The pair of the compounds in which both the metals are in...

The pair of the compounds in which both the metals are in the highest possible oxidation state is a. $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3},\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3}$ b. $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}, \mathrm{MnO}_{2}$ c. $\mathrm{TiO}_{3}, \mathrm{MnO}_{2}$ d. $\mathrm{CrO}_{2} \mathrm{Cl}_{2}, \mathrm{MnO}_{4}^{-}$

The pair of the compounds in which both the metals are in the highest possible oxidation state is
a. $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3},\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3}$
b. $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}, \mathrm{MnO}_{2}$
c. $\mathrm{TiO}_{3}, \mathrm{MnO}_{2}$
d. $\mathrm{CrO}_{2} \mathrm{Cl}_{2}, \mathrm{MnO}_{4}^{-}$

Key Concepts

Oxidation State Determination

This concept involves assigning formal charges to atoms in a compound such that the sum equals the overall charge. In transition metal compounds, particularly, the oxidation state of the metal is deduced by accounting for the charges of all the ligands or atoms attached. This basic method allows chemists to understand electron distribution and reactivity in a compound.

Highest Oxidation State

The highest oxidation state of a metal is the maximum positive charge it can bear in a stable compound. This state often occurs when the metal is bonded to highly electronegative ligands or atoms, which draw electrons away from the metal. Understanding this concept is important as it relates to the stability, reactivity, and chemical behavior of metal compounds.

Coordination Complexes

Coordination complexes consist of a central metal ion surrounded by a set of ligands. The nature of these ligands, whether neutral or anionic, influences the oxidation state assigned to the metal. Studying these complexes is crucial for understanding how different ligand environments stabilize unusual or high oxidation states of the metal.

Ligand Effects on Metal Oxidation States

Ligands impact the oxidation state of the central metal ion through their electronic properties. Strongly electron-withdrawing ligands can stabilize higher oxidation states by effectively removing electron density from the metal. This concept is pivotal in predicting the behavior of metal ions in various chemical environments.

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