Sp^3d^2 and sp^3d^3 hybridisation

[Priyadarshini]

Hi. During the formation of PCl5, the hybridisation is sp^3d and the dz^2 oribital is used. But in the cases of sp^3d^2 and sp^3d^3 hybridisation, like in the formation of SF6 and IF7 respectively, which of the d orbitals out of the five are used to make the hybrid orbital?
Thanks!

 

[DrDu]

This theory has long been proven wrong. In the formation of main group compounds, d-orbitals are energetically too high to contribute in hybridization.

 

[Priyadarshini]

This theory has long been proven wrong. In the formation of main group compounds, d-orbitals are energetically too high to contribute in hybridization.

This theory has been proven wrong? What does the new theory state? With the new theory could you please explain how SF6 and IF7 forms?
Thanks!

 

[DrDu]

This theory has been proven wrong? What does the new theory state? With the new theory could you please explain how SF6 and IF7 forms?
Thanks!

In terms of valence bond theory, which you seem to be learning at the moment, you would describe bonding in terms of resonating bonds.

 

[Priyadarshini]

In terms of valence bond theory, which you seem to be learning at the moment, you would describe bonding in terms of resonating bonds.

Oh! Thank you!