polarite.py

Created by egenspergersara

Created on March 21, 2024

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Electronégativé : 
Aptitude d'un atome A, lié à un
atome B, à attirer vers lui le
doublet d'e- de la liaison 
covalente A-B
-> apparit. charge partielle

Liaison covalente polaire, si 2
atomes ont des électronégativés 
(suffisamment) différentes 

- apolaire x < 0,3 à 0,4
- polaire 0,3 à 0,4 < x < 2
- inoique x > 2 

C-C et C-H apolaires 

Toutes les liaisons sont apolaires
Molécule apolaire 

Si contient 1 seule liaison et 
elle est polaire : 
Molécule polaire 

Si contient des liaisons 
polaires : 
- Schéma de Lewis -> géométrie
-> charges partielles -> G+= G-
-> Molécule apolaire 

- Schéma de Lewis -> géométrie
-> charges part. -> G+ diff G-
-> Molécule polaire 

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