2% cross-linked catalysts and 5-60% with more highly crosslinked catalysts, depending on catalyst activity, particle size, stirring rate, and reaction time.
The kinetic parameters of the restricted internal rotation about the amino nitrogen-ring carbon bond in 7V-R-2,4,6-trimtroanilines with R = CH2CH3, CH(CH3)2, and C(CH3)3 were determined in liquid dichloromethane at temperatures between +30 and -80°b y comparison of measured and calculated complete nmr line shape functions. It was found that the barrier £a decreases and the frequency of jumping over the barrier strongly increases with increasing size of R, in concert with the results of HMO calculations based on a simplified model which, however, describes numerous experimental data on the conformation and internal rotation of nitroanilines. Nitroanilines appear to be the only planar, or effectively planar, anilines with detected internal rotation around the Ar-N bond.
Für die innere Rotation um die Amino‐Stickstoff‐Ring‐Kohlenstoff‐Bindung in N‐R‐2,4,6‐Trinitroanilinen (mit den Substituenten R = Propyl, Butyl, Hexyl, Octyl) in Dichlormethan wurden durch den Vergleich gemessener und berechneter vollständiger Kernresonanzlinienformen die kinetischen Parameter im Temperaturbereich zwischen 25°C und ‐80°C bestimmt.
Für Enolether wie (II), die mit dem Ethylen (I) Addukte wie (III) "ergeben, wird eine nichtlineare Zunahme der Geschwindigkeitskonstanten für die Reaktion pseudoerster Ordnung mit steigendem Druck (l‐l0OO bar) ermittelt; für den Enolether (IV) ist die Abhängigkeit linear.
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