Consider the following coordination entities based on their IUPAC names: (I) Potassium hexacyanidoferrate(II) (II) Tetraammineaquachloridocobalt(III) chloride (III) Tris(ethane-1,2-diamine)cobalt(III) sulphate (IV) Amminebromidochloridonitrito-N-platinate(II) ion Which of the above are classified as heteroleptic complexes?

Step-by-step solution

A homoleptic complex contains only one type of ligand bound to the central metal atom or ion, while a heteroleptic complex contains more than one type of ligand. (I) Potassium hexacyanidoferrate(II): The complex ion is [Fe(CN)₆]⁴⁻ . It contains only one type of ligand ( CN^- ), so it is homoleptic. (II) Tetraammineaquachloridocobalt(III) chloride: The complex ion is [Co(NH₃)₄(H₂O)Cl]²⁺ . It contains three different types of ligands ( NH₃ , H₂O , and Cl^- ), so it is heteroleptic. (III) Tris(ethane-1,2-diamine)cobal