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Why are Mn^(2+) compounds more stable than Fe^(2+) comounds towards oxidation to their +3 state ?

Answer»

Solution :Electronic configuration of `Mn^(2+)` is `3d^(5)` which is HALF FILLED and hence stable. Therefore, 3rd ionizatio enthalpy is very high, i.e., 3rd electron cannot be LOST easily. In case of `FE^(2+)` , electronic configuration is `3d^(6)` . Hence, it can loseone electron easily to give the stable configuration `3d^(5)`


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