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2011 Fiscal Year Final Research Report

Research on Low-Coordinate and Multiply-Bonded Compounds of Heavier Main Group Elements

Research Project

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Project/Area Number 19105001
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Organic chemistry
Research InstitutionUniversity of Tsukuba

Principal Investigator

SEKIGUCHI Akira  筑波大学, 数理物質系, 教授 (90143164)

Co-Investigator(Kenkyū-buntansha) ICHINOHE Masaaki  筑波大学, 数理物質系, 准教授 (90271858)
LEE Vladimir  筑波大学, 数理物質系, 講師 (90375410)
NAKAMOTO Masaaki  筑波大学, 数理物質系, 講師 (90334044)
Project Period (FY) 2007 – 2011
Keywords元素化学 / 高周期典型元素 / 錯体 / 常磁性 / パイ電子 / 芳香族
Research Abstract

We have developed novel sophisticated synthetic strategies for the preparation of highly challenging classes of low-coordinate derivatives of the heavier main group elements (multiply-bonded compounds such as disilynes with silicon-silicon triple bonds, isolable Si-, Ge-, and Sn-centered cations, radicals, and anion-and cation-radicals, Si and Ge heterocycles and their uses as ligands for transition metals etc.). We also performed the detailed analysis of their structural and synthetic properties, and carried out the systematic study of the basic similarities and differences between these new species and their organic analogues.

  • Research Products

    (37 results)

All 2012 2011 2010 2009 2008 2007 Other

All Journal Article (16 results) (of which Peer Reviewed: 16 results) Presentation (13 results) Book (7 results) Remarks (1 results)

  • [Journal Article] A New Disilene with π-Accepting Groups from the Reaction of Disilyne RSi≡SiR (R=Si^iPr[CH(SiMe_3)_2]) with Isocyanides2012

    • Author(s)
      K. Takeuchi, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 134 Pages: 2954-2957

    • DOI

      10.1021/ja212065a

    • Peer Reviewed
  • [Journal Article] [[(Me_3Si)_2CH]_2^iPrSi(NHC)Si=Si(Me)Si^iPr[C H(SiMe_3)_2]_2]^+ : A Molecule with Disilenyl Cation Character2012

    • Author(s)
      T. Yamaguchi, M. Asay, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 134 Pages: 836-839

    • DOI

      10.1021/ja210669n

    • Peer Reviewed
  • [Journal Article] Access to a Stable Si_2N_2 4-Membered Ring with Non-Kekule Singlet Biradical Character from a Disilyne2011

    • Author(s)
      K. Takeuchi, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 133 Pages: 12478-12481

    • DOI

      10.1021/ja2059846

    • Peer Reviewed
  • [Journal Article] Isolable p-and m-[(tBu_2MeSi)_2Si]_2C_6H_4 : Disilaquinodimeth-ane vs. Triplet Bis(silyl radical)2011

    • Author(s)
      T. Nozawa, M. Nagata, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 133 Pages: 5773-5775

    • DOI

      10.1021/ja2014746

    • Peer Reviewed
  • [Journal Article] From Tetragermacyclobutene to Tetragermacyclobutadiene Dianion to Tetragermacyclobutadiene Transition Metal Complexes2011

    • Author(s)
      V. Ya. Lee, Y. Ito, H. Yasuda, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 133 Pages: 5103-5108

    • DOI

      10.1021/ja111596g

    • Peer Reviewed
  • [Journal Article] Unsymmetrically Substituted Disilyne Dsi_2^iPrSi-Si≡Si-SiNpDsi_2(Np=CH_2^tBu) : Synthesis and Characterization2010

    • Author(s)
      Y. Murata, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 132 Pages: 16768-16770

    • DOI

      DOI:10.1021/ja1091744

    • Peer Reviewed
  • [Journal Article] A N-Heterocyclic Carbene (NHC).Disilyne Complex and Its Unusual Reactivity toward ZnCl22010

