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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 mPW1PW91/daug-cc-pVTZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.194 3.109
C4H6 1-Methylcyclopropene rCH 1.087 3.401 2.314
Ar2 Argon diatomic rArAr 3.758 4.633 0.875
C4H6 1-Methylcyclopropene rCC 1.476 2.249 0.773
C4H6 1-Methylcyclopropene rCH 1.087 1.822 0.735
CH3CH2SH ethanethiol rCH 1.095 1.825 0.730
CH3CH2SH ethanethiol rCH 1.095 1.821 0.726
S4 Sulfur tetramer rSS 2.155 2.853 0.698
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.753 0.655
ONNO NO dimer rNN 2.236 1.778 -0.458
C4H6 1-Methylcyclopropene rCH 1.070 1.500 0.430
CH3CH2SH ethanethiol rCH 1.089 1.516 0.427
CH3CH2SH ethanethiol rCH 1.089 1.515 0.426
C4H6 1-Methylcyclopropene rCC 1.515 1.090 -0.425
CH3CH2SH ethanethiol rCH 1.092 1.516 0.424
CH3CH2SH ethanethiol rCH 1.092 1.515 0.423
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.498 0.405
CH2CHCH2F Allyl Fluoride rHC 1.130 1.487 0.357
CH2CHCH2F Allyl Fluoride rHC 1.130 1.486 0.356
S4 Sulfur tetramer rSS 2.155 2.505 0.350
C3H3NO Isoxazole rCH 1.075 1.416 0.341
CH3CH2SH ethanethiol rCS 1.820 1.515 -0.305
CH3CH2SH ethanethiol rCS 1.820 1.516 -0.304
CH3CH2SH ethanethiol rCC 1.528 1.825 0.297
CH3CH2SH ethanethiol rCC 1.528 1.821 0.293
Si2H2 disilyne rSiSi 2.215 1.965 -0.250
C2H2+ acetylene cation rCH 1.077 1.316 0.239
S4 Sulfur tetramer rSS 1.898 2.112 0.214
Si2H2 disilyne rSiH 1.668 1.463 -0.205
C4H6 1-Methylcyclopropene rCC 1.300 1.500 0.200
Si2H2 disilyne rSiH 1.668 1.494 -0.174
Si2H2 disilyne rSiSi 2.215 2.090 -0.125
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
N2 Nitrogen diatomic rNN 1.213 1.089 -0.124
Si2H2 disilyne rSiSi 2.215 2.106 -0.110
SiP Silicon monophosphide rSiP 2.078 1.978 -0.099
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
N2 Nitrogen diatomic rNN 1.098 1.196 0.098
S4 Sulfur tetramer rSS 2.155 2.096 -0.059
C4H8O2 Ethyl acetate rCO 1.448 1.506 0.058
Si2H2 disilyne rSiH 1.668 1.724 0.056
C3H3NO Isoxazole rCC 1.356 1.302 -0.054
HCF Fluoromethylene rCH 1.138 1.086 -0.052
47 molecules.