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why cf3- does not form backbonding while cl3 – form back bonding??

why cf3- does not form backbonding while cl3 – form back bonding??
 
 

Grade:12

1 Answers

Kajal Banga
askIITians Faculty 105 Points
4 months ago
Dear student

In CF3-, carbon atom is donating its electron pair but fluorine is not having any empty orbital to accomodate those electrons(absence of d-orbitals).

But in case of CCl3-, because of empty 3d-obital, Cl can accomodate the pair of electrons donated by carbon.

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