Square planar vs tetrahedral coordination in transition metals:
  1. Repeating the search by stepping QA through each column of the transition metals individually, students can then discover for themselves how the position of an element in the periodic table influences whether it is predominantly square planar or tetrahedrally coordinated.
  2. Investigate the structures in the regions between the four "hotspots"
  3. Change the restricted coordination from 4 to 3 or 5 or 6.
  4. A cheminformatics challenge: How to correlate structure with spin state!