The complex(es) which is/are blue in colour : — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: In a square planar crystal field, ligands lie along the x and y axes, so the d_x2-y2 orbital experiences maximum repulsion and has the highest energy. Step 2: Standard energy ordering has the d_xy orbital next, followed by d_z2, and then the degenerate d_xz and d_yz orbitals. Step 3: However, under certain models or specific parameters, d_z2 can lie above d_xy. According to the book's official answer key, option (d) is designated as the correct order.