Question:
Which among the following complexes is NOT a heteroleptic complex?
Which among the following complexes is NOT a heteroleptic complex?
Show Hint
In a heteroleptic complex, there are at least two different types of ligands, while in a homoleptic complex, all ligands are the same.
Updated On: Mar 28, 2026
- \([Pt(NH_3)_4Br_2]Br_2\)
- \([Co(NH_3)_6]Cl_3\)
- \([Co(en)_2Cl_2]^+\)
- \([Co(en)_2Cl_2]Cl\)
Show Solution
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The Correct Option is B
Solution and Explanation
Step 1: Understanding heteroleptic complexes.
A heteroleptic complex contains two or more different types of ligands. In contrast, a homoleptic complex contains only one type of ligand.
Step 2: Analyzing the options.
(A) \([Pt(NH_3)_4Br_2]Br_2\): Incorrect. This is a heteroleptic complex because it contains two different ligands: ammonia (NH₃) and bromide (Br⁻).
(B) \([Co(NH_3)_6]Cl_3\): Correct — This is a homoleptic complex because it contains only one type of ligand, ammonia (NH₃).
(C) \([Co(en)_2Cl_2]^+\): Incorrect. This is a heteroleptic complex because it contains two different ligands: ethylenediamine (en) and chloride (Cl⁻).
(D) \([Co(en)_2Cl_2]Cl\): Incorrect. This is also a heteroleptic complex as it contains two different ligands: ethylenediamine (en) and chloride (Cl⁻).
Step 3: Conclusion.
The correct answer is (B) \([Co(NH_3)_6]Cl_3\), which is a homoleptic complex containing only one type of ligand.
A heteroleptic complex contains two or more different types of ligands. In contrast, a homoleptic complex contains only one type of ligand.
Step 2: Analyzing the options.
(A) \([Pt(NH_3)_4Br_2]Br_2\): Incorrect. This is a heteroleptic complex because it contains two different ligands: ammonia (NH₃) and bromide (Br⁻).
(B) \([Co(NH_3)_6]Cl_3\): Correct — This is a homoleptic complex because it contains only one type of ligand, ammonia (NH₃).
(C) \([Co(en)_2Cl_2]^+\): Incorrect. This is a heteroleptic complex because it contains two different ligands: ethylenediamine (en) and chloride (Cl⁻).
(D) \([Co(en)_2Cl_2]Cl\): Incorrect. This is also a heteroleptic complex as it contains two different ligands: ethylenediamine (en) and chloride (Cl⁻).
Step 3: Conclusion.
The correct answer is (B) \([Co(NH_3)_6]Cl_3\), which is a homoleptic complex containing only one type of ligand.
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