    • Author(s)
      T. Yamaguchi, A. Sekiguchi, M. Driess
    • Journal Title

      J. Am. Chem. Soc

      Volume: 132 Pages: 14061-14063

    • DOI

      DOI:10.1021/ja107160g

    • Peer Reviewed
  • [Journal Article] Addition of Amines and Hydroborane to the Disilyne RSi≡SiR (R=SiiPr[CH(SiMe_3)_2]_2) Giving Amino-and Boryl-substituted Disilenes2010

    • Author(s)
      K. Takeuchi, M. Ikoshi, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 132 Pages: 930-931

    • DOI

      DOI:10.1021/ja910157h

    • Peer Reviewed
  • [Journal Article] η^5-1, 2, 3-Trisilacyclopentadienyl-A Ligand for Transition Metal Complexes : Rhodium Half-Sandwich and Ruthenium Sandwich2009

    • Author(s)
      H. Yasuda, V. Ya. Lee, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 131 Pages: 9902-9903

    • DOI

      DOI:10.1021/ja9038664

    • Peer Reviewed
  • [Journal Article] Si_3C_2-Rings : From a Nonconjugated Trisilacyclopentadiene to an Aromatic Trisilacyclopentadienide and Cyclic Disilenide2009

    • Author(s)
      H. Yasuda, V. Ya. Lee, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 131 Pages: 6352-6353

    • DOI

      DOI:10.1021/ja901881z

    • Peer Reviewed
  • [Journal Article] Base-Free Molybdenum and Tungsten Bicyclic Silylene Complexes Stabilized by a Homoaromatic Contribution2009

    • Author(s)
      K. Takanashi, V. Ya. Lee, T. Yokoyama, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 131 Pages: 916-917

    • DOI

      DOI:10.1021/ja8088313

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

    • Author(s)
      S. Inoue, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 130 Pages: 6078-6079

    • DOI

      DOI:10.1021/ja801761w

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

    • Author(s)
      A. Sekiguchi, T. Tanaka, M. Ichinohe, K. Akiyama
    • Journal Title

      J. Am. Chem. Soc

      Volume: 130 Pages: 426-427

    • DOI

      DOI:10.1021/ja077628v

    • 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, M. lchinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 129 Pages: 12660-12661

    • DOI

      DOI:10.1021/ja075740n

    • 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, M. Ichinohe, A. Sekiguchi, N. Takagi, M. Sumimoto, S. Nagase
    • Journal Title

      J. Am. Chem. Soc

      Volume: 129 Pages: 7766-7767

    • DOI

      DOI:10.1021/ja072759h

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

    • Author(s)
      S. Inoue, M. Ichinohe, A. Sekiguchi
    • Journal Title

      J. Am. Chem. Soc

      Volume: 129 Pages: 6096-6097

    • DOI

      DOI:10.1021/ja0711314

    • Peer Reviewed
  • [Presentation] New π-bonded Molecules : Disilyne RSi≡SiR (R=Si^iPr[CH(SiMe_3)_2]_2 with a Silicon-Silicon Triple Bond and Its 2Unusual Reactivity toward NHC2011

    • Author(s)
      A. Sekiguchi
    • Organizer
      The 15th Korea-Japan Joint Symposium on Organ metallic and Coordination Chemistry for Renewable Energy Research
    • Place of Presentation
      Ramada Plaza Hotel, Jeju, Korea
    • Year and Date
      2011-10-07
  • [Presentation] Ion Radicals of Unsaturated Silicon Compounds : The Cation-Radical and Anion-Radical of Disilene, and the Anion-Radical of Disilyne2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem)
    • Place of Presentation
      Honolulu, Hawaii, USA
    • Year and Date
      2010-12-17
  • [Presentation] New π-bonded Molecules : Disilynes RSi≡SiR with Silicon-Silicon Triple Bonds and Their Unusual Reactivity2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem)
    • Place of Presentation
      Honolulu, Hawaii, USA
    • Year and Date
      2010-12-16
  • [Presentation] Anion-Radicals of Disilene, Anion-Radical of Disilyne2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      3rd Asian Silicon Symposium (ASiS III)
    • Place of Presentation
      Hangzhou, China
    • Year and Date
      2010-10-18
  • [Presentation] New π-Bonded Molecules : Disilynes RSi≡SiR with Silicon-Silicon Triple Bonds and Their Unusual Reactivity2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      24th International Conference Organometallic Chemistry
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      2010-07-20
  • [Presentation] Germanium Unsaturated Ring Systems with Aromaticity and Homoaromaticity2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      13th International Conference on the Coordination and Organometallic Chemistry of Germanium Tin and Lead
    • Place of Presentation
      Graz, Austria
    • Year and Date
      2010-07-12
  • [Presentation] New π-bonded Molecules : Disilynes with a Silicon-Silicon Triple Bond and Its Unusual Reactivity2010

