2011 Fiscal Year Final Research Report
World-Record Molecules : The longest C-C bond and hypervalency
| Project/Area Number |
21350022
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
SUZUKI Takanori 北海道大学, 大学院・理学研究院, 教授 (70202132)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIWARA Kenshu 北海道大学, 大学院・理学研究院, 准教授 (20222268)
KAWAI Hidetoshi 北海道大学, 大学院・理学研究院, 助教 (50322798)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 構造有機化学 / 物理有機化学 |
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| Research Abstract |
Based on our own results for hexaphenylethane derivative studied so far, it has been proposed that the compound with a ultralong C-C bond would be generated as a stable entity when the two unpaired electron are forced to stay in a proximity in the corresponding diradical without isomerization into the closed-shell species through resonance/peri-cyclic reactions. Based on the above concept have been designed a series of tetraarylpyracenes where the longest C-C bond ever [1.791(3)Å] was determined experimentally. The expandability of such prestrained bonds was also uncovered.
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Research Products
(28 results)
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[Journal Article] Multi-input-Multi-output Molecular Response System Based on Dynamic Redox Behavior of 3,3,4,4-Tetraaryldihydro[5]helicene Derivatives : Reversible Formation/Destruction of Chiral Fluorophore and Modulation of Chiroptical Properties by Solvent Polarity2009
Author(s)
T. Suzuki, Y. Ishigaki, T. Iwai, H. Kawai, K. Fujiwara, H. Ikeda, Y. Kano, K. Mizuno
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Journal Title
Chem. Eur. J.
Volume: 15
Pages: 9434-9441
Peer Reviewed
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[Journal Article] Negligible diradical character for the ultralong C-C bond in 1,1,2,2-tetraarylpyracene derivatives at room temperature2009
Author(s)
T. Takeda, H. Kawai, R. Herges, E. Mucke, Y. Sawai, K. Murakoshi, K. Fujiwara, T. Suzuki
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Journal Title
Tetrahedron Lett (50th anniversary special issue)
Volume: 50
Pages: 3693-3697
Peer Reviewed
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