Which of the following ions show higher spin only magnetic moment value?

Options

A. `Ti^(3+)`
B. `Mn^(2+)`
C. `Fe^(2+)`
D. `Co^(3+)`

Answer

B, C

Explanation

`Ti^(3+) : 3d^1 (or 4_(2g)^1) ` (one unpaired `e^-` ) , `Mn^(2+) : 3d^5 ( or t_(2g)^3 e_g^2)` (5 unpaired `e^-`) , `Fe^(2+) : 3d^6( or t_(2g)^4 e_g^2)` (4 unpaired `e^-`) , `Co^(3+) : 3d^6 or (t_(2g)^6 e_g^0)` (0 unpaired electron) , thus only `Mn^(2+) ` and `Fe^(2+)` show higher spin megnetic moment .