6p-electron Aromatic Species Containing Heavy Group 14 Elements: Synthesis, Structure and Reactivity of Lithium 1,2,3-Trisilacyclopentadienide

DOI

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Other Title
  • 含高周期14族元素6π電子系芳香族化合物：リチウム 1,2,3-トリシラシクロペンタジエニドの合成、構造及び反応性

Description

Cyclopentadienyl anion is one of the most fundamental 6π-electron aromatic species, however, very few derivatives containing heavier group 14 elements were reported to date. Here, we report the synthesis, structure and reactivity of novel heavy cyclopentadienide.<BR> The heavy analogue of CpLi, lithium 1,2,3-trisilacyclopentadienide, was synthesized by the reduction of 1,2,3-trisilacyclopenta-1,4-diene with KC8 followed by the treatment with excess of dry LiBr. Then, the ligand exchange reaction of the anion from THF to O=CtBu8 resulted in the formation of ketone-coordinated lithium 1,2,3-trisilacyclopentadinide. All NMR signals and the crystal structure indicated the existence of the significant delocalization of π-electrons in five-membered ring. The complexation of lithium 1,2,3-trisilacyclopentadienide with 12-crown-4 or the reaction with [Cp*RuCl]4 gave Li-free cyclic disilenide and heavy ruthenocene analogue, respectively.

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Details 詳細情報について

  • CRID
    1390001205556006784
  • NII Article ID
    130004645477
  • DOI
    10.11494/kisoyuki.2008.0.347.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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