Chemistry - Coordination Chemistry Question with Solution | TestHub

Given data:

Ferrocene → Fe oxidation state = +2 (R), ligand = C₅H₅⁻ (i)

Zeise's salt → Pt oxidation state = +2 (R), ligand = Cl⁻ (iv) and η²-bonded ethylene (C₂H₄)

Checking options:

(A) Platinum complex ⇒ Zeise's salt ⇒ R, (iv)

(B) Neutral complex ⇒ Ferrocene ⇒ R, (i)

(D) Sandwich complex ⇒ Ferrocene ⇒ R, (i)

(C) η²-bonded ligand complex ⇒ should be Zeise's salt, not Ferrocene. Option gives R, (i) (C₅H₅⁻ ligand), which is wrong.

Therefore, the incorrect combination is (C).