Synthesis of hypervalent compounds bearing a bond between highly coordinated main group elements and creation of new functional groups

• Project/Area Number: 18K05074
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 33010:Structural organic chemistry and physical organic chemistry-related
• Research Institution: Gakushuin University
• Principal Investigator: Kano Naokazu 学習院大学, 理学部, 教授 (00302810)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 結合 / 超原子価化合物 / 典型元素 / 官能基 / リン / ケイ素 / ゲルマニウム / 典型元素化合物 / 化学結合 / 硫黄 / ホウ素 / 高配位化合物 / 典型元素化学

Outline of Final Research Achievements

The purpose of this study is creation of new bonding species containing a hypervalent or hypercoordinated main group element and elucidation of their reactivity. Pentacoordinated phosphorus and silicon species bearing a bond to a silicon or boron atom were attempted to be synthesized. A sulfur-substituted pentacoordinated silicon species and its germanium analogue was synthesized as a stable compound and characterized by X-ray crystallographic analysis and NMR spectroscopy. They showed different stability depending on the group 14 element.

Academic Significance and Societal Importance of the Research Achievements

有機化学がこれまでに官能基の特性を活用して発展してきたことを考えると、新種の結合や官能基を創り出すことは学術的に意義深い研究である。本研究で目的としている高配位状態にある典型元素間の結合をもつ化学種は、新規な構造をもつ化学種であり、その高配位状態に起因する特徴的な反応性を示せば、新しい官能基としてみなすことができる。本研究の目的化合物の性質の一端を明らかにすることにより、将来的に有機合成反応への活用が期待できる。

Research Products

• [Presentation] Synthesis and Structure of an Anionic Pentacoordinated Silicon-Sulfur Bonded Compound and Its Germanium Analogue (2021)
  • Author(s): Naokazu Kano, Shunsaku Yabuki, Tatsuya Morofuji
  • Organizer: 19th International Symposium on Silicon Chemistry 2021
  • Int'l Joint Research
• [Presentation] Synthesis and Structure of an Anionic Pentacoordinated Germanium-Sulfur Bonded Compound (2019)
  • Author(s): S. Yabuki, T. Morofuji, N. Kano
  • Organizer: International Conference on the Coordination and Organometallic Chemistry of Germanium, Tin and Lead (ICCOC-GTL16)
  • Int'l Joint Research
• [Presentation] 高配位状態にある典型元素間の結合の構築 (2019)
  • Author(s): 狩野直和
  • Organizer: 大阪府立大学有機化学研究会
  • Invited
• [Presentation] Synthesis, Structure and Reactions of Anionic Pentacoordinated Group 14 Element-Sulfur Bonded Compounds (2019)
  • Author(s): S. Yabuki, T. Morofuji, N. Kano
  • Organizer: 5th NCTU-Gakushuin Student Symposium
  • Int'l Joint Research
• [Presentation] アニオン性5配位14族元素－硫黄結合化合物の合成 (2019)
  • Author(s): 矢吹峻作、諸藤達也、狩野直和
  • Organizer: 第46回有機典型元素化学討論会
• [Presentation] Synthesis and Structure of a Phosphinoboronate Ester Bearing a Fused Ring Framework (2018)
  • Author(s): Naokazu Kano, Nathan J. O’Brien
  • Organizer: The 15th International Symposium on Inorganic Ring Systems (IRIS-15)
  • Int'l Joint Research
• [Presentation] Fluorescent Azobenzenes Bearing Bis(pentafluorophenyl)boryl Groups (2018)
  • Author(s): Naokazu Kano
  • Organizer: 4th NCTU-Gakushuin Symposium
  • Int'l Joint Research / Invited
• [Presentation] 高配位状態にある典型元素間の結合の構築 (2018)
  • Author(s): 狩野直和
  • Organizer: 第45回有機典型元素化学討論会
  • Invited
• [Remarks] 学習院大学理学部化学科狩野研究室研究内容
  • URL: https://www-cc.gakushuin.ac.jp/~20180132/research.html