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Nomenclature of Coordination Compounds

What is the o...

Question

What is the oxidation state of Co in the complex $[C o C l_{2} (e n)_{2}]^{+}$ ?

[Note: Ethylenediamine (en) $= H_{2} N - C H_{2} - C H_{2} - N H_{2}$ ]

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Solution

Ethylenediamine is a neutral ligand and chloride has a $- 1$ charge associated with it.

Let's assume oxidation state of Cobalt $= x$ and, that of $C l^{-} = - 1$

Then,

$x + 2 \times (- 1) = + 1 ⟹ x = + 3$

Hence, the oxidation state of Co is +3.

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