Question:
Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
Why are Mn2+ compounds more stable than Fe2+ towards oxidation to their +3 state?
Updated On: Sep 29, 2023
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Solution and Explanation
Electronic configuration of Mn2+ is [Ar]1818 3d5 .
Electronic configuration of Fe2+ is [Ar]18 3d6 .
It is known that half-filled and fully-filled orbitals are more stable. Therefore, Mn in (+2) state has a stabled 5 configuration. This is the reason Mn2+ shows resistance to oxidation to Mn3+ . Also, Fe2+ has 3d6 configuration and by losing one electron, its configuration changes to a more stable 3d5 configuration. Therefore, Fe2+ easily gets oxidized to Fe+3 oxidation state.
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