The complex ion having minimum magnitude of `Delta_o(CFSE)` is

Options

A. `[Cr(H_2O)_6]^(3+)`
B. `[Co(Cl)_6]^(3-)`
C. `[Co(NH_3)_6]^(3+)`
D. `[Cr(CN)_6]^(3-)`

Answer

B

Explanation

The magnitude of `Delta_0` follows the order :
`Cl^(-) lt H_2O lt NH_3 lt CN^(-)`