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

The pair of the compounds in which both the merals are in the highcst possible oxidation srate is (a) $\left[\mathrm{Fe}(\mathrm{N})_{6}\right]^{3-},\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$ (b) $\mathrm{CrO}_{2} \mathrm{Cl}_{2}, \mathrm{MnO}_{4}^{-}$ (c) $\mathrm{T} \mathrm{O}_{3}, \mathrm{MnO}_{2}$ (d) $\left[\mathrm{Co}(\mathrm{CN})_{d}\right]^{3}, \mathrm{MnO}_{2}$

The pair of the compounds in which both the merals are in the highcst possible oxidation srate is
(a) $\left[\mathrm{Fe}(\mathrm{N})_{6}\right]^{3-},\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$
(b) $\mathrm{CrO}_{2} \mathrm{Cl}_{2}, \mathrm{MnO}_{4}^{-}$
(c) $\mathrm{T} \mathrm{O}_{3}, \mathrm{MnO}_{2}$
(d) $\left[\mathrm{Co}(\mathrm{CN})_{d}\right]^{3}, \mathrm{MnO}_{2}$

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Key Concepts

Oxidation State Determination

This concept refers to the method of assigning a formal charge to a metal in a compound based on the electronegativities of the surrounding ligands and the overall charge of the complex. It is essential for understanding the electron count and reactivity of a coordination compound and for identifying the oxidation state in various compounds.

Highest Possible Oxidation State in Transition Metals

Transition metals can exist in multiple oxidation states, but the highest possible oxidation state is achieved when the metal is surrounded by strongly electronegative ligands or oxo groups that withdraw electrons. This state is significant because it often correlates with unique reactivity and stability in compounds, and many examples, such as in permanganate or chromyl compounds, demonstrate these extreme oxidation states.

Metal-Oxo Complexes

Metal-oxo complexes involve transition metals bonded to oxygen atoms and are critical in exhibiting high oxidation states. Often found in oxoanions or other coordination compounds, these complexes illustrate how electronegative oxygen atoms stabilize high oxidation states, influencing the compound's redox properties and overall chemical behavior.

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