Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation:

Analysis of a Platinum coordination complex.

Concept:

EAN and Coordination Isomerism

Solution:

In $\left[\mathrm{Pt}(\mathrm{ox})(\mathrm{py}{)}_2\left({\mathrm{O}}_2\right)\left({\mathrm{H}}_2\mathrm{O}\right)\right],\mathrm{Pt}$ is in the +4 oxidation state.

Oxygen is present as a peroxo ligand ( ${\mathrm{O}}_2{}^{2-}$ ), making its state -2 (Option 1 is wrong).

EAN:  Pt⁴⁺ has 74 electrons; total ligands donate 12. 

EAN = 74 + 12 = 86 (Correct).

Isomerism:  This octahedral complex (M(AA)b₂cd) shows both geometrical and optical isomerism. 

Final Answer:  Option (D)