Question

Homoleptic complex from the following complexes is:

• A. Diamminechloridonitrito-N-platinum (II)
• B. Pentaamminecarbonatocobalt (III) chloride
• C. Triamminetriaquachromium (III) chloride
• D. Potassium trioxalatoaluminate (III)

Answer 1

The Correct Option is D

To determine which of the given complexes is homoleptic, we need to understand the definition of a homoleptic complex. A homoleptic complex is one in which a central metal ion is bonded only to one type of ligand.

Let's analyze the given options one by one:

1. Diamminechloridonitrito-N-platinum (II): This complex contains different types of ligands: ammine, chloride, and nitrito-N, making it a heteroleptic complex.
2. Pentaamminecarbonatocobalt (III) chloride: This complex, as implied by its name, consists of ammines and a carbonate ligand, along with a chloride ion outside the coordination sphere, which again makes it heteroleptic.
3. Triamminetriaquachromium (III) chloride: This complex contains ammine and aqua ligands based on the name (ammines and aquas), hence it is also heteroleptic.
4. Potassium trioxalatoaluminate (III): Here, the central aluminum ion is bonded with three oxalate ligands. Since only oxalate ligands are present, it forms a homoleptic complex.

Therefore, the correct answer is Potassium trioxalatoaluminate (III), as Aluminum is coordinated purely with oxalate ligands, making it homoleptic.