Answer: Two different donor atoms (e.g., SCN- via S or N).
- A Two different donor atoms (e.g., SCN- via S or N)
- B Two identical donor atoms positioned on opposite ends of the ligand
- C Multiple chelate rings formed simultaneously with one metal centre
- D Oxygen exclusively, regardless of any other potential donor atoms
Correct answer: A. Two different donor atoms (e.g., SCN- via S or N)
Explanation: Ambidentate ligands (like SCN-, NO<sub>2</sub>-) have two potential donor atoms and can bond to the metal through either one.
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.