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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 MP3=FULL/daug-cc-pVDZ

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
S4 Sulfur tetramer rSS 2.155 2.922 0.767
CH3CH2SH ethanethiol rCH 1.095 1.846 0.751
ONNO NO dimer rNN 2.236 1.772 -0.464
S4 Sulfur tetramer rSS 2.155 2.600 0.445
CH3CH2SH ethanethiol rCH 1.089 1.532 0.443
CH3CH2SH ethanethiol rCH 1.092 1.532 0.440
CH3CH2SH ethanethiol rCC 1.528 1.846 0.318
CH3CH2SH ethanethiol rCS 1.820 1.532 -0.288
S4 Sulfur tetramer rSS 1.898 2.166 0.268
C2H2+ acetylene cation rCH 1.077 1.326 0.249
N2 Nitrogen diatomic rNN 1.213 1.106 -0.107
N2 Nitrogen diatomic rNN 1.213 1.106 -0.107
C2H2+ acetylene cation rCC 1.253 1.330 0.077
AlBr Aluminum monobromide rAlBr 2.295 2.365 0.070
SiP Silicon monophosphide rSiP 2.078 2.010 -0.068
CH3SSH Hydrogen methyl disulfide rSS 2.038 2.104 0.066
Cl2 Chlorine diatomic rClCl 1.988 2.052 0.064
Br2 Bromine diatomic rBrBr 2.281 2.341 0.060
Cl2+ chlorine diatomic cation rClCl 1.892 1.950 0.059
BrCl Bromine monochloride rClBr 2.136 2.193 0.057
SFCl Sulfur chloride fluoride rSCl 1.994 2.051 0.057
PF2 Phosphorus difluoride rPF 1.579 1.631 0.052
PS phosphorus sulfide rPS 1.900 1.848 -0.052
SiH2F2 difluorosilane rSiF 1.576 1.627 0.051
24 molecules.