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2007 Fiscal Year Annual Research Report

低配位及び多重結合高周期典型元素化合物の創製と物性に関する系統的研究

Research Project

Project/Area Number 19105001
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)

Co-Investigator(Kenkyū-buntansha) 一戸 雅聡  筑波大学, 大学院・数理物質科学研究科, 准教授 (90271858)
LEE Vladimir  筑波大学, 大学院・数理物質科学研究科, 講師 (90375410)
中本 真晃  筑波大学, 大学院・数理物質科学研究科, 講師 (90334044)
Keywords高周期典型元素 / ケイ素 / ジシレン / ジシリン / シリルラジカル / 芳香族化合物
Research Abstract

ケイ素二重結合化合物に関する研究:シリル金属種(シリルアニオン種)は有機ケイ素化合物の構築において重要な活性種であり、これまでに種々のsp3シリルアニオン種(R_3Si-M型化合物)の合成法、構造、反応性が明らかにされてきたが、ビニル金属種やアリール金属種のケイ素類縁体(sp3シリルアニオン種)は、ほとんど報告例の無い未知化合物であった。本研究では、トリアルキルシリル基で完全に置換されたケイ素=ケイ素二重結合化合物(テトラシリルジシレン)を鍵化合物として、アルカリ金属置換ジシレンの合成・構造解析に成功した。また、各種求電子剤との反応ではケイ素=ケイ素二重結合を保持したまま対応する置換ジシレンに誘導できることを明らかにした。
ケイ素芳香族化合物に関する研究:4員環6π電子系化合物であるシクロブタジエンジアニオンのケイ素類縁体テトラシラシクロブタジエンジアニオンをジアルカリ金属塩として合成することに成功し、その分子構造をX線結晶構造解析で決定した。その結果、折れ曲がったケイ素4員環骨格を持ち、非芳香族性であることを明らかにした。また、シクロブタジエンジアニオンを出発物質として、テトラシラシクロブタジエン-遷移金属錯体の合成に成功した。
常磁性ケイ素化合物に関する研究:ケイ素-ケイ素三重結合化合物ジシリン、ケイ素-ケイ素二重結合化合物ジシレンの1電子還元により対応するアニオンラジカル種を合成することに成功した。X線結晶構造解析、各種分光法によりジシリンアニオンラジカルでは、負電荷、スピン共に二つのspケイ素上に非局在化しているのに対し、ジシレンアニオンラジカルでは一方のsp2ケイ素に負電荷が、もう一方のsp2ケイ素にスピンが局在化した非対称な構造を持つことを明らかにした。

  • Research Products

    (49 results)

All 2008 2007 Other

All Journal Article (20 results) (of which Peer Reviewed: 20 results) Presentation (27 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Disilyne with a Silicon-Silicon Triple Bond: A Eew Entry to Multiple Bond Chemistry2008

    • Author(s)
      A. Sekiguchi
    • Journal Title

      Pure and Applied Chemistry 80

      Pages: 449-459

    • Peer Reviewed
  • [Journal Article] Photochemical Reaction of Silyl-substituted 1,4-Disila(Dewar-benzene)with Isocyanide and Phenylacetylene2008

    • Author(s)
      T. Oikawa
    • Journal Title

      Heteroatom Chemistry 19

      Pages: 87-92

    • Peer Reviewed
  • [Journal Article] Tri-tert-butylsilylsilylenes with Alkali Metal Substituents(tBu_3Si)SiM(M=Li, K): Electronically and Sterically Accessible Triplet Ground States2008

    • Author(s)
      A. Sekiguchi
    • Journal Title

      Journal of the American Chemical Society 130

      Pages: 426-427

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

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

      Chemistry Letters 37

      Pages: 128-133

    • Peer Reviewed
  • [Journal Article] Heavy Cyclopropene Analogues R_4SiGe_2 and R_4Ge_3(R=SiMetBu_2)-New Members of the Cyclic Digermenes Family2007

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

      Journal of Organometallic Chemistry 692

      Pages: 10-19

    • Peer Reviewed
  • [Journal Article] An Isolable Disilyne Anion Radical and a New Route to the Disilenide Ion upon Reduction of a Disilyne2007

    • Author(s)
      R. Kinjo
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 26-27

    • Peer Reviewed
  • [Journal Article] Interplay of 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

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

    • Author(s)
      N. Nakata
    • Journal Title

      Chemistry Letters 36

      Pages: 662-663

    • Peer Reviewed
  • [Journal Article] Heavy Analogues of the 6π-Electron Anionic Ring Systems: Cyclo-pentadienide Ion and Cyclobutadiene Dianion2007

