Answer: The donor atom through which an ambidentate ligand coordinates (e.g., NO 2 - via N or O).
- A The donor atom through which an ambidentate ligand coordinates (e.g., NO<sub>2</sub>- via N or O)
- B Their overall molecular formula, which differs between the two isomers according to conventional understanding
- C The oxidation state assigned to the central metal atom in routine practice overall
- D The total number of electrons present in the complex in most cases under typical conditions
Correct answer: A. The donor atom through which an ambidentate ligand coordinates (e.g., NO<sub>2</sub>- via N or O)
Explanation: Linkage isomers: same formula but the ambidentate ligand bonds through different atoms. Example: [Co(NO<sub>2</sub>)(NH<sub>3</sub>)5]2+ vs [Co(ONO)(NH<sub>3</sub>)5]2+.
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.