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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 B2PLYP=FULL/Def2TZVPP

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 3.410 2.323
C4H6 1-Methylcyclopropene rCC 1.476 2.252 0.776
C4H6 1-Methylcyclopropene rCH 1.087 1.821 0.734
CH3CH2SH ethanethiol rCH 1.095 1.827 0.732
CH3CH2SH ethanethiol rCH 1.095 1.823 0.728
S4 Sulfur tetramer rSS 2.155 2.858 0.703
C4H6 1-Methylcyclopropene rCH 1.098 1.771 0.673
C4H6 1-Methylcyclopropene rCH 1.098 1.753 0.655
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
C4H6 1-Methylcyclopropene rCH 1.070 1.507 0.437
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.089 1.520 0.431
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
C4H6 1-Methylcyclopropene rCC 1.515 1.087 -0.428
CH3CH2SH ethanethiol rCH 1.092 1.520 0.428
S4 Sulfur tetramer rSS 2.155 2.582 0.427
S4 Sulfur tetramer rSS 2.155 2.581 0.426
C2H4F2 1,2-difluoroethane rCH 1.093 1.512 0.419
C2H4F2 1,2-difluoroethane rCH 1.093 1.500 0.407
Ar2 Argon diatomic rArAr 3.758 4.124 0.366
CH2CHCH2F Allyl Fluoride rHC 1.130 1.491 0.361
CH2CHCH2F Allyl Fluoride rHC 1.130 1.489 0.359
ONNO NO dimer rNN 2.236 1.888 -0.348
C3H3NO Isoxazole rCH 1.075 1.418 0.343
C4H10O Methyl propyl ether rCH 1.099 1.409 0.310
CH3CH2SH ethanethiol rCS 1.820 1.520 -0.300
CH3CH2SH ethanethiol rCC 1.528 1.827 0.299
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
CH3CH2SH ethanethiol rCC 1.528 1.823 0.295
Si2H2 disilyne rSiSi 2.215 1.973 -0.243
C2H2+ acetylene cation rCH 1.077 1.315 0.238
S4 Sulfur tetramer rSS 1.898 2.118 0.220
Si2H2 disilyne rSiH 1.668 1.456 -0.212
C4H6 1-Methylcyclopropene rCC 1.300 1.508 0.208
Si2H2 disilyne rSiH 1.668 1.485 -0.183
S3 Sulfur trimer rSS 1.917 2.083 0.166
Si2H2 disilyne rSiSi 2.215 2.100 -0.115
N2 Nitrogen diatomic rNN 1.213 1.098 -0.114
N2 Nitrogen diatomic rNN 1.213 1.098 -0.114
N2 Nitrogen diatomic rNN 1.098 1.211 0.113
N2 Nitrogen diatomic rNN 1.098 1.211 0.113
Si2H2 disilyne rSiSi 2.215 2.114 -0.101
SiP Silicon monophosphide rSiP 2.078 1.986 -0.092
C4H8O2 Ethyl acetate rCO 1.448 1.509 0.061
GaCl3 Gallium trichloride rClGa 2.180 2.120 -0.060
HCF Fluoromethylene rCH 1.138 1.084 -0.054
C2H2+ acetylene cation rCC 1.253 1.305 0.052
48 molecules.