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

      Journal of Organometallic Chemistry 692

      Pages: 2800-2810

    • Peer Reviewed
  • [Journal Article] Conversion of a Disilenide into a Silene: Silyl-Anion-Substituted Silene by Sila-Peterson-Type Reaction from an sp^2-Type Silyl Anion2007

    • Author(s)
      S. Inoue
    • Journal Title

      Angewandte Chemie, International Edition 46

      Pages: 3346-3348

    • Peer Reviewed
  • [Journal Article] Stable Cyclic Silenes from Reaction of Disilenides with Carboxylic Acid Chlorides2007

    • Author(s)
      I. Bejan
    • Journal Title

      Angewandte Chemie, International Edition 46

      Pages: 3349-3352

    • Peer Reviewed
  • [Journal Article] Isolable Silylene Anion Radical: Structural Characteristics in the Solid State and in Solution2007

    • Author(s)
      S. Inoue
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 6696-6697

    • Peer Reviewed
  • [Journal Article] Reactivity of a Disilyne RSi≡SiR(R=Si^iPr[CH(SiMe_3)]_2)toward π-Bonds: Stereospecific Addition and a New Route to an Isolable 1,2-Disilabenzene2007

    • Author(s)
      R. Kinjo
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 7766-7767

    • Peer Reviewed
  • [Journal Article] Two-Coordinate Group 13 Element(Al, Ga)Centered Cations Formedby Silyl Group Migration: Synthesis and Characterization2007

    • Author(s)
      M. Nakamoto
    • Journal Title

      Chemistry Letters 36

      Pages: 984-985

    • 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

    • Peer Reviewed
  • [Journal Article] Heavy Ferrocene: A Sandwich Complex Containing Si and Ge Atoms2007

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

      Journal of the American Chemical Society 129

      Pages: 10340-10341

    • Peer Reviewed
  • [Journal Article] Air-Stable Disilacyclopropene with a Si=C bond and Its Conversion to Disilacyclopropenylium Ion: Silicon-Carbon Hybrid 2π-Electron Systems2007

    • Author(s)
      M. Igarashi
    • Journal Title

      Journal of the American Chemical Society 129

      Pages: 12660-12661

    • Peer Reviewed
  • [Journal Article] (η^5-Cyclopentadienyl)(η^4-tetrasila- and η^4-trisilangermacyclobutadiene)- cobalt: Sandwich Complexes Featuring Heavy Cyclobutadiene Ligands2007

    • Author(s)
      K. Takanashi
    • Journal Title

      European Journal Inorganic Chemistry

      Pages: 5471-5474

    • Peer Reviewed
  • [Journal Article] Aromaticity of Group 14 Organometallics: Experimental Aspects2007

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

      Angewandte Chemie, International Edition 46

      Pages: 6596-6620

    • 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

    • Peer Reviewed
  • [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
    • Year and Date
      20071213-15
  • [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、及び窪素多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
    • Year and Date
      20071213-15
  • [Presentation] ホスファシレンの合成および反応性2007

    • Author(s)
      川井愛美
    • 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
    • Year and Date
      20071213-15
  • [Presentation] Reactivity of Disilacyclopropene: Thermolysis, Photolysis, and Reduction2007

    • Author(s)
      M. Igarashi
    • 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
    • Year and Date
      20071101-03
  • [Presentation] Utility of sp^2-Type Sily1 Anion: Synthesis and Structure of Hydrosilene and Bory1-substituted Disilene2007

    • Author(s)
      S Inoue
    • 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
    • Year and Date
      20071101-03
  • [Presentation] Synthesis, Structure and Reactivities of the Novel Phosphasilene2007

    • Author(s)
      M. Kawai
    • 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
    • Year and Date
      20071101-03
  • [Presentation] Synthesis, Structure and Isomerization of the Heavy 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
    • Year and Date
      20071101-03
  • [Presentation] Synthesis of Intramoleculaly Coordinated Cyclic Disilylgermylene2007

    • Author(s)
      T. Oikawa
    • 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
    • Year and Date
      20071101-03
  • [Presentation] The Reactions of Isolable Disilyne with Carboxylic Acids and Amides2007

    • Author(s)
      M. Sunako
    • 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
    • Year and Date
      20071101-03
  • [Presentation] Si_4-W Systems: Tungsten Complexes Featuring η^4-and η^2-Coordination of the Si_4-Ligand2007

