Creation of Unexplored Highly Reactive Chemical Species with pi-Electrons of Main Group Elements

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05425
• 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: Rikkyo University
• Principal Investigator: MINOURA Mao 立教大学, 理学部, 教授 (30274046)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 元素化学 / ケイ素 / ゲルマニウム / リン / アンチモン / 結晶構造 / 立体保護

Outline of Final Research Achievements

In this research project, in order to understand the properties of π-electrons involving heavier main group elements, we utilized Trp* as a versatile alkyl stereoprotecting group based on a triptycyl skeleton, which was developed through a new molecular design, to provide sufficient kinetic stabilization to highly reactive π-bonds and elucidate the properties of fundamental π-bonds that are confined to 2nd period elements of the periodic table. The target molecules were dialkyl diphosphenes with group 15 inter-elemental π-bonds, dialkyl germylenes, a group 14 divalent chemical species, and disilene dianions with a negative charge on each silicon double bond (disilenes).

Free Research Field

有機元素化学

Academic Significance and Societal Importance of the Research Achievements

本研究課題の標的分子はこれまでに検討例すらない化学結合を基軸とする挑戦的基礎研究であり、これらの未踏分子群の創製は、教科書の記載事項を増やすだけでなく、新しい元素化学のブレークスルーとなる。これらの未踏有機典型元素π電子化合物の分子設計と自在制御技術による学理の構築が、将来、新しい化学種の領域と典型元素化学結合を鍵とする新反応を拓くと期待出来る他、材料科学分野への典型元素π結合を供給するビルディングブロックとなり得る点で学術的・社会的意義を見出せる。