O N-H
|| ||
H-C-H H-C-H
Méthanal Méthanimine
1. Recopier les schémas de Lew...
O N-H
|| ||
H-C-H H-C-H
Méthanal Méthanimine
1. Recopier les schémas de Lewis incomplets, puis les
compléter en ajoutant un (ou des) doublet(s) non liant(s),
sachant que chaque atome vérifie la règle de stabilité,
2. L'énergie d'atomisation est l'énergie à fournir pour
rompre toutes les liaisons d'une molecule et obtenir des
atomes,
a. Calculer les énergies de liaison des liaisons C-O et C=N
b. En deduire, parmi les doubles liaisons C=O et C-N, celle
qui est la plus stable
Données:
Eliaison (C-H) - 413 USI.
Eliaison (N-H)= 391 USI
Eatomisation (methanal) = 1567 USL
Eatomisation (méthanimine) - 1564 USI
-
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