Answer: Facial (fac) and meridional (mer).
- A Facial (fac) and meridional (mer)
- B Cis and trans
- C Clockwise and anticlockwise
- D Alpha and beta
Correct answer: A. Facial (fac) and meridional (mer)
Explanation: In MA3B3 octahedral: fac isomer has A ligands on one face of the octahedron; mer has A ligands in a plane through the centre.
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.