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Development of Heavy Group-14 Element Unsaturated Clusters That Contain an Unsual Geometry

Research Project

Project/Area Number 17H03015
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Organic chemistry
Research InstitutionTohoku University

Principal Investigator

Iwamoto Takeaki  東北大学, 理学研究科, 教授 (70302081)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Keywords不飽和ケイ素クラスター / ケイ素 / π結合 / 反転した立体配置 / 反転結合 / 不飽和クラスター / 高周期14族 / 立体配置 / ビシクロ[1.1.0]ブト-1(3)-エン / 異性化 / 付加反応
Outline of Final Research Achievements

In this project, we synthesized unsaturated molecular silicon clusters that contain an unconventional double bond with an inverted (hemispheroidal) geometry and disclosed their electronic property and reactivity. Notably, 1,3-dihalobicyclo[1.1.0]tetrasilanes obtained from the reaction of the syntheized unsaturated molecular silicon clusters and a haloalkane exhibit an unsupported single pi-bond between the bridgehead silicon atoms in the crystalline state. The corresponding all carbon compounds have not yet been synthesized so far. The unconventional bondings observed in the compounds developed in this study are expected to be key structures of novel functional materials.

Academic Significance and Societal Importance of the Research Achievements

化学結合は分子の構造、物性と反応性を支配しており、従来見られない化学結合を持つ化合物の創製は化学結合の理解のみならず新しい物質変換法の開発や物質機能の発見に貢献します。本課題では反転した立体配置の二重結合やπ結合のみからなる単結合など、新しい化学結合を持つ化合物を創製し、高周期14族元素化合物の新たな可能性を切り開きました。今後これらの新しい結合を持つ化合物を機軸にした新規物質機能の登場が期待されます。

Report

(4 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (16 results)

All 2020 2019 2018

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 4 results)

  • [Journal Article] An Isolable Tetrasilicon Analogue of a Planar Bicyclo[1.1.0]butane with π-Type Single-Bonding Character2020

    • Author(s)
      Nukazawa Takumi and Iwamoto Takeaki
    • Journal Title

      Journal of the American Chemical Society

      Volume: 142 Issue: 22 Pages: 9920-9924

    • DOI

      10.1021/jacs.0c03874

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reactions of a tetrasilabicyclo[1.1.0]but-1(3)-ene with carbon tetrachloride and methanol2019

    • Author(s)
      Nukazawa Takumi, Kosai Tomoyuki, Honda Shunya, Ishida Shintaro, Iwamoto Takeaki
    • Journal Title

      Dalton Transactions

      Volume: 48 Issue: 29 Pages: 10874-10880

    • DOI

      10.1039/c9dt01627a

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond2019

    • Author(s)
      Kobayashi Ryo, Ishida Shintaro, Iwamoto Takeaki
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 58 Issue: 28 Pages: 9425-9428

    • DOI

      10.1002/anie.201905198

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Tetrasilicon Analogue of Bicyclo[1.1.0]but-1(3)-ene Containing a Si=Si Double Bond with an Inverted Geometry2019

    • Author(s)
      Iwamoto Takeaki、Abe Takashi、Sugimoto Kunihisa、Hashizume Daisuke、Matsui Hiroshi、Kishi Ryohei、Nakano Masayoshi、Ishida Shintaro
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 58 Issue: 13 Pages: 4371-4375

    • DOI

      10.1002/anie.201900824

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transformative Si8R8 Siliconoids2018

    • Author(s)
      Akasaka Naohiko、Ishida Shintaro、Iwamoto Takeaki
    • Journal Title

      Inorganics

      Volume: 6 Issue: 4 Pages: 107-107

    • DOI

      10.3390/inorganics6040107

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Facile Skeletal Rearrangement of Polycyclic Disilenes with Bicyclo[1.1.1]pentasilanyl Groups2018

    • Author(s)
      Yokouchi Yuki、Ishida Shintaro、Iwamoto Takeaki
    • Journal Title

      Chemistry - A European Journal

      Volume: 24 Issue: 44 Pages: 11393-11401

    • DOI

      10.1002/chem.201801517

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Facile synthesis and bridgehead-functionalization of bicyclo[3.3.3]pentasiloxanes2018

    • Author(s)
      Yuki Yokouchi, Shintaro Ishida Shintaro, Tsunenobu Onodera, Hidetoshi, Takeaki Iwamoto
    • Journal Title

      Chemical Communications

      Volume: 54 Issue: 3 Pages: 268-270

    • DOI

      10.1039/c7cc08790j

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] 平面のケイ素骨格を持つビシクロ[1.1.0]テトラシランの構造2020

    • Author(s)
      糠澤拓実、岩本武明
    • Organizer
      日本化学会第100春季年会2020
    • Related Report
      2019 Annual Research Report
  • [Presentation] Isolable Two-coordinate Cyclic Alkylsilylenes2019

    • Author(s)
      Takeaki Iwamoto
    • Organizer
      The 2nd French-Russian International Conference-Workshop, Chemistry of Hypo and Hypercoordiated Compounds of the Group 14
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthesis and Reactions of a Cyclic Dialkylsilylene Containing a Robust Carbon-Based Substituent2019

    • Author(s)
      Takeaki Iwamoto
    • Organizer
      The 7th Asian Silicon Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Reactivity of Stable Two-coordinate Silicon Analogues of Carbenes2019

    • Author(s)
      Takeaki Iwamoto
    • Organizer
      Joint Meeting of the Tohoku Area Chemistry Societies
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 反転二重結合を持つテトラビシクロ[1.1.0]ブト-1(3)-エンの付加反応2019

    • Author(s)
      糠澤拓実、石田真太郎、岩本武明
    • Organizer
      第46回有機典型元素化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 特異な立体配置のケイ素-ケイ素結合を持つ化合物2019

    • Author(s)
      岩本武明
    • Organizer
      日本化学会第99春季年会2019
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 橋頭位にアリールチオ基を有するテトラシラビシクロ[1.1.0]ブタンの合成2019

    • Author(s)
      糠澤拓実、石田真太郎、岩本武明
    • Organizer
      日本化学会第99春季年会2019
    • Related Report
      2018 Annual Research Report
  • [Presentation] 歪んだ二環式ジシレンの合成と反応性2018

    • Author(s)
      糠澤拓実、石田真太郎、岩本武明
    • Organizer
      第22回ケイ素化学協会シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高度に歪んだ構造を持つジシレンの合成と性質2018

    • Author(s)
      糠澤拓実、石田真太郎、岩本武明
    • Organizer
      日本化学会第98春季年会2018
    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2022-01-27  

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