Chapter 54. Polysilyl Dianions — Synthesis and Reactivity

  1. Prof. Norbert Auner2 and
  2. Prof. Johann Weis3
  1. Christian Mechtler and
  2. Christoph Marschner

Published Online: 28 APR 2008

DOI: 10.1002/9783527619917.ch54

Organosilicon Chemistry IV: From Molecules to Materials

Organosilicon Chemistry IV: From Molecules to Materials

How to Cite

Mechtler, C. and Marschner, C. (2000) Polysilyl Dianions — Synthesis and Reactivity, in Organosilicon Chemistry IV: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619917.ch54

Editor Information

  1. 2

    Inst. für Anorganische Chemie, der Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, Phone: 0 69/7 98-29180, -29591, Fax: 069/798-29188

  2. 3

    Wacker-Chemie GmbH, Geschäftsbereich S, Werk Burghausen, Johannes-Hess-Strasse 24, D-84489 Burghausen, Germany

Author Information

  1. Institut für Anorganische Chemie, Technische Universität Graz Stremayrgasse 16, A-8010 Graz, Austria Tel.: Int. code + (316)873 8209 —Fax: Int. code + (316)873 8701

Publication History

  1. Published Online: 28 APR 2008
  2. Published Print: 17 JAN 2000

ISBN Information

Print ISBN: 9783527298549

Online ISBN: 9783527619917



  • polysilanes;
  • silyl anions;
  • cyclization;
  • potassium


The synthesis of α, ω-bis[tris(trimethylsilyl)silyl] alkanes was achieved by the reaction of α, ω-ditosylalkanes with tris(trimethylsilyl)silyl potassium. Reaction of these with one equivalent of potassium tert-butoxide resulted in clean formation of monopotassium silyl anions. Addition of another equivalent of the transmetallating agent led to the formation of the dipotassium compounds in cases where the alkyl spacer contained at least three methylene units. Partial hydrolysis of the dipotassium compounds induced an intramolecular reaction yielding a cyclic silyl potassium compound.