14族元素メタロールアニオンおよびジアニオンの合成, 構造および反応

概要

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The synthesis, structures and physical and chemical properties of mono- and dianions of group 14 metalloles (1-metallacyclopentadiene), heavier congeners of the cyclopentadienyl anion, are described. The silole anion shows aromaticity with different extent by its substituent, while the germole anion does not show aromaticity. On the contrary, dianions of metalloles have a great extent of aromatic character owing to strong participation of divalent resonance forms. Theoretical calculation suggests that the coordination of lithium to the metallole dianions should promote their aromaticity. The synthesis and characterization of η<SUP>5</SUP>-silolyl and η<SUP>5</SUP>-germolyl metal complexes, analogs of ferrocene, are also described.
社団法人有機合成化学協会の論文
2004-08-01