What Is Outer Orbital Complex And Inner Orbital Complex?


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In the octahedral structure the central metal atom uses inner
(n -1) d - orbitals or outer (n)d-orbitals for hybridization. This results in
Inner orbital complex
- involving (n-1)d orbitals for d2sp3 hybridization.
The electrons in the metal pair, so the complex is either diamagnetic or will have lesser number of unpaired electrons.
Example: [V(H2O)6]3+, [Co(NH3)6]3+Outer orbital complex
When the complex formed involves use of outer nd - orbitals sp3d2. It is called outer orbital complex. It has a large number of unpaired electrons.
Example: [CoF6]3-, [MnF6]3-, [Fe F6]3- because F- is a weak ligand, it cannot cause force pairing.

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