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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 CCSD=FULL/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
C4H6 1-Methylcyclopropene rCH 1.087 3.406 2.319
C4H6 1-Methylcyclopropene rCC 1.476 2.251 0.775
C4H6 1-Methylcyclopropene rCH 1.087 1.821 0.734
CH3CH2SH ethanethiol rCH 1.095 1.818 0.723
CH3CH2SH ethanethiol rCH 1.095 1.814 0.719
S4 Sulfur tetramer rSS 2.155 2.849 0.694
C4H6 1-Methylcyclopropene rCH 1.098 1.771 0.673
C4H6 1-Methylcyclopropene rCH 1.098 1.755 0.657
ONNO NO dimer rNN 2.236 1.678 -0.558
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
C4H6 1-Methylcyclopropene rCH 1.070 1.502 0.432
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3CH2SH ethanethiol rCH 1.089 1.518 0.429
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
C4H6 1-Methylcyclopropene rCC 1.515 1.087 -0.428
CH3CH2SH ethanethiol rCH 1.092 1.518 0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.511 0.418
C2H4F2 1,2-difluoroethane rCH 1.093 1.500 0.407
CH2CHCH2F Allyl Fluoride rHC 1.130 1.492 0.362
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
S4 Sulfur tetramer rSS 2.155 2.504 0.349
C3H3NO Isoxazole rCH 1.075 1.422 0.347
CH3CH2SH ethanethiol rCS 1.820 1.518 -0.302
C4H10O Methyl propyl ether rCH 1.099 1.400 0.301
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
CH3CH2SH ethanethiol rCC 1.528 1.818 0.290
CH3CH2SH ethanethiol rCC 1.528 1.814 0.286
Si2H2 disilyne rSiSi 2.215 1.970 -0.246
C2H2+ acetylene cation rCH 1.077 1.309 0.232
S4 Sulfur tetramer rSS 1.898 2.109 0.211
Si2H2 disilyne rSiH 1.668 1.459 -0.209
C4H6 1-Methylcyclopropene rCC 1.300 1.505 0.205
Si2H2 disilyne rSiH 1.668 1.486 -0.182
S3 Sulfur trimer rSS 1.917 2.075 0.158
Ar2 Argon diatomic rArAr 3.758 3.884 0.126
N2 Nitrogen diatomic rNN 1.213 1.095 -0.118
N2 Nitrogen diatomic rNN 1.213 1.095 -0.118
Si2H2 disilyne rSiSi 2.215 2.098 -0.118
N2 Nitrogen diatomic rNN 1.098 1.207 0.109
N2 Nitrogen diatomic rNN 1.098 1.207 0.109
S4 Sulfur tetramer rSS 2.155 2.048 -0.107
Si2H2 disilyne rSiSi 2.215 2.109 -0.107
SiP Silicon monophosphide rSiP 2.078 1.983 -0.095
GaCl3 Gallium trichloride rClGa 2.180 2.111 -0.070
C3H3NO Isoxazole rCC 1.356 1.301 -0.055
HCF Fluoromethylene rCH 1.138 1.084 -0.054
ClNO Nitrosyl chloride rNCl 1.975 1.921 -0.054
C2H2+ acetylene cation rCC 1.253 1.303 0.051
49 molecules.