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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 wB97X-D/6-311+G(3df,2p)

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.191 3.106
C4H6 1-Methylcyclopropene rCH 1.087 3.407 2.320
C4H6 1-Methylcyclopropene rCC 1.476 2.254 0.778
C4H6 1-Methylcyclopropene rCH 1.087 1.824 0.737
CH3CH2SH ethanethiol rCH 1.095 1.822 0.727
CH3CH2SH ethanethiol rCH 1.095 1.818 0.723
S4 Sulfur tetramer rSS 2.155 2.844 0.689
C4H6 1-Methylcyclopropene rCH 1.098 1.774 0.676
C4H6 1-Methylcyclopropene rCH 1.098 1.756 0.658
ONNO NO dimer rNN 2.236 1.723 -0.514
Ar2 Argon diatomic rArAr 3.758 4.225 0.467
C4H10O Methyl propyl ether rCC 1.530 1.092 -0.438
C4H6 1-Methylcyclopropene rCH 1.070 1.504 0.434
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.089 1.519 0.430
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
CH3CH2SH ethanethiol rCH 1.092 1.519 0.427
C4H6 1-Methylcyclopropene rCC 1.515 1.090 -0.425
C2H4F2 1,2-difluoroethane rCH 1.093 1.516 0.423
C2H4F2 1,2-difluoroethane rCH 1.093 1.502 0.409
CH2CHCH2F Allyl Fluoride rHC 1.130 1.492 0.362
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
C3H3NO Isoxazole rCH 1.075 1.418 0.343
S4 Sulfur tetramer rSS 2.155 2.472 0.317
CH3CH2SH ethanethiol rCS 1.820 1.519 -0.301
C4H10O Methyl propyl ether rCH 1.099 1.398 0.299
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
CH3CH2SH ethanethiol rCC 1.528 1.822 0.294
CH3CH2SH ethanethiol rCC 1.528 1.818 0.290
CaC Calcium monocarbide rCCa 2.302 2.024 -0.277
Si2H2 disilyne rSiSi 2.215 1.952 -0.264
C2H2+ acetylene cation rCH 1.077 1.320 0.243
Si2H2 disilyne rSiH 1.668 1.459 -0.209
S4 Sulfur tetramer rSS 1.898 2.104 0.206
C4H6 1-Methylcyclopropene rCC 1.300 1.506 0.206
Si2H2 disilyne rSiH 1.668 1.488 -0.180
S3 Sulfur trimer rSS 1.917 2.074 0.157
Si2H2 disilyne rSiSi 2.215 2.073 -0.142
Si2H2 disilyne rSiSi 2.215 2.089 -0.127
N2 Nitrogen diatomic rNN 1.213 1.088 -0.124
N2 Nitrogen diatomic rNN 1.213 1.088 -0.124
SiP Silicon monophosphide rSiP 2.078 1.965 -0.113
S4 Sulfur tetramer rSS 2.155 2.048 -0.107
N2 Nitrogen diatomic rNN 1.098 1.198 0.101
N2 Nitrogen diatomic rNN 1.098 1.198 0.101
GaCl3 Gallium trichloride rClGa 2.180 2.107 -0.073
C4H8O2 Ethyl acetate rCO 1.448 1.510 0.062
N2O4 Dinitrogen tetroxide rNN 1.782 1.724 -0.058
C3H3NO Isoxazole rCC 1.356 1.301 -0.055
He2+ helium diatomic cation rHeHe 1.081 1.136 0.055
H2O2 Hydrogen peroxide rOO 1.475 1.422 -0.053
H2O2 Hydrogen peroxide rOO 1.475 1.422 -0.053
F2+ flourine diatomic cation rFF 1.322 1.270 -0.052
53 molecules.