In which of the ion pairs, magnetic property depends on the strngth of ligand present in the complex ?

Options

A. `Ti^(3+), V^(3+)`
B. `Cr^(3+), Mn^(4+)`
C. `Cr^(2+), Mn^(3+)`
D. `Mn^(2+), Fe^(3+)`

Answer

C, D

Explanation

`d^(4)` to `d^(7)` configuration are affected by strength of ligand. `Cr^(2+) to d^(4),Mn^(3+) to d^(4),Mn^(2+) to d^(5),Fe^(3+) to d^(5)`