Given the colors observed for VO43-(orthovanadate ion), (chromate ion), and MnO4-(permanganate ion) (see Exercise 23.82), what can

Question:

Given the colors observed for VO43-(orthovanadate ion), (chromate ion), and MnO4-(permanganate ion) (see Exercise 23.82), what can you say about how the energy separation between the ligand orbitals and the empty d orbitals changes as a function of the oxidation state of the transition metal at the center of the tetrahedral anion?