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- W2003705369 abstract "L'analyse conformationnelle de pyrazolines-1 diversement substituées sur les carbones 3 et 4 a été réalisée à l'aide de la RMN. L'utilisation de l'équation de Karplus pour interpréter les valeurs des constantes de couplage 3J(H4H5) permet de vérifier l'existence d'un équilibre entre deux formes enveloppes. L'angle d'ouverture de l'enveloppe, calculé sur un composé modèle figé dans une seule conformation, est voisin de 36°. Les pourcentages relatifs des deux conformères à la température ambiante sont calculés pour les divers pyrazolines étudiées. Conformational analysis of 1-pyrazolines bearing different substituents on carbons 3 and 4 has been achieved by NMR. The use of the Karplus equation to explain the values of the coupling constants 3J(H4H5) allows us to ‘check’ the existence of an equilibrium between two envelope conformations. The folding angle of the envelope, calculated on a model compound which is held in only one conformation, wad found to be near 36°. The ratio of the two conformers at room temperature is calculated for the various pyrazolines studied." @default.
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- W2003705369 date "1973-10-01" @default.
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- W2003705369 title "Analyse conformationnelle de pyrazolines-1 substituées" @default.
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- W2003705369 doi "https://doi.org/10.1002/mrc.1270051002" @default.
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