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Ordre de liaison


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  • Ancien Responsable Matière
  • Solution
Posted

Salut, on fait le diagramme énergétique pour O2 et O2ˆ-2 (cf image 1 et 2), on regarde le nombre d'électrons sur les liantes et sur les antiliantes et ensuite on applique la formule :

ol (ordre de liaison) = (nb e- liant - nb e- antiliant)/2

Pour O2 on a :

ol = (8-4)/ 2= 2

Pour O2ˆ2- on a :

ol = (8-6)/2 = 1 

Donc on a bien ol (O2ˆ2-) < ol (O2).

SmartSelect_20231204_224511_Samsung Notes.jpg

SmartSelect_20231204_224340_Samsung Notes.jpg

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