2011 Fiscal Year Final Research Report
Chemistry of σ Electron Systems Based on Inverted σ-bonded Compounds
| Project/Area Number |
20685004
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Organic chemistry
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| Research Institution | Tohoku University |
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Principal Investigator |
IWAMOTO Takeaki 東北大学, 大学院・理学研究科, 教授 (70302081)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 反転σ結合 / ケイ素 / ビシクロ[1.1.1]ペンタシラン / かご型化合物 / X 線結晶構 造解析 |
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| Research Abstract |
We focused on "inverted σ bonds" that show unusual geometry and electronic properties and we synthesize several heavier group-14 element compounds bearing the inverted σ bonded compounds as their components. We have successfully prepared a series of functionalized bicyclo[1.1.1]pentasilanes that are one of the smallest molecular silicon cluster. Using the bicyclopentasilane units we successfully synthesized a series of persila[n]staffanes and revealed remarkable conjugation between the silicon cages. We also synthesized a dimer of 1,3-disila- bicyclo[1.1.0]butane which has an inverted Si-Si σ bond between the bridgehead silicon atoms. UV-vis spectrum and DFT calculations of the dimer show that significant interactions exist between the bridgehead Si-Si bond in the disilabicyclobutane units.
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