Question

`E_((Mn^(2+)//Mn))^°` is −1.18 V. Why is this value highly negative in comparison to neighbouring d block elements?

Answer 1

The `E_((Mn^(2+)//Mn))^°` value is −1.18 V, which is highly negative as compared to other neighbouring d-block elements due to the extra stability of half-filled orbitals of Mn²⁺ (i.e., 3d⁵).