Question
Given below are two statements:
Statement I : $\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack^{3 +}$ is a homoleptic complex whereas $\left\lbrack Co\left( {NH}_{3} \right)_{4}{Cl}_{2} \right\rbrack^{+}$is a heteroleptic complex.
Statement II : Complex $\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack^{3 +}$ has only one kind of ligands but $\left\lbrack Co\left( {NH}_{3} \right)_{4}{Cl}_{2} \right\rbrack^{+}$has more than one kind of ligands.
In the light of the above statements, choose the correct answer from the options given below.
Options
Solution
Sol. [Key Concept: Homoleptic and heteroleptic complexes]
A homoleptic complex has only one kind of coordinated ligand.
[Co(NH₃)₆]³⁺ contains only NH₃ ligands and is homoleptic.
[Co(NH₃)₄Cl₂]⁺ contains NH₃ and Cl⁻ and is heteroleptic.
Both statements are true, option (3).
Ligand type, rather than the number of ligand molecules, is the distinction.
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