Which of the following descriptions about `[FeCl_(6)]^(4-)` is correct about the complex ion ?

Options

A. `sp^(3) d` , inner orbital complex , diamagnetic
B. `sp^(3) d^(2)` , outer orbital complex , paramagnetic
C. `d^(2) sp^(3)` , inner orbital complex , paramagnetic
D. `d^(2) sp^(3)` , outer orbital complex , diamagnetic .

Answer

B

Explanation

In `[FeCl_(6)]^(4-)` oxidation state of `Fe = + 2 , Fe^(2+) = 3d^(6)`
`[FeCl_(6)]^(4-) : (##NCERT_OBJ_FING_CHE_XII_C09_E01_066_S01.png" width="80%">
Paramagnetic due to presence of four unpaired electrons .