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• W2000640390 startingPage "738" @default.
• W2000640390 abstract "In a recent publication in this journal, an experimental charge density analysis on the triruthenium cluster Ru3(CO)12 showed unusual C...C bond paths linking the axial carbonyl ligands [Gervasio, G.; Marabello, D.; Bianchi, R.; Forni, A. J. Phys. Chem. A2010, 114, 9368, hereafter GMBF]. These were also observed in one theoretical DFT calculation, and are associated with very low values of ρ(rb) and ∇2ρ(rb). Our independent experimental charge density analysis on Ru3(CO)12 is entirely consistent with GMBF and confirms the presence of these apparent weak interactions in the multipole model density. However, we conclusively demonstrate that these unusual C...C bond paths between the axial carbonyl ligands are in fact artifacts arising from the Hansen-Coppens multipole model, which is used to analyze the experimental data. Numerous relativistic and nonrelativistic gas-phase DFT calculations, using very extensive basis sets and with corrections for dispersion effects, uniformly fail to reproduce these intramolecular features in the QTAIM topology of the electron density. Moreover, multipole fitting of theoretical static structure factors computed from these quantum electron densities results in the reappearance of the C...C bond paths between the axial carbonyl ligands in the derived molecular graphs. On the other hand, using the experimental structure factors to generate “experimental” X-ray constrained DFT wave functions once again yields molecular graphs which do not show these secondary C...C bond paths. The evidence therefore strongly implicates the multipole model as the source of these spurious features and in turn suggests that great caution should be applied in the interpretation of bond paths where the values of ρ(rb) and ∇2ρ(rb) are very low." @default.
• W2000640390 created "2016-06-24" @default.
• W2000640390 creator A5068649564 @default.
• W2000640390 creator A5083617813 @default.
• W2000640390 date "2011-12-16" @default.
• W2000640390 modified "2023-10-16" @default.
• W2000640390 title "On the Unusual Weak Intramolecular C...C Interactions in Ru₃(CO)₁₂: A Case of Bond Path Artifacts Introduced by the Multipole Model?" @default.
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