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

Let's analyze each complex to identify the homoleptic complex:

(A) Diamminechloridonitrito-N-platinum (II): This complex contains three different ligands - diammine (NH₃), chlorido (Cl^-), and nitrito-N (NO^2-). It is not a homoleptic complex because it has multiple types of ligands.
(B) Pentaamminecarbonatocobalt (III) chloride: This complex contains two different ligands - pentaammine (NH₃) and carbonato (CO₃^2-). It is not a homoleptic complex because it has multiple types of ligands.
(C) Triamminetriaquachromium (III) chloride: This complex contains two different ligands - triammine (NH₃) and triaqua (H₂O). It is not a homoleptic complex because it has multiple types of ligands.
(D) Potassium trioxalatoaluminate (III): This complex contains only one type of ligand - trioxalato (C₂O₄^2-). It is a homoleptic complex because all the ligands surrounding the central metal ion (aluminum in this case) are of the same type.

Therefore, the correct answer is (D): Potassium trioxalatoaluminate (III).

Answer 2

The hololeptic complex refers to a complex where all the ligands are identical.
Among the options provided:

• Diamminechloridonitrito-N-platinum (II) contains three different ligands: ammine (NH₃), chlorido (Cl), and nitrito-N (NO₂), so it's not hololeptic.
• Pentaamminecarbonatocobalt (III) chloride has two different ligands: ammine (NH₃) and carbonato (CO₃), so it's not hololeptic.
• Triamminetriaquachromium (III) chloride contains three ligands: ammine (NH₃), aqua (H₂O), and chlorido (Cl), so it's not hololeptic.
• Potassium trioxalatoaluminate (III) contains one type of ligand: trioxalato (C₂O₄), so it is a hololeptic complex.

So, the correct option is (D): Potassium trioxalatoaluminate (III)