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-)` forms outer orbital complex with `sp^(3)d^(2)` hybridisation as `F^(-)` has a weak ligand field.