Which of the following complex species does not involve inner orbital hybridisation ?

Options

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

Answer

A

Explanation

`[CoF_(6)]^(3-) ` is an outer orbital complex ion which has `SP_(3) d^(2)` - hybridisation because `F^(-)` is is a weak field ligand `[CoF_(6)]^(3-)`