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Updated: Oct 13, 2025

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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動力的に安定した結晶三角質の合成と分離

Shinobu Arikawa1, Akihiro Shimizu1, Daisuke Shiomi2

  • 1Division of Chemistry, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.

Journal of the American Chemical Society
|November 12, 2021
PubMed
まとめ

研究 者 たち は,結晶 三角 素 を 合成 し,その 縁 に 大 量 の 置換 物質 を 加え て 初めて 分離 し まし た. この突破により,三重基底状態の新型炭化水素の研究が可能になった.

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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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