The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to `+3` state is :

Options

A. `[Ni("Phen")_3]^(2+)`
B. `[Zn("phen")_3]^(2+)`
C. `[Co("phen")_3]^(2+)`
D. `[Fe("phen")_3]^(2+)`

Answer

D

Explanation

`[Fe("phen")_3]^(2+)` will lose its crystal field stabilization energy upon oxidation of its metal to + 3 state.