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- W1991234486 abstract "Enthalpies of sublimation for pyrazole and imidazole have been obtained by calorimetry at 298.15K. The ΔH0sub (298.15 K) values for these two compounds are, respectively, 69.16 ± 0.32 and 74.50 ± 0.40 kJ mole−1. From literature data obtained by combustion calorimetry for ΔH0f (c, 298.15 K), the enthalpies of formation of these compounds in the gaseous state (pyrazole: 185.1 ± 2.3 kJ mole−, imidazole: 133.0 ± 1.7 kJ mole−1) have been derived. Several energy values related to the molecular structure of these two compounds (as resonance energy, enthalpy of isomerization, …) have been determined. The study of pyrazole has enabled us to contribute to the evaluation of some characteristics of the NN bond. Les enthalpies de sublimation des molécules de pyrazole et d'imidazole ont été déterminées par calorimeétrie à 298,15 K. Les valeurs de ΔH0sub (298,15 K), pour ces deux molécules sont respectivement égales à (69,16 ± 0,32) et (74,50 ± 0,40) kJ mole−1. En utilisant les valeurs de ΔH0f (c, 298,15 K) de la littérature, nous avons pu calculer les enthalpies de formation de ces molécules à l'état gazeux (pyrazole: 185,1 ± 2,3 kJ mole−1; imidazole: 133,0 ± 1,7 kJ mole−). Plusieurs grandeurs énergétiques relatives à la structure de ces molécules ont été déterminées: énergie de conjugaison, enthalpie d'isomérisation, … L'étude de la molécule de pyrazole nous a permis d'apporter notre contribution dans l'évaluation de certaines grandeurs propres à la liaison NN." @default.
- W1991234486 created "2016-06-24" @default.
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- W1991234486 date "1980-10-01" @default.
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- W1991234486 title "Thermodynamique de composes azotes. VII. Etude thermochimique du pyrazole et de l'imidazole" @default.
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- W1991234486 doi "https://doi.org/10.1016/0040-6031(80)80093-1" @default.
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