Development of Molecular Conversion Reactions Taking Advantage of the Reactivity of Transition Metal-Silicon/Germanium Multiple Bonds

2019 Fiscal Year Final Research Report

• Project/Area Number: 15H03782
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: Tohoku University
• Principal Investigator: TOBITA Hiromi 東北大学, 理学研究科, 教授 (30180160)
• Project Period (FY): 2015-04-01 – 2020-03-31
• Keywords: 有機金属錯体 / 遷移金属錯体 / 二重結合 / 三重結合 / ケイ素 / ゲルマニウム / 環化付加反応 / 触媒

Outline of Final Research Achievements

We synthesized a number of new complexes containing transition metal-heavier Group 14 element (Si, Ge) multiple bonds (double bonds, triple bonds, etc.), and clarified the characteristic molecular structures of them. We examined the reactions of them with various organic molecules, and discovered several new types of reactions such as cycloaddition reactions, in which the metal-Group 14 element multiple bonds played important roles. Moreover, taking advantage of the characteristic reactivity of these complexes, we succeeded in developing some transformation reactions of organic molecules mediated or catalyzed by these complexes.

Free Research Field

有機金属化学，錯体化学

Academic Significance and Societal Importance of the Research Achievements

炭素と遷移金属との間に多重結合を持つ錯体（カルベン錯体等）は，オレフィン・メタセシス反応等の触媒として有機合成化学において極めて重要な役割を果たしているが，その高周期14族元素類縁体の反応性の解明や応用に関する研究はほとんど進んでいなかった。本研究では，ケイ素およびゲルマニウム類縁錯体の系統的な合成と反応性の解明，さらに分子変換反応への応用に成功した。地球上に無尽蔵に存在するケイ素の有効利用に向けて，その社会的意義は大きい。