The Cu7Sc cluster is a stable σ-aromatic seven-membered ring

Tibor Höltzl, Ewald Janssens, Nele Veldeman, T. Veszprémi, Peter Lievens, Minh Tho Nguyen

Research output: Contribution to journalArticle

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Abstract

Density functional theory calculations demonstrate that the global minimum of the Cu7Sc potential energy surface is a seven-membered ring of copper atoms with scandium in its center, yielding a planar D7h, structure. Nucleus-independent chemical shifts [NICS(1)zz and NICS(2)zz] show that this cluster has aromatic character, which is consistent with the number of 4s electrons of copper and scandium plus the 3d electrons of scandium satisfying Hückel's rule. According to a canonical MO decomposition of NICS(1)zz and NICS(2)zz, the MOs consisting of the 4s atomic orbi tals are mainly responsible for the aromatic behavior of the cluster. The electron localizability indicator (ELI-D) and its canonical MO decomposition (partial ELI-D) suggest that a localized basin is formed in Cu7Sc by the copper atoms whereas the two circular localized domains are situated below and above the ring. The planar Cu 7Sc cluster can thus be considered as a σ-aromatic species. These findings agree with the phenomenological shell model.

Original languageEnglish
Pages (from-to)833-838
Number of pages6
JournalChemPhysChem
Volume9
Issue number6
DOIs
Publication statusPublished - Apr 21 2008

Fingerprint

Scandium
scandium
Copper
Electrons
rings
copper
electrons
Decomposition
decomposition
Atoms
Potential energy surfaces
planar structures
Chemical shift
Density functional theory
chemical equilibrium
atoms
potential energy
density functional theory
nuclei

Keywords

  • Aromaticity
  • Cluster compounds
  • Electron localizability indicator
  • Electronic structure
  • Seven-membered ring

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Höltzl, T., Janssens, E., Veldeman, N., Veszprémi, T., Lievens, P., & Nguyen, M. T. (2008). The Cu7Sc cluster is a stable σ-aromatic seven-membered ring. ChemPhysChem, 9(6), 833-838. https://doi.org/10.1002/cphc.200700752

The Cu7Sc cluster is a stable σ-aromatic seven-membered ring. / Höltzl, Tibor; Janssens, Ewald; Veldeman, Nele; Veszprémi, T.; Lievens, Peter; Nguyen, Minh Tho.

In: ChemPhysChem, Vol. 9, No. 6, 21.04.2008, p. 833-838.

Research output: Contribution to journalArticle

Höltzl, T, Janssens, E, Veldeman, N, Veszprémi, T, Lievens, P & Nguyen, MT 2008, 'The Cu7Sc cluster is a stable σ-aromatic seven-membered ring', ChemPhysChem, vol. 9, no. 6, pp. 833-838. https://doi.org/10.1002/cphc.200700752
Höltzl T, Janssens E, Veldeman N, Veszprémi T, Lievens P, Nguyen MT. The Cu7Sc cluster is a stable σ-aromatic seven-membered ring. ChemPhysChem. 2008 Apr 21;9(6):833-838. https://doi.org/10.1002/cphc.200700752
Höltzl, Tibor ; Janssens, Ewald ; Veldeman, Nele ; Veszprémi, T. ; Lievens, Peter ; Nguyen, Minh Tho. / The Cu7Sc cluster is a stable σ-aromatic seven-membered ring. In: ChemPhysChem. 2008 ; Vol. 9, No. 6. pp. 833-838.
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