Answer:
1. Steric Hindrance: The size of ligands, metal ions and the coordination number must be considered while determining stability.
2. Charge: Charge balance is important to maintain stability in metal complexes. The overall charge of the complex should be neutral, and the ligands must balance the charge of the metal ion.
3. Chelate Effect: Metal complexes with chelating ligands generally show higher stability due to the formation of a ring structure that enhances the stability of coordination bonds.
4. Solvent: The nature of the solvent and its polarity affect the stability of metal complexes. An appropriate solvent should be chosen to ensure optimum stability of the complex.
5. Acid-Base Equilibria: The acidity or basicity of the ligands affects metal complex stability.
6. Temperature: The stability of metal complexes is also temperature-sensitive. A change in temperature can alter the stability of metal complexes.
7. Presence of Other Ions: The presence of other ions such as salts, counter-ions, or other metal ions can affect metal complex stability.
8. Steric Crowding: The presence of bulky groups in ligands can hinder coordination, leading to decreased stability.