Jump to main content
Jump to site search


Low oxidation state silicon clusters – synthesis and structure of [NHCDippCu(η4-Si9)]3−

Author affiliations

Abstract

The reaction of NHCDippCuCl with the silicide phases A12Si17 (A: K, K/Rb, Rb) in NH3(l) yields [NHCDippCu(η4-Si9)]3− (1) as only the third example of a substituted [Si9] cluster. The corresponding salts A3[A(2.2.2-crypt)]3[NHCDippCu(η4-Si9)]2·26NH3 (A: K (1a), K/Rb (1b), Rb (1c)) crystallize isostructurally in the space group P[1 with combining macron] and have been characterized by single crystal structure determination. ESI-MS and NMR experiments reveal that the anion [NHCDippCu(η4-Si9)]3− can also be transferred to pyridine or acetonitrile solutions at low temperature. However, at room temperature dissociation under the release of the NHC ligand occurs. Variation of the NHC ligand in the [Cu–NHC]+-substituted silicide clusters is possible, whereas the reactions of K12Si17 with the corresponding NHCDippMCl (M: Ag, Au) complexes result in a partial oxidation of the silicide clusters, without attachment of [M–NHC]+, yielding [Si9]3− species.

Graphical abstract: Low oxidation state silicon clusters – synthesis and structure of [NHCDippCu(η4-Si9)]3−

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Oct 2017, accepted on 11 Nov 2017 and first published on 13 Nov 2017


Article type: Communication
DOI: 10.1039/C7CC07995H
Citation: Chem. Commun., 2017, Advance Article
  •   Request permissions

    Low oxidation state silicon clusters – synthesis and structure of [NHCDippCu(η4-Si9)]3−

    F. S. Geitner and T. F. Fässler, Chem. Commun., 2017, Advance Article , DOI: 10.1039/C7CC07995H

Search articles by author

Spotlight

Advertisements