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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 QCISD(T)=FULL/Def2TZVPP

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
CH3CH2SH ethanethiol rCH 1.095 1.825 0.730
S4 Sulfur tetramer rSS 2.155 2.859 0.704
C4H10O Methyl propyl ether rCC 1.530 1.091 -0.439
CH3CH2SH ethanethiol rCH 1.089 1.524 0.435
CH3CH2SH ethanethiol rCH 1.092 1.524 0.432
C2H4F2 1,2-difluoroethane rCH 1.093 1.515 0.422
C2H4F2 1,2-difluoroethane rCH 1.093 1.503 0.410
S4 Sulfur tetramer rSS 2.155 2.550 0.395
CH2CHCH2F Allyl Fluoride rHC 1.130 1.496 0.366
C4H10O Methyl propyl ether rCH 1.099 1.411 0.312
CH3CH2SH ethanethiol rCC 1.528 1.825 0.297
CH3CH2SH ethanethiol rCS 1.820 1.524 -0.296
Ar2 Argon diatomic rArAr 3.758 4.031 0.273
C2H2+ acetylene cation rCH 1.077 1.316 0.240
Si2H2 disilyne rSiSi 2.215 1.986 -0.229
S4 Sulfur tetramer rSS 1.898 2.120 0.222
Si2H2 disilyne rSiH 1.668 1.460 -0.208
Si2H2 disilyne rSiH 1.668 1.486 -0.182
S3 Sulfur trimer rSS 1.917 2.088 0.171
CaO Calcium monoxide rOCa 1.822 1.656 -0.166
N2 Nitrogen diatomic rNN 1.098 1.218 0.121
N2 Nitrogen diatomic rNN 1.098 1.218 0.121
Si2H2 disilyne rSiSi 2.215 2.113 -0.102
Si2H2 disilyne rSiSi 2.215 2.124 -0.092
SiP Silicon monophosphide rSiP 2.078 1.999 -0.078
GaCl3 Gallium trichloride rClGa 2.180 2.117 -0.063
C2H2+ acetylene cation rCC 1.253 1.315 0.062
CaS Calcium sulfide rSCa 2.318 2.375 0.057
HCF Fluoromethylene rCH 1.138 1.084 -0.054
29 molecules.