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ケイ素多重結合を活用した炭素π電子系化合物の構築

Research Project

Project/Area Number 19020012
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

関口 章  University of Tsukuba, 大学院・数理物質科学研究科, 教授 (90143164)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 2008: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2007: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsケイ素-ケイ素二重結合 / ケイ素多重結合 / ケイ素-炭素結合形成反応 / 環化付加 / シクロトリシレン / シクロペンタジエニド / シクロブタジェン
Research Abstract

本研究では、高周期不飽和三員環化合物と末端または内部アセチレンとの反応による環状化合物の生成機構の解明を行い、ケイ素多重結合化合物を活用した新規炭素π電子系の構築法を検討した。
1. 骨格の飽和原子上に^tBu_2MeSiCH_2基を導入したシクロトリシレン及びシクロトリゲルメンを新規に合成した。これらの不飽和三員環ケイ素化合物や不飽和三員環ゲルマニウム化合物は内部アセチレンである3-ヘキシンまたは4-オクチンと無触媒下で反応し、^tBu_2MeSiCH_2基の転位を伴ったトリシラシクロペンタジエン及びトリゲルマシクロペンタジエンが生成することを見出した。これらの化合物はシクロペンタジエンの骨格炭素原子3個を高周期元素に置き換えた新しいタイプのπ電子系高周期シクロペンタジエンである。
2. 合成したトリシラシクロペンタジエンに対し、2当量のKC_8を用いた還元反応後、LiBrによる対カチオン交換反応を行う事で、骨格にケイ素原子を3つ有するケイ素-炭素混合型6π電子系芳香族化合物リチウムトリシラシクロペンタジエニドを暗赤色の結晶として合成する事に成功した。NMRスペクトル及びX線結晶構造解析による分子構造から、リチウムトリシラシクロペンタジエニドは溶液中及び結晶状態ともに五員環部においてπ電子が非局在化した6π電子系芳香族化合物であり、Liイオンは五員環アニオン部に対してη^5型で配位していることを明らかにした。この溶液に2当量の12-crown-4エーテルを作用させると、置換基の転位を伴い、リチウムフリーな初めての環状ジシレニドが生成することを見出した。

Report

(2 results)
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (37 results)

All 2009 2008 2007 Other

All Journal Article (17 results) (of which Peer Reviewed: 17 results) Presentation (18 results) Remarks (2 results)

  • [Journal Article] Spiro [2, 5-dibenzo-1, 4-disilacyclohexa-2, 5-diene-1, 7'-2', 5'-dibenzo- 1', 4', 7-trisil anorbornadiene] : Unusual Dimerization of Silyl-substituted 9,10-Disila (Dewar Anthracene)2009

    • Author(s)
      N. Nkata
    • Journal Title

      Phosphorus, Sulfur, Silicon Relat. Elem. (印刷中)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Isomeric Metamorphosis : Si_3E (E=S, Se, and Te) Bicyclo[1. 1. 0]butane and Cyclobutene2008

    • Author(s)
      V. Ya. Lee
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 2758-2759

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Isolable Cation-radical of Disilene : Synthesis, Characterization, and a Reversible One-electron Redox System2008

    • Author(s)
      S. Inoue
    • Journal Title

      European Journal of Inorganic Chemistry 130

      Pages: 6078-6079

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 1,2-Disilacyclobut-2-enes : Donor-Free Four-Membered Cyclic Silenes from Reaction of Disilenides with Vinylbromides2008

    • Author(s)
      I. Bejan
    • Journal Title

      Chemistry : A European Journal 14

      Pages: 7119-7122

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An Isolable Boryl-substituted Disilene from the Reaction of an sp^2-type Silyl Anion with Haloboranes : Synthesis and Characterization2008

    • Author(s)
      S. Inoue
    • Journal Title

      Chemistry Letters 37

      Pages: 1044-1045

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Stable Silagermene (^tBu_3Si)_2Si=Ge(Mes)_2 (Mes = 2, 4, 6-trimethylphenyl) : Synthesis, X-ray Crystal Structure, and Thermal Isomerization2008

    • Author(s)
      M. Igarashi
    • Journal Title

      Heteroatom Chemistry 37

      Pages: 649-653

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 1, 3-Digerma-2-gallata-and-indataallenic Anions : The First Compounds with Ge=Ga or Ge=ln Double Bonds2008

