Which of these statements about `[Co(CN)_6]^(3-)` is true?

Options

A. `[Co(CN)_(6)]^(3-)` has four unpaired electrons and will be in a high-spin configuration
B. `[Co(CN)_(6)]^(3-)` has no unpaired electrons and will be in a high-spin configuration
C. `[Co(CN)_(6)]^(3-)` has no unpaired electrons and will be in a low-spin configuration
D. `[Co(CN)_(6)]^(3-)` has four unpaired electrons and will be in a low-spin configuration

Answer

C

Explanation

In this complex, `CN^(-)` is a strong field ligand. As a result, all the 3d-electrons will be paired up resulting in a low spin complex