The oxidation number and coordination number | vedclass

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Question

(D) The oxidation number of $K$ is $+1$ and the ligand $CO$ is neutral (oxidation number $= 0$).Let the oxidation number of $Co$ be $x$.In the complex

Vedclass · Accepted Answer

$-1, 4$

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(D) The oxidation number of $K$ is $+1$ and the ligand $CO$ is neutral (oxidation number $= 0$).Let the oxidation number of $Co$ be $x$.In the complex $K[Co(CO)_4]$,the sum of oxidation states is zero:$1 + (x + 4 	imes 0) = 0$$x + 1 = 0$$x = -1$Thus,the oxidation number of $Co$ is $-1$.The coordination number is determined by the number of donor atoms attached to the central metal atom. Since $CO$ is a monodentate ligand and there are $4$ of them,the coordination number is $4$.Therefore,the oxidation number is $-1$ and the coordination number is $4$.

The oxidation number and coordination number of cobalt in $K[Co(CO)_4]$ are

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