The brown ring complex compourd is formulated as [Fe(H2 O), NO^+] SO4 . The oxidation state of i

step 1 In this problem, when brown ring complex dissolving water it dissociated into FEH2O whole 5 NO 2

The brown ring complex compourd is formulated as [Fe(H2 O),...

The brown ring complex compourd is formulated as $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right), \mathrm{NO}^{+}\right] \mathrm{SO}_{4} .$ The oxidation state
of iron is
(a) 1
(b) 2
(c) 3
(d) 1

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Key Concepts

Ligand Charge Characteristics

Ligands can be neutral or charged (either anionic or cationic), and their individual characteristics are essential when determining the oxidation state of the metal. Understanding whether a ligand donates electrons as a neutral molecule or carries a formal charge is key to correctly evaluating the electron distribution and oxidation state in the metal center.

Charge Balance in Coordination Complexes

Charge balance involves accounting for both the charges on the ligands and any counterions present in the coordination compound. By setting up an equation where the sum of the oxidation state of the central metal and the charges of all ligands equals the known overall charge, one can solve for the oxidation state of the metal.

Oxidation State Determination

In coordination chemistry, the oxidation state of the metal is a formal concept that represents the hypothetical charge the metal would have if all ligands were removed as ions. It is determined by assigning charges to the ligands and ensuring that the sum of these charges plus the oxidation state of the metal equals the overall charge of the complex.

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