alleryWhich of the following is a homoleptic complex?
A[Co(NH₃)₆]³⁺
B[CoCl₂(NH₃)₄]⁺
C[Fe(CO)₃(NO)]
D[Co(en)₂Cl₂]⁺
Answer & Solution
Correct answer: A. [Co(NH₃)₆]³⁺
1. Homoleptic complexes have only one kind of ligand around the central metal.
2. [Co(NH₃)₆]³⁺ has six identical NH₃ ligands — homoleptic.
3. The other three have mixed ligands (NH₃ + Cl, CO + NO, en + Cl) and are heteroleptic.
4. So the homoleptic answer is [Co(NH₃)₆]³⁺.
_Source: syllabus Chemistry, Unit 5 "Coordination Compounds", §5.2(h)_
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