24. Transition Metals and Coordination Compounds

Which of the following complexes will have the largest crystal field splitting energy?

For each of the following complexes, draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons.

(a) [Pt(NH3)4]2+ (square planar)

Draw a crystal field energy-level diagram for a square planar complex, and explain why square planar geometry is especially common for d⁸ complexes.

For each of the following complexes, draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons. 

(d) [Cu(en)2]2+ (square planar)