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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 B3LYP/6-311+G(3df,2p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.200 3.115
N2O3 Dinitrogen trioxide rNO 1.142 3.470 2.328
C4H6 1-Methylcyclopropene rCH 1.087 3.414 2.327
N2O3 Dinitrogen trioxide rNO 1.202 2.567 1.365
Ar2 Argon diatomic rArAr 3.758 4.853 1.095
C4H6 1-Methylcyclopropene rCC 1.476 2.256 0.780
CH3CH2SH ethanethiol rCH 1.095 1.837 0.742
CH3CH2SH ethanethiol rCH 1.095 1.837 0.742
CH3CH2SH ethanethiol rCH 1.095 1.832 0.737
C4H6 1-Methylcyclopropene rCH 1.087 1.823 0.736
N2O3 Dinitrogen trioxide rNN 1.864 1.130 -0.734
S4 Sulfur tetramer rSS 2.155 2.880 0.725
C4H6 1-Methylcyclopropene rCH 1.098 1.773 0.675
C4H6 1-Methylcyclopropene rCH 1.098 1.754 0.656
N2O3 Dinitrogen trioxide rNO 1.217 1.869 0.652
C4H4N2 Succinonitrile rCC 1.561 1.091 -0.470
C4H10O Methyl propyl ether rCC 1.530 1.092 -0.438
C4H6 1-Methylcyclopropene rCH 1.070 1.507 0.437
CH3CH2SH ethanethiol rCH 1.089 1.523 0.434
CH3CH2SH ethanethiol rCH 1.089 1.523 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 1.523 0.431
CH3CH2SH ethanethiol rCH 1.092 1.522 0.430
C4H6 1-Methylcyclopropene rCC 1.515 1.090 -0.425
C2H4F2 1,2-difluoroethane rCH 1.093 1.517 0.424
C4H4N2 Succinonitrile rCH 1.123 1.547 0.424
C2H4F2 1,2-difluoroethane rCH 1.093 1.504 0.411
S4 Sulfur tetramer rSS 2.155 2.558 0.403
ONNO NO dimer rNN 2.236 1.851 -0.386
CH2CHCH2F Allyl Fluoride rHC 1.130 1.493 0.363
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
C4H4N2 Succinonitrile rCH 1.111 1.458 0.347
C3H3NO Isoxazole rCH 1.075 1.420 0.345
C4H10O Methyl propyl ether rCH 1.099 1.408 0.309
CH3CH2SH ethanethiol rCC 1.528 1.837 0.309
CH3CH2SH ethanethiol rCC 1.528 1.837 0.309
CH3CH2SH ethanethiol rCC 1.528 1.832 0.304
CH3CH2SH ethanethiol rCS 1.820 1.522 -0.298
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
Si2H2 disilyne rSiSi 2.215 1.965 -0.250
C2H2+ acetylene cation rCH 1.077 1.320 0.243
S4 Sulfur tetramer rSS 1.898 2.130 0.232
Si2H2 disilyne rSiH 1.668 1.459 -0.209
C4H6 1-Methylcyclopropene rCC 1.300 1.508 0.208
Al2 Aluminum diatomic rAlAl 2.701 2.502 -0.199
Al2 Aluminum diatomic rAlAl 2.701 2.502 -0.199
Si2H2 disilyne rSiH 1.668 1.491 -0.177
S3 Sulfur trimer rSS 1.917 2.091 0.174
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
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 2.099 -0.116
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 2.112 -0.104
SiP Silicon monophosphide rSiP 2.078 1.981 -0.096
Si2 Silicon diatomic rSiSi 2.246 2.159 -0.087
He2+ helium diatomic cation rHeHe 1.081 1.146 0.065
C4H8O2 Ethyl acetate rCO 1.448 1.513 0.065
CH2ClCHCl2 1,1,2-trichloroethane rCC 1.580 1.516 -0.064
CH3CHNOH Acetaldoxime rCC 1.550 1.491 -0.059
CH2SHCH2SH 1,2-Ethanedithiol rSH 1.400 1.342 -0.058
GaCl3 Gallium trichloride rClGa 2.180 2.126 -0.054
GaAs Gallium arsenide rGaAs 2.530 2.583 0.053
CH3CHClCH2CH3 Butane, 2-chloro- rCCl 1.781 1.833 0.052
C3H3NO Isoxazole rCC 1.356 1.305 -0.051
Si2H2 disilyne rSiH 1.668 1.719 0.051
72 molecules.