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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/Def2TZVPP

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
C4H6 1-Methylcyclopropene rCH 1.085 4.198 3.113
C4H6 1-Methylcyclopropene rCH 1.087 3.413 2.326
C4H6 1-Methylcyclopropene rCC 1.476 2.253 0.777
C4H6 1-Methylcyclopropene rCH 1.087 1.821 0.734
CH3CH2SH ethanethiol rCH 1.095 1.824 0.729
S4 Sulfur tetramer rSS 2.155 2.861 0.706
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 1.715 -0.521
C4H10O Methyl propyl ether rCC 1.530 1.090 -0.440
C4H6 1-Methylcyclopropene rCH 1.070 1.508 0.438
CH3CH2SH ethanethiol rCH 1.089 1.523 0.434
CH3CH2SH ethanethiol rCH 1.092 1.523 0.431
C4H6 1-Methylcyclopropene rCC 1.515 1.085 -0.430
C2H4F2 1,2-difluoroethane rCH 1.093 1.514 0.421
C2H4F2 1,2-difluoroethane rCH 1.093 1.503 0.410
S4 Sulfur tetramer rSS 2.155 2.537 0.382
CH2CHCH2F Allyl Fluoride rHC 1.130 1.495 0.365
C3H3NO Isoxazole rCH 1.075 1.425 0.350
C4H10O Methyl propyl ether rCH 1.099 1.404 0.305
CH3CH2SH ethanethiol rCS 1.820 1.523 -0.297
CH3CH2SH ethanethiol rCC 1.528 1.824 0.296
C2H2+ acetylene cation rCH 1.077 1.310 0.233
S4 Sulfur tetramer rSS 1.898 2.115 0.217
C4H6 1-Methylcyclopropene rCC 1.300 1.511 0.211
S3 Sulfur trimer rSS 1.917 2.083 0.166
KOH Potassium hydroxide rOK 2.212 2.319 0.108
N2O4 Dinitrogen tetroxide rNN 1.782 1.678 -0.104
SiP Silicon monophosphide rSiP 2.078 1.980 -0.098
CrH Chromium hydride rHCr 1.655 1.563 -0.092
CaBr Calcium monobromide rCaBr 2.594 2.672 0.078
KH Potassium hydride rKH 2.243 2.319 0.077
S4 Sulfur tetramer rSS 2.155 2.079 -0.076
HCF Fluoromethylene rCH 1.138 1.082 -0.056
C2H2+ acetylene cation rCC 1.253 1.307 0.054
CaC Calcium monocarbide rCCa 2.302 2.355 0.054
C3H3NO Isoxazole rCC 1.356 1.303 -0.053
CaS Calcium sulfide rSCa 2.318 2.370 0.052
CaBr2 Calcium dibromide rCaBr 2.616 2.667 0.051
39 molecules.