Answer: Chelate effect = combination of enhanced entropy (more particles released on complex formation) and entropic contribution to Gibbs energy.
- A Chelate effect = combination of enhanced entropy (more particles released on complex formation) and entropic contribution to Gibbs energy
- B Each individual metal-donor bond within the chelate ring being inherently far stronger than usual under most conditions encountered
- C The chelate generally containing a much larger total number of covalent bonds overall as frequently observed in practice in many documented cases
- D The chelate possessing a far greater degree of ionic character than ordinary monodentate complexes according to conventional understanding
Correct answer: A. Chelate effect = combination of enhanced entropy (more particles released on complex formation) and entropic contribution to Gibbs energy
Explanation: When a chelate forms from a polydentate ligand, more solvent molecules are released than with an equivalent number of monodentate ligands, giving positive Delta_S and more negative Delta_G.
The three common coordination geometries: octahedral (6 ligands), tetrahedral (4 ligands), and square planar (4 ligands in one plane).
Concept context
Study of compounds where a central metal atom is bonded to surrounding ligands. Covers nomenclature, types of isomerism, bonding theories (VBT, CFT), and applications in medicine, photography, and industry.