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- W2130440676 abstract "Kinetische Daten für die Umsetzung substituierter 1,3-Diene mit Tetracyanethylen (TCNE) und anderen Dienophilen werden unter Zugrundelegung des FMO-Modells interpretiert. Während qualitativ die Erwartungen erfüllt sind, stellt man ein Versagen quantitativer Korrelationen fest. Dies zeigt, daß bei Diels-Alder-Reaktionen neben den HOMO-LUMO-Abständen weitere Faktoren eine bedeutsame Rolle spielen, z. B. der 1,4-Abstand im Dien, die Gleichgewichtslage cisoide ⇌ transoide Konformation des Diens und andere. Die kinetischen Daten stehen nicht im Widerspruch mit der Vorstellung eines konzertierten Ablaufs der Cycloadditionen. Reactivity of Substituted 1,3-Butadienes in Diels-Alder-Reactions Kinetic data for the reaction of substituted 1,3-dienes with tetracyanoethylene (TCNE) and other dienophiles are interpreted in terms of the FMO-model. While the expectations are fulfilled qualitatively, the kinetic data cannot be correlated quantitatively. This shows that in Diels-Alder reactions besides HOMO-LUMO separation other factors play an important role, for instance the 1,4-distance in the diene and the conformational equilibrium cisoid ⇌ transoid of the diene. The kinetic data are in accord with a one-step mechanism of the cycloaddition reaction." @default.
- W2130440676 created "2016-06-24" @default.
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- W2130440676 date "1980-05-01" @default.
- W2130440676 modified "2023-10-12" @default.
- W2130440676 title "Reaktivität substituierter 1,3‐Butadiene in Diels‐Alder‐Reaktionen" @default.
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- W2130440676 doi "https://doi.org/10.1002/cber.19801130505" @default.
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