    • Author(s)
      N. Nakata
    • Journal Title

      Chemistry Letters 37

      Pages: 1146-1147

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reactivity of the Disilyne (R=SiPr[CH(SiMe_3)_2]_2) toward Silylcyanide : Two Pathways to form the Bis-Adduct [RSiSiR(CNSiMe_3)_2] with Silaketenimine Character and a 1, 4-Diaza-2,3-disilabenzene Analoeue2008

    • Author(s)
      K. Takeuchi
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 16848-16849

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photochemical Reaction of Sily-substituted 1,4-Disila(Dewar-benzene)with Isocyanide and Phenylacetylene2008

    • Author(s)
      T.Oikawa
    • Journal Title

      Heteroatom Chemistry 19

      Pages: 87-92

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Making Stable Radicals of Heavy Elements of Groups 14and 13:The Might of Silyl Substitution (Highlight Review)2008

    • Author(s)
      V.Ya.Lee
    • Journal Title

      Chemistry Letters 37

      Pages: 128-133

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heavy Cyclopropene Analogues R_4SiGe_2 and R_4Ge_3 (R=SiMe^1Bu_2)-New Members of the Cyclic Digermenes Family2007

    • Author(s)
      V.Ya.Lee
    • Journal Title

      Journal of Organometallic Chemistry 692

      Pages: 10-19

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interpaly fo EnE'_<3-n>C Valence Isomers (E,E'=Si,Ge):Bicyclo-[1.1.0]butanes with Very Short Bridging Bonds and Their Isomeriza-tion to Alkyl-substituted Cyclopropenes2007

    • Author(s)
      V.Ya.Lee
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 2436-2437

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thia-and Selenasilaboriranes and 1,2,3,4-Dioxasilaboretane from a Stable Silaborene2007

    • Author(s)
      N.Nakata
    • Journal Title

      Chemistry Letters 36

      Pages: 662-663

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Isolable Silylene Anion Radical:Structural Characteristics in the Sold State and in Solution2007

    • Author(s)
      S.Inoue
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 6696-6697

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two-Coordinate Group 13 Element (Al,Ga) Centered Cations Formed by Silyl Group Migration: Synthesis and Characterization2007

    • Author(s)
      M.Nakamoto
    • Journal Title

      Chemistry Letters 36

      Pages: 984-985

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 1,2,5,6-Tetrasilabenzobenzvalene:A Valence Isomer of 1,2,3,4-Tetra-silanaphthalene2007

    • Author(s)
      K.Takanashi
    • Journal Title

      Chemistry Letters 36

      Pages: 1158-1159

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stable Silyl,Germyl,and Stannyl Cations, Radicals and Anions:Heavy Versions of Carbocations, Carbon Radicals, and Carbanions2007

    • Author(s)
      V.Ya.Lee
    • Journal Title

      Accounts of Chemical Research 40

      Pages: 410-419

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 新しいπ電子系化合物 : 三重結合ケイ素化合物ジシリンの化学2009

    • Author(s)
      関口章
    • Organizer
      筑波大学ズレ戦略イニシアティブ「機能分子創成研究拠点」
    • Place of Presentation
      つくば国際会議場
    • Related Report
      2008 Annual Research Report
  • [Presentation] Disilyne with a Silicon-Silicon Triple Bond : A New Entry to Multiple Bond Chemistry2008

    • Author(s)
      A. Sekiguchi
    • Organizer
      The 15th International Symposium on Organosilicon Chemistry (ISOSXV)
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2008 Annual Research Report
  • [Presentation] Isomeric Metamorphoses : Si_3E (E = C, S, Se, Te) Bicyclo[1. 1. 0Thutane, Cyclobutene, Cyclopropene2008

    • Author(s)
      V. Ya. Lee
    • Organizer
      The 15th International Symposium on Organosilicon Chemistry (ISOSXV)
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2008 Annual Research Report
  • [Presentation] Synthesis, Structure, and Reactivity of Disilenyl Anion2008

    • Author(s)
      M. Ichinohe
    • Organizer
      The 15th International Symposium on Organosilicon Chemistry (ISOSXV)
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2008 Annual Research Report
  • [Presentation] Synthesis and Structure of Lithium Trisilacyclopentadiene2008

    • Author(s)
      H. Yasuda
    • Organizer
      The 15th International Symposium on Organosilicon Chemistry (ISOSXV)
    • Place of Presentation
      Jeju, Korea
    • Related Report
      2008 Annual Research Report
  • [Presentation] Synthesis and Structure of the Disilyne Bearing New Bulky-substituent2008

