Synthesis of Hexasilabenzene
Project/Area Number |
20K20447
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Project/Area Number (Other) |
19H05528 (2019)
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Research Category |
Grant-in-Aid for Challenging Research (Pioneering)
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Allocation Type | Multi-year Fund (2020) Single-year Grants (2019) |
Review Section |
Medium-sized Section 33:Organic chemistry and related fields
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Research Institution | Kyoto University |
Principal Investigator |
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Project Period (FY) |
2019-06-28 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥25,740,000 (Direct Cost: ¥19,800,000、Indirect Cost: ¥5,940,000)
Fiscal Year 2021: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2020: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Fiscal Year 2019: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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Keywords | ヘキサシラベンゼン / ケイ素 / ベンゼン / 芳香族化合物 |
Outline of Research at the Start |
ヘキサシラベンゼンはベンゼンの6個の炭素原子すべてをケイ素原子で置き換えた化合物であり、その構造的な美しさだけでなく、近年注目度の高いグラフェンのケイ素類縁体である「シリセン」の基本構造であるという科学的な重要性も相まって多くの化学者を惹きつけてきた。いわば典型元素化学における「夢化合物」の一つであり、その合成を指向した研究は枚挙にいとまがない。しかし未だ計算科学の域を出ない化合物であり、その合成は達成されていない。本研究では、これまでのヘキサシラベンゼン合成検討における問題点を抽出しそれらを克服する方法を考案し、その新たな合成経路、分子設計に基づいてヘキサシラベンゼンの合成を目指す。
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Outline of Final Research Achievements |
In the reductive coupling reactions of a pentabromodisilane having a bulky substituent, novel anionic and neutral unsaturated Si clusters with a central framework consisting of six Si atoms were obtained. Single crystal X-ray crystallography revealed that the obtained anionic Si cluster has a pentagonal pyramidal structure with six electrons delocalized between the apex Si atom and the cyclic Si5 moiety, suggesting unique three-dimensional aromaticity. The neutral cluster is an unstable valence isomer of the corresponding hexasilabenzene and can be utilized for the conversion to the isomeric hexasilabenzene.
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Academic Significance and Societal Importance of the Research Achievements |
ヘキサシラベンゼンはベンゼンの6個のC原子すべてをSi原子で置き換えた化合物であり、その構造的な魅力や基礎化学的重要性だけでなく、近年注目度の高いグラフェンのSi類縁体である「シリセン」の基本構造であるという機能物性科学的な重要性も相まって多くの化学者を惹きつけている。本研究では、ヘキサシラベンゼンの合成には至らなかったものの、その原子価異性体や三次元芳香族性を示す新規5角錐型Siクラスターの合成に成功するなど、構造、性質ともにその本質解明に近づいたと言え、本研究成果は、今後のヘキサシラベンゼン合成法に対して重要な指針を与えると考えられる。
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Report
(5 results)
Research Products
(110 results)
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[Journal Article] Glucose as a Protein-Condensing Cellular Solute2022
Author(s)
Noda, N., Jung, Y., Ado, G., Mizuhata, Y., Higuchi, M., Ogawa, T., Ishidate, F., Sato, S., Kurata, H., Tokitoh, N., Uesugi, M.
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Journal Title
ACS Chem. Biol.
Volume: 17
Issue: 3
Pages: 567-575
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Discovery of Self‐Assembling Small Molecules as Vaccine Adjuvants2020
Author(s)
Jin Shuyu、Vu Hue Thi、Hioki Kou、Noda Naotaka、Yoshida Hiroki、Shimane Toru、Ishizuka Shigenari、Takashima Ippei、Mizuhata Yoshiyuki、Beverly Pe Kathleen、Ogawa Tetsuya、Nishimura Naoya、Packwood Daniel、Tokitoh Norihiro、Kurata Hiroki、Yamasaki Sho、Ishii Ken J.、Uesugi Motonari
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Journal Title
Angewandte Chemie International Edition
Volume: 60
Issue: 2
Pages: 961-969
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Nature of the E---E' interactions (E, E' = O, S, Se, and Te) at naphthalene 1,8-positions with fine details of the structures: experimental and theoretical investigations2019
Author(s)
Satoko Hayashi, Manabu Uegaito, Taro Nishide, Eiichiro Tanaka, Waro Nakanishi, Takahiro Sasamori, Norihiro Tokitoh and Mao Minoura
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Journal Title
New J. Chem.
Volume: 43
Issue: 36
Pages: 14224-14237
DOI
Related Report
Peer Reviewed
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[Presentation] Synthetic Studies of 1-Germaazulene2019
Author(s)
T. Oshiro, Y. Mizuhata, N. Tokitoh
Organizer
The 16th International Conference on the Coordination and Organometallic Chemistry of Germanium, Tin, and Lead (ICCOC-GTL 2019), Saitama, Japan
Related Report
Int'l Joint Research
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