In which of the following coordination compou | vedclass

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(C) To determine the oxidation state of the central metal ion,we equate the sum of oxidation states of all ligands and the metal to the overall charge

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$Fe(CO)_5$

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(C) To determine the oxidation state of the central metal ion,we equate the sum of oxidation states of all ligands and the metal to the overall charge of the complex.For $Fe(CO)_5$:Let the oxidation state of $Fe$ be $x$.The ligand $CO$ (carbonyl) is a neutral ligand,so its oxidation state is $0$.$x + (5 	imes 0) = 0$$x = 0$Thus,the central metal ion $Fe$ in $Fe(CO)_5$ is in the zero oxidation state.

In which of the following coordination compounds is the central metal ion in the zero oxidation state?

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