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Question

The magantate and permanganate ions are tetrahedral, due to :

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Solution

Permanganate (MnO24) :

π-bonds are of dπpπ type
In this manganate ion, two oxygen atoms are having a double bond with the manganese atom while remaining two oxygen atoms are having a single bond.
In this manganate ion, π bonds belong to p-orbitals of oxygen and with d-orbitals of manganese (dπpπ)


Permanganate (MnO4) :


π-bonds are of dπpπ type.
In this permanganate ion, three oxygen atoms are having a double bond with manganese atom and one oxygen atom is having a single bond with manganese atom.
In this permanganate ion, π bonds belong to p-orbitals of oxygen and with d-orbitals of manganese (dπpπ)
As a result, the manganate and permanganate ions are tetrahedral, due to the π bonding involving overlap of p-orbitals of oxygen with d-orbitals of manganese.

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