Stability Constant Concept
Mediumchemistry
Higher stability of chelates compared to analogous monodentate complexes is primarily due to:
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Solution
Incorrect! Answer:
Chelate effect (entropy gain)
- Chelation: When a multidentate ligand binds to a metal to form a ring structure.
- Thermodynamic Basis: Consider the displacement reaction: [M(NH3)6]+3(en)→[M(en)3]+6(NH3).
- Entropy (ΔS): In this reaction, 4 reactant particles produce 7 product particles. This large increase in molecular dispersal leads to a high entropy gain.
- Stability: This favorable entropy change makes the formation constant (β) for chelates several orders of magnitude higher than for non-chelating complexes.
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About This Question
- Subject
- chemistry
- Chapter
- coordination compounds
- Topic
- stability constant concept
- Difficulty
- Medium
- Year
- 2025
This medium difficulty chemistry question is from the chapter coordination compounds, covering the topic of stability constant concept. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of coordination compounds concepts.
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