    • Author(s)
      Y. Murata
    • Organizer
      Post ISOS XV Symposium
    • Place of Presentation
      Takasaki, Gunma
    • Related Report
      2008 Annual Research Report
  • [Presentation] 含高周期14族元素6π電字系芳香族化合物 : 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2008

    • Author(s)
      安田浩之
    • Organizer
      第19回基礎有機化学連合討論会
    • Place of Presentation
      大阪大学吹田キャンパス
    • Related Report
      2008 Annual Research Report
  • [Presentation] 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2007

    • Author(s)
      安田浩之
    • Organizer
      筑波大学プレ戦略イニシアティブ「機能分子創成研究拠点」
    • Place of Presentation
      つくば国際会議場
    • Related Report
      2008 Annual Research Report
  • [Presentation] 1,1-Dimethy1-2,5-diphenylsilole Dianion Dilithium2007

    • Author(s)
      T., Matsuo
    • Organizer
      12th International Symposium on Novel Aromatic Compounds
    • Place of Presentation
      Awaji Island, Hyogo, Japan
    • Related Report
      2007 Annual Research Report
  • [Presentation] Bicyclo[1.1.0]butanes Containing Heavier Group 14 Elements: Synthesis, Structure and Reactivity2007

    • Author(s)
      H., Yasuda
    • Organizer
      14th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis
    • Place of Presentation
      Nara, Japan
    • Related Report
      2007 Annual Research Report
  • [Presentation] Disilyne with a Silicon-silicon Triple Bond: A New Entry to Multiple Bond Chemistry2007

    • Author(s)
      A., Sekiguchi
    • Organizer
      International Conference on Heteroatom Chemistry
    • Place of Presentation
      Riverside, California, USA
    • Related Report
      2007 Annual Research Report
  • [Presentation] Multiple Bonede Silicon Chemistry: From Double Bond to Triple Bond2007

    • Author(s)
      A., Sekiguchi
    • Organizer
      4th European Silicon Days
    • Place of Presentation
      Bath, UK
    • Related Report
      2007 Annual Research Report
  • [Presentation] 含高周期14族元素ビシクロ[1.1.0]ブタンの合成、構造及び特異な反応性2007

    • Author(s)
      安田浩之
    • Organizer
      第54回有機金属化学討論会
    • Place of Presentation
      広島大学、東広島市
    • Related Report
      2007 Annual Research Report
  • [Presentation] 14,16族元素からなる高周期ビシクロ[1.1.0]ブタン類縁体の合成、構造および異性化反応2007

    • Author(s)
      宮崎彰吾
    • Organizer
      第54回有機金属化学討論会
    • Place of Presentation
      広島大学、東広島市
    • Related Report
      2007 Annual Research Report
  • [Presentation] Synthesis, Structure and Isomerization of the Hezvy Bicyclo[1.1.0]butane Derivatives Composed of the Group 14-16 Elements2007

    • Author(s)
      S., Miyazaki
    • Organizer
      第1回アジアケイ素化学会議(ASiS-1)
    • Place of Presentation
      Hotel Zao-Heights, Zao Town, Miyagi
    • Related Report
      2007 Annual Research Report
  • [Presentation] Reactivity of Disilyne with a Silicon-silicon Triple Bond: Thermal Isomerization and Reactions with Nitriles and Isonitriles2007

    • Author(s)
      K., Takeuchi
    • Organizer
      第1回アジアケイ素化学会議(ASiS-1)
    • Place of Presentation
      Hotel Zao-Heights, Zao Town, Miyagi
    • Related Report
      2007 Annual Research Report
  • [Presentation] ケイ素-ケイ素三重結合化合物ジシリンと有機小分子との反応2007

    • Author(s)
      砂子麻由美
    • Organizer
      第34回有機典型元素化学討論会
    • Place of Presentation
      大阪 大阪大学吹田キャンパス
    • Related Report
      2007 Annual Research Report
  • [Presentation] ケイ素-ケイ素三重結合化合物ジシリンの熱異性化反応、及び窒素田重結合化合物との反応性2007

    • Author(s)
      竹内勝彦
    • Organizer
      第34回有機典型元素化学討論会
    • Place of Presentation
      大阪 大阪大学吹田キャンパス
    • Related Report
      2007 Annual Research Report
  • [Remarks]

    • URL

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

    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

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

    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2018-03-28  

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