Answer: Ions inside and outside the coordination sphere.
- A Ions inside and outside the coordination sphere
- B Arrangement of ligands around the metal in typical laboratory settings
- C The metal's oxidation state under usual circumstances
- D The number of ligands according to most researchers
Correct answer: A. Ions inside and outside the coordination sphere
Explanation: Ionisation isomers have the same formula but differ in which ions are inside the square brackets (coordination sphere) vs outside.
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.