Joseph, Stefanie and Suchentrunk, Christof and Kraus, Florian and Korber, Nikolaus (2009) Si-9(4-) Anions in Solution - Structures of the Solvates Rb4Si9 center dot 4.75NH(3) and [Rb(18-crown-6)]Rb3Si9 center dot 4NH(3), and Chemical Bonding in Si-9(4-). EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (31). pp. 4641-4647. ISSN 1434-1948, 1099-0682
Full text not available from this repository. (Request a copy)Abstract
Dissolving the ternary material K6Rb6Si17 together with chelating ligands such as 18-crown-6 (1,4,7,10,13,16-hexaoxa-cyclooctadecane), dibenzo-18-crown-6 (2,3,11,12-dibenzo-1,4,7,10,13,16-hexaoxacyclooctadecane) and [2.2.2]cryptand (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) in liquid ammonia yields the solvates Rb4Si9 center dot 4.75NH(3) and [Rb(18-crown-6)]Rb3Si9 center dot 4NH(3). Single-crystal X-ray diffraction analysis reveals the presence of Si-9(4-) anions, the existence of which in solution has been a matter of discussion until now. In both compounds, the Si-9(4-) cages display slightly distorted monocapped square-antiprismatic shapes. Additionally, quantum chemical calculations, NBO analysis and ELF (electron localisation function) considerations have been made to gain a deeper insight into the chemical bonding of this Zintl anion. The ELF analysis shows that, whereas the Wade-Mingos-Williams rules obviously apply for the prediction of the molecular shape of the anions, no evidence for three-centre two-electron bonding can be found. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRON LOCALIZATION FUNCTION; CRYSTAL-STRUCTURES; HOMOPOLYATOMIC ANIONS; TOPOLOGICAL ANALYSIS; SILICON CLUSTERS; ZINTL ANIONS; SOLID-STATE; IONS; ANNOUNCEMENT; AMMONIATE; Zintl anions; Silicon; Cluster compounds; Ab initio calculations; ELF (Electron Localisation Function) |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Nikolaus Korber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Sep 2020 08:37 |
| Last Modified: | 02 Sep 2020 08:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28182 |
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