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Updated: Jul 11, 2026

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

フルレンの反応に対するクセノンの影響

Michael Frunzi1, R James Cross, Martin Saunders

  • 1Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, USA.

Journal of the American Chemical Society
|October 11, 2007
PubMed
まとめ

フルレンケージ (Xe@C60) にあるクセノン (Xe) の存在は,ヘリウム (He@C60) に比べて化学反応の均衡を大幅に変化させる. この効果は温度に依存し,反応エンタルピーとエントロピーに影響します.

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Electrophilic Addition to Alkynes: Halogenation

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Electrophilic 1,2- and 1,4-Addition of HX to 1,3-Butadiene

The electrophilic addition of hydrogen halides such as HBr to alkenes and nonconjugated dienes gives a single product as per Markovnikov’s rule.
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The addition of a hydrogen halide to 1,3-butadiene gives a mixture of 1,2- and 1,4-adducts. Since more substituted alkenes are more stable, the 1,4-adduct is expected to be the major product. However, the product distribution is strongly influenced by temperature; low temperature favors the 1,2-adduct, whereas the 1,4-adduct is predominant at high temperature.
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Nucleophilic Aromatic Substitution: Elimination–Addition

Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is confirmed through isotopic...