Chapter 47. Syntheses and Properties of Novel Cage-Shaped Molecules Containing an Extended Silicon Backbone

  1. Prof. Dr. Norbert Auner3 and
  2. Prof. Dr. Johann Weis4
  1. Roland Fischer1,
  2. Judith Baumgartner1,
  3. Karl Hassler1 and
  4. Guido Kickelbick2

Published Online: 5 MAY 2008

DOI: 10.1002/9783527619924.ch47

Organosilicon Chemistry V: From Molecules to Materials

Organosilicon Chemistry V: From Molecules to Materials

How to Cite

Fischer, R., Baumgartner, J., Hassler, K. and Kickelbick, G. (2003) Syntheses and Properties of Novel Cage-Shaped Molecules Containing an Extended Silicon Backbone, in Organosilicon Chemistry V: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619924.ch47

Editor Information

  1. 3

    Department of Inorganic Chemistry, University of Frankfurt, Marie-Curie-Straße 11, 60439 Frankfurt am Main, Germany

  2. 4

    Consortium of Electrochemical Industry GmbH, Zielstattstraße 20, 81379 Munich, Germany

Author Information

  1. 1

    Institut für Anorganische Chemie, Technische Universität Graz Stremayrgasse 16, 8010 Graz, Austria Tel: +43 316 873 8209 — Fax: +43 316 873 8701

  2. 2

    Institut für Materialchemie, Technische Universität Wien Getreidemark 9, 1060 Wien, Austria Tel: +43 1 58801 15321 —Fax: +43 1 58801 15399

Publication History

  1. Published Online: 5 MAY 2008
  2. Published Print: 26 SEP 2003

ISBN Information

Print ISBN: 9783527306701

Online ISBN: 9783527619924

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Keywords:

  • silicon;
  • cages;
  • NMR spectroscopy;
  • X-ray structures;
  • NMR shift calculations

Summary

When branched hexabromoheptasilanes are reacted with divalent nucleophiles such as H2O, H2S, NH3 or MeNH2, cage structures analogous to that of adamantane are obtained in almost quantitative yields. The reduction of hexabromoheptasilanes with bulkier terminal tert-butyl groups affords heptasilanortricyclenes, which have a molecular geometry often met in group 15 chemistry. The structures of these compounds were determined by NMR spectroscopy and X-ray crystallography. Structural features were further investigated by means of ab-initio calculations.