Synthesis and reactivity of heavier group 14 elements-carbon multiple-bond species with a highly polarized structure

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05091
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Kindai University
• Principal Investigator: Matsuo Tsukasa 近畿大学, 理工学部, 教授 (90312800)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 典型元素 / 主要族元素 / 多重結合 / 不飽和結合 / テトリレン / テトレン / カルベン / 立体保護基

Outline of Final Research Achievements

Halogen-substituted divalent species of heavier group 14 elements, halotetrylenes, have been obtained by taking advantage of the excellent steric protection of the fused-ring bulky Rind groups. The reactions between the halotetrylenes and various carbenes such as triplet carbenes and singlet N-heterocyclic carbenes (NHC) have been investigated, producing heavier group 14 elements-carbon doubly-bonded species, halotetrenes, and halotetrylene-NHC adducts and tetryliumylidene ions-bis-NHC adducts. The molecular structures and chemical bonding of the resulting unsaturated compounds have been elucidated by the experimental and theoretical studies. A series of π-conjugated digermene compounds, in which various aryl groups are conjugated with Ge=Ge double bonds, have also been synthesized, and their structures and electronic properties have been investigated.

Free Research Field

元素化学

Academic Significance and Societal Importance of the Research Achievements

本研究により得られた成果は、元素化学の新しい研究戦略・研究指針を与えるものであり、新規な典型元素化合物の合成や分子構造の解明、特異な化学結合や電子構造に基づく物性や機能、反応性に関する研究内容は、当該分野への顕著な学術的貢献が期待できる。低原子価の典型元素を含む新しい共役電子系物質は、従来の炭素をベースとした材料を凌駕する光電子物性を秘めており、今後の社会経済の活性化に貢献する大変重要な科学技術につながる可能性が期待できる。