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2010 Fiscal Year Annual Research Report

高周期14族元素環状ポリイン配位子をもつ遷移金属錯体に関する研究

Research Project

Project/Area Number 21550033
Research InstitutionUniversity of Tsukuba

Principal Investigator

LEE VladImIr  筑波大学, 大学院・数理物質科学研究科, 講師 (90375410)

KeywordsMain Group Elements / 不飽和環状化合物 / 環状ポリエン / Cyclic π-ligand / cyclobutadiene / tetragermacyclobutadiene / Aromaticity / dianion
Research Abstract

高周期14族元素からなる不飽和化合物の化学は、現代有機金属化学の基盤研究として発展してきた。炭素π電子系の高周期元素類縁体も知られるようになり、その基本的性質も明らかになりつつある。そこで高周期元素からなる環状π配位子もつ有機金属錯体を合成し、その構造や性質の解明を研究目的とした。本研究では、ケイ素、ゲルマニウム、スズ等の高周期14族元素からなるシクロブタジエンジアニオンやシクロペンタジエニドを系統的に合成し、その構造や電子状態を精密に比較検討した。平成22年度の研究成果では、新たにテトラゲルマシクロブタジエンジアニオンを利用した遷移金属錯体の合成と構造解析に成功した。これは現在知られている6π電子シクロブタジエン配位子の中では最も「重い」高周期元素からなる化合物である。X線構造解析により分子構造を明らかにし、すでに合成に成功している同族の炭素類縁体およびケイ素類縁体との比較を行った。その結果、フロンティア軌道の性質を反映して高周期元素になるほどHOMOが上昇し、LUMOが下がることが実験的に明らかとなった。また、芳香族性の有無に関して分子軌道法を用いた理論計算により検証し、ケイ素シクロブタジエンジアニオンと類似した性質を有することを明らかにした。高周期元素シクロブタジエンジアニオンは高周期元素π電子系化合物の新たな機能性を開拓するとともに、新たな環状π配位子としての応用も期待される。

  • Research Products

    (17 results)

All 2010 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (11 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Heteronuclear Double Bonds E=E' (E=Heavy Group 14 Element, E'=Group 13-16 Element)2010

    • Author(s)
      Lee Vladimir
    • Journal Title

      Chemistry Letters

      Volume: 39 Pages: 312-318

    • Peer Reviewed
  • [Journal Article] The Hexasiladigermacubane Dianion2010

    • Author(s)
      Lee Vladimir
    • Journal Title

      Applied Organometallic Chemistry

      Volume: 24 Pages: 834-836

    • Peer Reviewed
  • [Journal Article] A Two-and-a-half-layer Sandwich : Potassium Salt of Anionic (η^4-Tetrasilacyclobutadiene)(η^5-cyclopentadienyl)ruthenium. A Special Issue of New Horizon of Organosilicon Chemistry2010

    • Author(s)
      Lee Vladimir
    • Journal Title

      Dalton Transactions

      Volume: 39 Pages: 9229-9231

    • Peer Reviewed
  • [Journal Article] Electronic Structure of Bis(Silyl) Carbon-, Silicon-, and Germanium-Centered Radicals (R_3Si)_2XE・(X=H, Re(CO)_5, F ; E=C, Si, Ge) : EPR and DFT Studies2010

    • Author(s)
      D.Sheberla
    • Journal Title

      Organometallics

      Volume: 29 Pages: 5596-5606

    • Peer Reviewed
  • [Presentation] Synthesis, Structure and Properties of η^4-Tetragermacyclobutadiene Transition Meta1 Complexes, and Their Precursors2010

    • Author(s)
      Y.Ito
    • Organizer
      37^<th> Symposium on Main Group Element Chemistry
    • Place of Presentation
      室蘭市民会館
    • Year and Date
      20101125-20101127
  • [Presentation] Novel Reactivity of a Highly Twisted Digermene, (^tBu_2MeSi)_2Ge=Ge(SiMe^tBu_2)_22010

    • Author(s)
      K.McNeice
    • Organizer
      14^<th> Symposium of the Society of Silicon Chemistry Japan
    • Place of Presentation
      ニューウェルシティ湯河原
    • Year and Date
      20101119-20101120
  • [Presentation] Novel Transition Metal Complex Featuring Tetragermacyclobutadiene Ligand from Tetragermacyclobutadiene Dianion : Synthesis and Structure2010

    • Author(s)
      Y.Ito
    • Organizer
      14^<th> Symposium of the Society of Silicon Chemistry Japan
    • Place of Presentation
      ニューウェルシティ湯河原
    • Year and Date
      20101119-20101120
  • [Presentation] Specific Reactivity of the Novel Digermene2010

    • Author(s)
      K.McNeicei
    • Organizer
      4^<th> Kanto Branch Conference of the Chemical Society of Japan
    • Place of Presentation
      筑波大学筑波キャンパス
    • Year and Date
      20100830-20100831
  • [Presentation] Synthesis and Structure of the Novel Doubly-Bonded Compounds of the Heavy Group 14-15 Elements2010

    • Author(s)
      S.Aokir
    • Organizer
      4^<th> Kanto Branch Conference of the Chemical Society of Japan
    • Place of Presentation
      筑波大学筑波キャンパス
    • Year and Date
      20100830-20100831
  • [Presentation] Synthesis, Structure and Properties of the Novel Transition Metal Complexes Featuring Tetragermacyclobutadiene Ligand2010

    • Author(s)
      Y.Ito
    • Organizer
      4^<th> Kanto Branch Confcrence of the Chemical Society of Japan
    • Place of Presentation
      筑波大学筑波キャンパス
    • Year and Date
      20100830-20100831
  • [Presentation] From Schrock Silylene/Germylene Transition Metal complexes to (Sila/Germa) metallacyclobutenes, "Frozen" Intermediates of the Silicon/Germanium Variations of Metathesis Reactions2010

    • Author(s)
      Lee Vladimir
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tin and Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      20100711-20100715
  • [Presentation] From Tetragermacyclobutadiene Dianion to Transition Metal Complexes Featuring Tetragermacyclobutadiene Ligand2010

    • Author(s)
      Lee Vladimir
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tina nd Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      20100711-20100715
  • [Presentation] Isomeric Metamorphoses : Valence Interplay Between the Cyclopropene, Bicyclo[1.1.0]butane and Cyclobutene Analogues of the Heavy Group 14 Elements2010

    • Author(s)
      Lee Vladimir
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tin and Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      20100711-20100715
  • [Presentation] Push-Pull Phosphagermene (R_3Si)_2Ge=PMes^* and Arsagermene (R_3Si)_2Ge=AsMes^*(R_3Si=SiMe^tBu_2, Mes^*=C_6H_2-2,4,6-^tBu)2010

    • Author(s)
      Lee Vladimir
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tin and Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      20100711-20100715
  • [Presentation] Distannene (^tBu_2MeSi)_2Sn=Sn(SiMe^tBu_2)_2, Which Does Not Dissociate in Solution into Stannylenes, and Its Anion-Radical2010

    • Author(s)
      Lee Vladimir
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tin and Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      20100711-20100715
  • [Book] Organometallic Compounds of Low-Coordinate Si, Ge, Sn and Pb : From Phantom Species to Stable Compounds2010

    • Author(s)
      Lee Vladimir・A.Sekiguchi
    • Total Pages
      431
    • Publisher
      John Wiley and Sons, Ltd.
  • [Remarks]

    • URL

      http://nao.chem.tsukuba.ac.jp/sekiguch/index.html

URL: 

Published: 2012-07-19  

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