Which statement is incorrect?

Options

A. `[Ni(CO)_(4)]` - tretrahedral, paramagnetic
B. `[Ni(CN)_(4)]^(2-)` - square planar, diamagnetic
C. `[Ni(CO)_(4)]` - tetrahedral, diamagnetic
D. `[Ni(CI)_(4)]^(2-)` - tetrahedral, paramagnetic

Answer

A

Explanation

In `[Ni(CO)_(4)]` , the oxidation number of Ni is zero. `Ni^(0) (3d^(8) 4s^(2))` Since CO is a strong field ligand, the electron configuration is resuffled so as to make 4s orbital empty for `sp^(3)` hybrization. All the electrons arer paired and the complex is tetrahedral.