Which of the following complexes does not have `d^(2) Sp^(3) ` hybridisation ?

Options

A. `[Cr(NH_(3))_(6)]^(3+)`
B. `[Fe(CN)_(6)]^(3-)`
C. `[Co(NH_(3))_(6)]^(3+)`
D. `[Co(H_(2)O)_(6)]^(3+)`

Answer

D

Explanation

`H_(2)O` is a weak field ligand hence unpaired electrons of 3d - orbital can't be paired up , hence `[Co (H_(2)O)_(6)]^(3+)` does not show `d^(2) sp^(3)` - hybridisation .