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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Fabrication and Optimization of Type II Silicon Clathrate Films
06:53

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Published on: October 14, 2025

Anionic reagents with silicon-containing double bonds.

David Scheschkewitz1

  • 1Department of Chemistry, Imperial College London, South Kensington Campus, UK. d.scheschkewitz@imperial.ac.uk

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 3, 2009
PubMed
Summary
This summary is machine-generated.

Anionic silicon compounds with double bonds, especially those with silicon-silicon (Si=Si) bonds, are reviewed. These compounds efficiently transfer silicon moieties to various electrophiles, enabling new synthetic pathways in chemistry.

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Area of Science:

  • Organosilicon Chemistry
  • Main Group Chemistry
  • Transition Metal Chemistry

Background:

  • Alkenes and their heavier silicon homologues exhibit distinct chemical properties.
  • Anionic compounds offer unique reactivity for element transfer reactions.

Purpose of the Study:

  • To review anionic compounds capable of transferring silicon-containing double bonds.
  • To highlight the applications of silicon double bond transfer reagents.

Main Methods:

  • Comprehensive literature review of anionic silicon compounds.
  • Analysis of reactivity with main-group, transition-metal, and organic electrophiles.

Main Results:

  • Focus on reagents with silicon-silicon (Si=Si) double bonds, including those with bulky substituents (Tip) and alkali metals (M=Li, Na, K).
  • Demonstrated applications in reactions with diverse electrophiles.
  • Inclusion of recent derivatives with silicon-carbon (Si=C) and silicon-phosphorus (Si=P) bonds.

Conclusions:

  • Anionic silicon compounds are versatile reagents for silicon double bond transfer.
  • These reagents enable the synthesis of novel organosilicon compounds and coordination complexes.