    • Author(s)
      K. Takanashi
    • 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
    • Year and Date
      20071101-03
  • [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
    • Year and Date
      20071101-03
  • [Presentation] Synthesis of Trisilacyclopenta-1, 4-diene Derivative and its Conversion to Lithium Trisilacyclopentadienide2007

    • Author(s)
      H. Yasuda
    • 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
    • Year and Date
      20071101-03
  • [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
    • Year and Date
      20071027-28
  • [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
    • Year and Date
      20071027-28
  • [Presentation] シクロブタジエンジアニオン、テトラシラビシクロ[1.1.10]ブタンジアニオンアルカリ土類金属塩:合成と構造2007

    • Author(s)
      高梨 和憲
    • Organizer
      第54回有機金属化学討論会
    • Place of Presentation
      広島大学、東広島市
    • Year and Date
      20071027-28
  • [Presentation] シクロプロペニリウムイオンの高周期類縁体:トリシラ及びジシラシクロプロペニリウムアオンの合成、構造及び反応性2007

    • Author(s)
      五十嵐 正安
    • Organizer
      第57回有機反応化学討論会
    • Place of Presentation
      広島大学、広島
    • Year and Date
      20070927-28
  • [Presentation] テトラシリルジシレンの酸化反応:ジシレンカチオンラジカル及びトリシラアリルカトンの合成と構造2007

    • Author(s)
      井上 茂義
    • Organizer
      第57回有機反応化学討論会
    • Place of Presentation
      広島大学、広島
    • Year and Date
      20070927-28
  • [Presentation] ケイ素系樹状高分子:ポリシランデンドリマーの合成と物性2007

    • Author(s)
      関口 章
    • Organizer
      第56回高分子討論会、元素の特性を活かす高分子
    • Place of Presentation
      名古屋工業大学
    • Year and Date
      20070919-21
  • [Presentation] Multiple Bonded Silicon Chemistry: From Double Bond to Triple Bond2007

    • Author(s)
      A. Sekiguchi
    • Organizer
      4th European Silicon Days
    • Place of Presentation
      Bath, UK
    • Year and Date
      20070909-11
  • [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
    • Year and Date
      20070812-16
  • [Presentation] Conversion of a Si=Si Double Bond Into a Si=C Double Bond: Synthesis and Characterization of Silyl Anion-substituted Silene and Cyclic Silene from the Reaction of sp^2-Type Silyl Anion2007

    • Author(s)
      S. Inoue
    • Organizer
      14th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis
    • Place of Presentation
      Nara, Japan
    • Year and Date
      20070802-06
  • [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
    • Year and Date
      20070802-06
  • [Presentation] Interplay of Experiment and Theory: The Chemistry of Disilyne with a Silicon-Silicon Triple Bond2007

    • Author(s)
      A. Sekiguchi
    • Organizer
      International Symposium on Molecular Theory for Real Systems
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20070727-29
  • [Presentation] From Organic Aromatics to Heavy Aromatics: Recent Experimental Developments in Organosilicon Chemistry2007

    • Author(s)
      A. Sekiguchi
    • Organizer
      12th International Symposium on Novel Aromatic Compounds
    • Place of Presentation
      Awaji Island, Hyogo, Japan
    • Year and Date
      20070722-27
  • [Presentation] E_4^<2-> M^<2+>(E=C, Si; M=Alkaline Earth Metal)Systems: Aromatic Cyclobutadiene Dianion and Nonaromatic Tetrasilabicylo[1.1.0]butane Dianion2007

    • Author(s)
      K. Takanashi
    • Organizer
      12th International Symposiun on Novel Aromatic Compounds
    • Place of Presentation
      Awaji Island, Hyogo, Japan
    • Year and Date
      20070722-27
  • [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
    • Year and Date
      20070722-27
  • [Presentation] Silicon Derivatives of a cyclopropenylium Ion: The Persila-type and Silicon-carbon Hybrid-type 2π Aromatic Compounds2007

    • Author(s)
      M. Igarashi
    • Organizer
      12th International Symposium on Novel Aromatic Compounds
    • Place of Presentation
      Awaji Island, Hyogo, Japan
    • Year and Date
      20070722-27
  • [Book] Silicon-, Germanium-, and Tin-Centered Cations, Radicals, and Anions. Reviews of Reactive Intermediate Chemistry2007

    • Author(s)
      V. Ya. Lee
    • Total Pages
      74
    • Publisher
      Wiley Interscience
  • [Remarks]

    • URL

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

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Published: 2010-02-04   Modified: 2016-04-21  

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