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GENERALLY TRANS ISOMERS ARE MORE STABLE THAN CIS ISOMERS BUT 1,2-difluoroethylene CIS ARE MORE STABLE THAN TRANS ISOMERS...????EXPLIAN REASON PLEASE??

GENERALLY TRANS ISOMERS ARE MORE STABLE THAN CIS ISOMERS BUT 1,2-difluoroethylene
CIS ARE MORE STABLE THAN TRANS ISOMERS...????EXPLIAN REASON PLEASE??
 

Grade:11

1 Answers

Bhavya
askIITians Faculty 1281 Points
8 years ago
Cis 1,2-difluoroethylene is more stable than trans 1,2-difluoroethylene because the two highest singly occupied core orbitals have symmetry that allows them to make two two-electron multicentre bonds with two singly occupied fluorine type ligand MO’s which is not possible in trans isomer.

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