Question:
Which among the following complexes is a homoleptic and cationic in nature?
Which among the following complexes is a homoleptic and cationic in nature?
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A homoleptic complex has identical ligands, and a cationic complex carries a positive charge.
Updated On: Jan 30, 2026
- [CoCl\(_2\)(en)\(_2\)]Cl
- [Fe(H\(_2\)O)\(_6\)]Cl\(_3\)
- K[Ag(CN)\(_2\)]
- [Fe(CO)\(_5\)]
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The Correct Option is B
Solution and Explanation
Step 1: Understanding homoleptic and cationic complexes.
A homoleptic complex is one in which all the ligands are the same. A cationic complex has a positive charge. The complex [Fe(H\(_2\)O)\(_6\)]Cl\(_3\) is homoleptic (all water ligands) and cationic (having a positive charge).
Step 2: Analyzing the options.
(A) [CoCl\(_2\)(en)\(_2\)]Cl: This is a heteroleptic complex (with both chloride and ethylenediamine as ligands) and is not cationic.
(B) [Fe(H\(_2\)O)\(_6\)]Cl\(_3\): Correct — This is homoleptic and cationic in nature.
(C) K[Ag(CN)\(_2\)]: This is a heteroleptic complex with cyanide and not cationic.
(D) [Fe(CO)\(_5\)]: This is homoleptic, but it is neutral, not cationic.
Step 3: Conclusion.
The correct answer is (B) [Fe(H\(_2\)O)\(_6\)]Cl\(_3\), as it is homoleptic and cationic.
A homoleptic complex is one in which all the ligands are the same. A cationic complex has a positive charge. The complex [Fe(H\(_2\)O)\(_6\)]Cl\(_3\) is homoleptic (all water ligands) and cationic (having a positive charge).
Step 2: Analyzing the options.
(A) [CoCl\(_2\)(en)\(_2\)]Cl: This is a heteroleptic complex (with both chloride and ethylenediamine as ligands) and is not cationic.
(B) [Fe(H\(_2\)O)\(_6\)]Cl\(_3\): Correct — This is homoleptic and cationic in nature.
(C) K[Ag(CN)\(_2\)]: This is a heteroleptic complex with cyanide and not cationic.
(D) [Fe(CO)\(_5\)]: This is homoleptic, but it is neutral, not cationic.
Step 3: Conclusion.
The correct answer is (B) [Fe(H\(_2\)O)\(_6\)]Cl\(_3\), as it is homoleptic and cationic.
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