Fac and Mer isomerism is associated with which of the following general formula? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Facial (fac) and Meridional (mer) isomerism is a specific type of geometrical isomerism found in octahedral complexes. Step 2: It occurs when three identical ligands occupy either the three vertices of one triangular face (fac-isomer) or gird the meridian of the octahedron (mer-isomer). Step 3: This arrangement requires three ligands of one type and three of another, matching the general formula [MA3B3] (option d).