Give the charge on the central metal ion in each of these. (a) [VCl6]^4- (b) [Sc(H2 O)3 Cl3] (c)

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Give the charge on the central metal ion in each of these....

Give the charge on the central metal ion in each of these. (a) $\left[\mathrm{VCl}_{6}\right]^{4-}$ (b) $\left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{Cl}_{3}\right]$ (c) $\left[\mathrm{Mn}(\mathrm{NO})(\mathrm{CN})_{5}\right]^{3-}$ (d) $\left[\mathrm{Ni}(\mathrm{en})_{2}\left(\mathrm{NH}_{3}\right)_{2}\right]^{2+}$

Give the charge on the central metal ion in each of these.
(a) $\left[\mathrm{VCl}_{6}\right]^{4-}$
(b) $\left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3} \mathrm{Cl}_{3}\right]$
(c) $\left[\mathrm{Mn}(\mathrm{NO})(\mathrm{CN})_{5}\right]^{3-}$
(d) $\left[\mathrm{Ni}(\mathrm{en})_{2}\left(\mathrm{NH}_{3}\right)_{2}\right]^{2+}$

Key Concepts

Ligand Charge

Ligands in coordination complexes can be neutral, anionic, or sometimes cationic. The specific charge of each ligand affects the total charge balance in the complex and therefore must be known or determined to calculate the oxidation state of the central metal ion correctly.

Charge Balance in Coordination Compounds

Determining the charge on the central metal ion involves setting up an equation where the sum of the metal ion's oxidation state and the total charges contributed by all ligands equals the overall charge of the complex. This systematic approach ensures that the oxidation state is accurately computed from the given information.

Coordination Complex

A coordination complex consists of a central metal ion bonded to surrounding molecules or ions known as ligands. The overall charge of the complex is the sum of the metal ion’s charge and the charges of all ligands, which is important for understanding the compound's structure and reactivity.

Oxidation State

The oxidation state (or oxidation number) of the central metal ion in a coordination complex represents the effective charge on the metal after considering the electron contributions from all ligands. It is calculated by balancing the known charges of the ligands with the overall charge of the complex.

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