Development of Heavy Group-14 Element Unsaturated Clusters That Contain an Unsual Geometry

2020 Fiscal Year Final Research Report

• Project/Area Number: 17H03015
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Organic chemistry
• Research Institution: Tohoku University
• Principal Investigator: Iwamoto Takeaki 東北大学, 理学研究科, 教授 (70302081)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 不飽和ケイ素クラスター / ケイ素 / π結合 / 反転した立体配置

Outline of Final Research Achievements

In this project, we synthesized unsaturated molecular silicon clusters that contain an unconventional double bond with an inverted (hemispheroidal) geometry and disclosed their electronic property and reactivity. Notably, 1,3-dihalobicyclo[1.1.0]tetrasilanes obtained from the reaction of the syntheized unsaturated molecular silicon clusters and a haloalkane exhibit an unsupported single pi-bond between the bridgehead silicon atoms in the crystalline state. The corresponding all carbon compounds have not yet been synthesized so far. The unconventional bondings observed in the compounds developed in this study are expected to be key structures of novel functional materials.

Free Research Field

有機典型元素化学

Academic Significance and Societal Importance of the Research Achievements

化学結合は分子の構造、物性と反応性を支配しており、従来見られない化学結合を持つ化合物の創製は化学結合の理解のみならず新しい物質変換法の開発や物質機能の発見に貢献します。本課題では反転した立体配置の二重結合やπ結合のみからなる単結合など、新しい化学結合を持つ化合物を創製し、高周期14族元素化合物の新たな可能性を切り開きました。今後これらの新しい結合を持つ化合物を機軸にした新規物質機能の登場が期待されます。