0.197
C4H6 1-Methylcyclopropene rCC 1.300 1.496 0.196
Si2H2 disilyne rSiH 1.668 1.488 -0.180
Si2H2 disilyne rSiSi 2.215 2.080 -0.136
N2 Nitrogen diatomic rNN 1.213 1.088 -0.125
N2 Nitrogen diatomic rNN 1.213 1.088 -0.125
N2 Nitrogen diatomic rNN 1.213 1.088 -0.125
N2 Nitrogen diatomic rNN 1.213 1.088 -0.125
Si2H2 disilyne rSiSi 2.215 2.099 -0.117
SiP Silicon monophosphide rSiP 2.078 1.967 -0.110
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
GaCl3 Gallium trichloride rClGa 2.180 2.107 -0.073
He2+ helium diatomic cation rHeHe 1.081 1.140 0.059
C3H3NO Isoxazole rCC 1.356 1.299 -0.057
C4H8O2 Ethyl acetate rCO 1.448 1.504 0.056
C3H5 Allyl radical rCC 1.428 1.375 -0.053
HCF Fluoromethylene rCH 1.138 1.087 -0.051
F2+ flourine diatomic cation rFF 1.322 1.271 -0.051
H2O2 Hydrogen peroxide rOO 1.475 1.424 -0.051
H2O2 Hydrogen peroxide rOO 1.475 1.424 -0.051
53 molecules.