    • Author(s)
      A. Sekiguchi
    • Organizer
      43rd Silicon Symposium
    • Place of Presentation
      University of Missouri-St. Louis, USA
    • Year and Date
      2010-05-22
  • [Presentation] New Heavy Ligands : Transition Metal Complexes of Tetrasilacyclobutadiene and Bicyclic Silylene2009

    • Author(s)
      A. Sekiguchi
    • Organizer
      5th European Silicon Days
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      2009-09-22
  • [Presentation] The Chemistry of Disilyne with a Silicon-Silicon Triple Bond : A New Entry to Multiple Bond Chemistry2009

    • Author(s)
      A. Sekiguchi
    • Organizer
      42nd IUPAC Congress
    • Place of Presentation
      Glasgow, Scotland, UK
    • Year and Date
      2009-08-05
  • [Presentation] A New Type π-Bonded Compound : The Chemistry of a Silicon-Silicon Triple Bond2009

    • Author(s)
      A. Sekiguchi
    • Organizer
      The International Symposium on Reactive Intermediates and Unusual Molecules (ISRIUM2009)
    • Place of Presentation
      the Liblice Castle near Prague, Czech Republic
    • Year and Date
      2009-07-09
  • [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
    • Year and Date
      2008-06-05
  • [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
      2007-09-11
  • [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
      2007-08-13
  • [Book] Organ metallic Compounds of Low-Coordinate Si, Ge, Sn and Pb : From Phantom Species to Stable Compounds (431 pages)2010

    • Author(s)
      V. Ya. Lee and A. Sekiguchi
    • Total Pages
      431
    • Publisher
      John Wiley and Sons, Ltd
  • [Book] Strained Hydrocarbons. Beyond the van't Hoff and Le Bel Hypothesis ; H. Doziuk Ed2009

    • Author(s)
      V. Ya. Lee and A. Sekiguchi
    • Total Pages
      82-102
    • Publisher
      Wiley-VCH, Chapter 2
  • [Book] Polysilane Dendrimers. Silicon Containing Dendritic Polymers ; P. R. Dvornic and M. J. Owen Eds2009

    • Author(s)
      M. Nanjo and A. Sekiguchi
    • Total Pages
      75-96
    • Publisher
      Springer, Chapter 4
  • [Book] 新しいπ電子系化合物-ジシリンの化学:特集/未来技術基盤としてのパイ電子科学2009

    • Author(s)
      関口章
    • Total Pages
      47[863]-52[868]
    • Publisher
      化学工業
  • [Book] 革新論文から見たこの10年の進歩と未来, 元素化学におけるブレークスルー2009

    • Author(s)
      関口章
    • Total Pages
      54-58
    • Publisher
      別冊化学(化学同人)
  • [Book] 『化学と工業』誌8月号特集「有機ケイ素化学」2008

    • Author(s)
      関口章
    • Total Pages
      785-788
    • Publisher
      ケイ素多重結合の形成:ジシレン化学からジシリン化学へ
  • [Book] Silicon-, Germanium-, and Tin-Centered Cations, Radicals, and Anions. Reviews of Reactive Intermediate Chemistry2007

    • Author(s)
      V. Ya. Lee and A. Sekiguchi
    • Total Pages
      47-120
    • Publisher
      Eds.: M. S. Platz, R. A. Moss, M. Jones, Jr., Wiley, Chapter 2
  • [Remarks]

    • URL

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

URL: 

Published: 2013-07-31  

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