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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 B3LYPultrafine/daug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.199 3.114
C4H6 1-Methylcyclopropene rCH 1.087 3.414 2.327
Ar2 Argon diatomic rArAr 3.758 4.851 1.093
C4H6 1-Methylcyclopropene rCC 1.476 2.256 0.780
CH3CH2SH ethanethiol rCH 1.095 1.843 0.748
CH3CH2SH ethanethiol rCH 1.095 1.839 0.744
S4 Sulfur tetramer rSS 2.155 2.896 0.741
C4H6 1-Methylcyclopropene rCH 1.087 1.823 0.736
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.754 0.656
C4H6 1-Methylcyclopropene rCH 1.070 1.507 0.437
CH3CH2SH ethanethiol rCH 1.089 1.523 0.434
CH3CH2SH ethanethiol rCH 1.089 1.522 0.433
CH3CH2SH ethanethiol rCH 1.092 1.523 0.431
CH3CH2SH ethanethiol rCH 1.092 1.522 0.430
C4H6 1-Methylcyclopropene rCC 1.515 1.089 -0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.517 0.424
S4 Sulfur tetramer rSS 2.155 2.568 0.413
C2H4F2 1,2-difluoroethane rCH 1.093 1.503 0.410
ONNO NO dimer rNN 2.236 1.850 -0.386
CH2CHCH2F Allyl Fluoride rHC 1.130 1.492 0.362
CH2CHCH2F Allyl Fluoride rHC 1.130 1.490 0.360
C3H3NO Isoxazole rCH 1.075 1.421 0.346
CH3CH2SH ethanethiol rCC 1.528 1.843 0.315
CH3CH2SH ethanethiol rCC 1.528 1.839 0.311
CH3CH2SH ethanethiol rCS 1.820 1.522 -0.298
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
Si2H2 disilyne rSiSi 2.215 1.969 -0.246
C2H2+ acetylene cation rCH 1.077 1.321 0.244
S4 Sulfur tetramer rSS 1.898 2.141 0.243
Si2H2 disilyne rSiH 1.668 1.460 -0.208
C4H6 1-Methylcyclopropene rCC 1.300 1.508 0.208
Si2H2 disilyne rSiH 1.668 1.493 -0.175
N2 Nitrogen diatomic rNN 1.213 1.091 -0.121
N2 Nitrogen diatomic rNN 1.213 1.091 -0.121
N2 Nitrogen diatomic rNN 1.213 1.091 -0.121
N2 Nitrogen diatomic rNN 1.213 1.091 -0.121
Si2H2 disilyne rSiSi 2.215 2.104 -0.111
N2 Nitrogen diatomic rNN 1.098 1.201 0.104
N2 Nitrogen diatomic rNN 1.098 1.201 0.104
Si2H2 disilyne rSiSi 2.215 2.117 -0.098
SiP Silicon monophosphide rSiP 2.078 1.989 -0.089
C4H8O2 Ethyl acetate rCO 1.448 1.512 0.064
Si2H2 disilyne rSiH 1.668 1.726 0.058
GaAs Gallium arsenide rGaAs 2.530 2.588 0.058
GaAs Gallium arsenide rGaAs 2.530 2.583 0.053
C3H3NO Isoxazole rCC 1.356 1.305 -0.051
GaBr Gallium monobromide rGaBr 2.352 2.403 0.050
HCF Fluoromethylene rCH 1.138 1.088 -0.050
49 molecules.