Question

Question #e5065

Answer 1

You mean, what is the oxidation number of Co in `K[Co(CO)_4]`?
Then answer is -1

Explanation:

We know that CO is a neutral ligand and K carries a charge of +1.

Therefore, the complex can be written as `K^+[Co(CO)_4]^-`, Therefore, the oxidation number of Co in the given complex is -1.