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Construction of Hypervalent Organometalloidal Systems in Main-group Elements and Exploration of their New Reactions

Research Project

Project/Area Number 63470017
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 有機化学一般
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

AKIBA Kin-ya  Hiroshima University, Faculty of Science Professor, 理学部, 教授 (20011538)

Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1989: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1988: ¥4,400,000 (Direct Cost: ¥4,400,000)
KeywordsMetalloidal Main-group Element / Hypervalency / Highly Coordinated Compound / Antimony / Bismuth / Ate Complex / Transannular Interaction / Reductive Elimination Reaction / hypervalent / シリケ-ト / 二座配位子 / 三座配位子 / アート錯体 / 位置異性化反応
Research Abstract

1. Various hypervalent compounds of metalloidal main-group elements (Sn, Sb, Bi etc.) were synthesized by using a specially designed bidentate ligand (Martin's ligand). Treatment of these hypervalent compounds with organolithiums or Grignard reagents converted then into the corresponding ate complexes (12-Sb-6, 12-Bi-6).
1) Halogenation,of the hypervalent antimony compounds (10-Sb-5) was investigated. Structure of ate complexes (12-Sb-6) and their isomerization mechanism were determined on the basis of spectral data.
2) A stable ate complex of bismuth (12-Bi-6) was prepared and its chemical behaviors were investigated.
3) Some ate complexes of tin (10-Sn-5) were prepared and their structure was clarified according to the NMR spectrum features.
2. Various azocine derivatives containing antimony or bismuth atom were synthesized by means of a new type tridentate ligand.
1) Transannular hypervalent interaction and bond formation was investigated on the basis of Hammett's linear relationship in NMR chemical shift of N-methyl group using. sigma m substituent constants.
2) Isomerization of stable geometry around main-group elements was discussed and reductive elimination in bismuth compounds was also studied.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 山下陽介: "Intramolecular Cyclization of o-silylbenzyl Alcohols with Elimination of Hydrocarbon via Hypervalent Silicon Intermediates;Effect of Structure on the Selectivity for Elimination" Tetrahedron Letters. 30. 725-728 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 秋葉欣哉: "First Example of Thermally Stable Hypervalent Bismuth Ate Complex(12-Bi-6)with Two Bidentate Ligands:Synthesis and Structure." Tetrahedron Letters. 30. 953-956 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 山本陽介: "Intramolecular Dissociative Isomerization and the Presence of Trans Influence in 12-Sb-6 Ate Complexes and Their Protonolysis." J.Am.Chem.Soc.111. 2276-2283 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 大方勝男: "Synthesis and Chemical Behaviors of 12-Substituted Dibenz〔c,f〕〔1,5〕azastibocine and Dibenz〔c,f〕〔1,5〕azabismocine Derivatives,Evidences of 10-Pn-4 Type Hypervalent Interactions." Tetrahedron Letters. 30. 4841-4844 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 大方勝男: "Transannular Bond Formation Detween the Antimony and the Nitrogen Atoms in Dibenz〔c,f〕〔1,5〕azastibocine System.Formation of X-Sb-X and X-Sb-N^+ Hypervalent Bond." Tetrahedron Letters. 29. 5401-5404 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Yohsuke Yamamoto, Yasuhiro Takeda, and Kin-ya Akiba: "Intramolecular Cyclization of o-Silylbenzyl Alcohols with Elimination of Hydrocarbon via Hypervalent Silicon Intermediate: Effect of the Selectivity for Elimination" Tetrahedron Lett., 30, 725-728 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Kin-ya, Akiba, Keisuke Ohdoi, and Yohsuke Yamamoto: "First Example of Thermally Stable Hypervalent Bismuth Ate Complex (12-Bi-6) with Two Bidentate Ligands: Synthesis and Structure" Tetrahedron Lett., 30, 953-956 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Yohsuke Yamamoto, Hisao Fujikawa, Hiroshi Fujishima, and Kin-ya Akiba: "Intramolecular Dissociative Isomerization and the Presence of Trans Influence in 12-Sb-6 Ate Complexes and Their Protonolysis" J. Am. Chem. Soc., 111, 2276-2283 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Katsuo Ohkata, Shin Takemoto, Masako Ohnishi and Kin-ya Akiba: "Synthesis and Chemical Behaviors of 12-Substituted Dibenz[c,f][1,5]azastibocine and Dibenz[c,f][1,5]azabismocine Derivatives: Evidences of 10-Pn-4 Type Hypervalent Interaction" Tetrahedron Lett., 30, 4841-4844 (1989).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Katsuo Ohkata, Masako Ohnishi, and Kin-ya Akiba: "Transannular Bond Formation between the Antimony and the Nitrogen Atoms in Dibenz[c,f][1,5]azastibocinee System. Formation of X-Sb-X and X-Sb-N Hypervalent Bond" Tetrahedron Lett., 29, 5401-5404 (1988).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 大方勝男: "Synthesis and Chemical Behaviors of 12-Substituted Dibenz[c,f][1,5]azastibocine and Dibenz[c,f][1,5]azabismocine Derivatives Evidences of 10-Pn-4 Type Hypervalent Interaction." Tetrahedron Letters. 30. 4841-4844 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Kin-ya Akiba: Tetrahedron Letters. 29. 3817-3820 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Kin-ya Akiba: Journal of The American Chemical Society. 110. 5576-5578 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Katsuu Ohkata: Tetrahedron Letters. 29. 5401-5404 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Kin-ya Akiba: Tetrahedron Letters. 30. (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] Yohsuke Yamamoto: Journal of American Chemical Society. 111. (1989)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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